CN105229922A - Radio-frequency (RF) power amplification processing method, Doherty power amplifier and wireless transmitting-receiving equipments - Google Patents
Radio-frequency (RF) power amplification processing method, Doherty power amplifier and wireless transmitting-receiving equipments Download PDFInfo
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- CN105229922A CN105229922A CN201380076710.6A CN201380076710A CN105229922A CN 105229922 A CN105229922 A CN 105229922A CN 201380076710 A CN201380076710 A CN 201380076710A CN 105229922 A CN105229922 A CN 105229922A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0288—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
Abstract
The embodiment of the present invention provides a kind of radio-frequency (RF) power amplification processing method, Doherty power amplifier and wireless transmitting-receiving equipments.Radio-frequency (RF) power amplification processing method of the present invention, comprising: the watt level detecting the radio-frequency input signals of Doherty power amplifier; If the power of radio-frequency input signals is less than preset input power, then control the main power amplifier that radio-frequency input signals all inputs Doherty power amplifier; If the power of radio-frequency input signals is more than or equal to preset input power, then control main power amplifier and the auxiliary power amplifier of radio-frequency input signals input Doherty power amplifier; Wherein, preset input power is determined according to the pulling figure of described main power amplifier.The embodiment of the present invention improves power amplification efficiency and the gain of Doherty power amplifier.
Description
RF power amplification processing method, Doherty power amplifier and the wireless transmitting-receiving equipments technical field communication technology of the embodiment of the present invention, more particularly to a kind of RF power amplification processing method, Doherty power amplifier and wireless transmitting-receiving equipments.Background technology is in the equipment that base station etc. has radio transmission-receiving function, radio-frequency power amplifier（Abbreviation RF power amplification) be transceiver core cell.RF power amplification is responsible for the signal that the signal of DC energy is changed into RF energy to launch, and if energy loss is excessive, then can reduce power amplification efficiency.
Therefore, prior art proposes doherty（Abbreviation Doherty) power amplifier.Doherty power amplifiers include main power amplifier and auxiliary power amplifier, two power amplifiers use different types, different input signal power enlarging functions are undertaken respectively, so as to ensure that two power amplifiers are all operated in respective saturation region as much as possible, so as to ensure that whole Doherty power amplifier all maintains higher output signal power in the range of as far as possible big input signal power.
In existing Doherty power amplifier, when the signal power for inputting auxiliary power amplifier exceedes preset value, auxiliary power amplifier and main power amplifier work, but when the signal power for inputting auxiliary power amplifier is no more than preset value, then auxiliary power amplifier does not work, only main power amplifier work, in this case, the power amplification efficiency of Doherty power amplifier and gain be not high, and the power amplification efficiency for the power amplifier module being made up of Doherty power amplifiers and other power amplifiers and gain be not also high.The content of the invention embodiment of the present invention provides a kind of RF power amplification processing method, Doherty power amplifier and wireless transmitting-receiving equipments, to improve the power amplification efficiency of Doherty power amplifier and the power amplification efficiency and gain of gain and whole power amplifier module.
In a first aspect, the embodiment of the present invention provides a kind of RF power amplification processing method, including：
Detect the watt level of the radio-frequency input signals of Doherty power amplifier；
If the power of the radio-frequency input signals is less than preset input power, the radio-frequency input signals is controlled to fully enter the main power amplifier of the Doherty power amplifier；
If the power of the radio-frequency input signals is more than or equal to preset input power, control the radio frequency defeated
Enter main power amplifier and auxiliary power amplifier that signal inputs the Doherty power amplifier；Wherein, the preset input power is determined according to the pulling figure of the main power amplifier.
In the first possible implementation of first aspect, the size of the power of the radio-frequency input signals of the detection Doherty power amplifier, including：
The size of the power of the radio-frequency input signals of Doherty power amplifier described in detection electric circuit inspection in the Doherty power amplifier；
If the power of the radio-frequency input signals is less than preset input power, the radio-frequency input signals is controlled to fully enter the main power amplifier of the Doherty power amplifier, including：
If it is described that the control circuit that the power of radio-frequency input signals described in the detection electric circuit inspection is less than in preset input power, the Doherty power amplifiers controls the radio-frequency input signals to fully enter
The main power amplifier of Doherty power amplifier；
If the power of the radio-frequency input signals is more than or equal to preset input power, the radio-frequency input signals is controlled to input the main power amplifier and auxiliary power amplifier of the Doherty power amplifier, including：
If the control circuit that the power of radio-frequency input signals described in the detection electric circuit inspection is more than or equal in preset input power, the Doherty power amplifier controls the radio-frequency input signals to shunt the main power amplifier and auxiliary power amplifier for being input to the Doherty power amplifier.
According to the first possible implementation of first aspect, in second of possible implementation, the detection circuit is wave detector, described to control circuit to be power reflection device；
The radio-frequency power input of the Doherty power amplifier is connected with the first end of the circulator in the Doherty power amplifier, second end of the circulator is connected with the input of the main power amplifier, 3rd end of the circulator is connected with the input of the auxiliary power amplifier, the detection signal input part of the wave detector is connected with the radio-frequency power input, the testing result output end of the wave detector is connected with the control end of the power reflection device, one end ground connection of the power reflection device and the path connection between the control end of the power reflection device and the second end of the circulator and the main power amplifier；
The size of the power of the radio-frequency input signals of Doherty power amplifier described in detection electric circuit inspection in the Doherty power amplifier, including：
The wave detector detects the size of the power of the radio-frequency input signals of the Doherty power amplifier；If the power of radio-frequency input signals is less than preset input power described in the detection electric circuit inspection,
Then the control circuit control radio-frequency input signals in the Doherty power amplifier fully enters the main power amplifier of the Doherty power amplifier, including：
If the wave detector detects that the power of the radio-frequency input signals is less than preset input power, then the power reflection device does not start work according to the signal of the control end, and the radio-frequency input signals fully enters the main power amplifier by the first end of the circulator, the second end of the circulator；
If RF input power described in the detection electric circuit inspection is more than or equal to preset input power, then the control circuit in the Doherty power amplifier controls the radio-frequency input signals to shunt the main power amplifier and auxiliary power amplifier for being input to the Doherty power amplifier, including：
If the wave detector detects that the power of the radio-frequency input signals is more than or equal to preset input power, then the power reflection device works according to the signal enabling of the control end, the radio-frequency input signals is input to the main power amplifier and the power reflection device by the first end of the circulator, the second end of the circulator, and the power reflection and reflection power of input signal are input to the auxiliary power amplifier by the power reflection device by the second end of the circulator, the 3rd end of the circulator.
According to second of possible implementation of first aspect, in the third possible implementation, the power reflection device is limiter or varactor.
Second aspect, the embodiment of the present invention provides a kind of Doherty power amplifier, including：Main power amplifier and auxiliary power amplifier, detection circuit and control circuit；
The detection circuit, the watt level of the radio-frequency input signals for detecting the Doherty power amplifier；
The control circuit, if the power for the radio-frequency input signals is less than preset input power, controls the radio-frequency input signals to fully enter the main power amplifier of the Doherty power amplifier；If the power of the radio-frequency input signals is more than or equal to preset input power, the radio-frequency input signals is controlled to input the main power amplifier and auxiliary power amplifier of the Doherty power amplifier；
Wherein, the preset input power is determined according to the pulling figure of the main power amplifier.
In the first possible implementation of second aspect, the detection circuit is wave detector, described to control circuit for power reflection device, the radio-frequency power amplifier, in addition to：Circulator；
The radio-frequency power input of the Doherty power amplifier is connected with the first end of the circulator in the Doherty power amplifier, second end of the circulator is connected with the input of the main power amplifier, 3rd end of the circulator is connected with the input of the auxiliary power amplifier, the detection signal input part of the wave detector is connected with the radio-frequency power input, and the testing result of the wave detector is defeated
Go out end to be connected with the control end of the power reflection device, one end ground connection of the power reflection device and the path connection between the control end of the power reflection device and the second end of the circulator and the main power amplifier.
According to the first possible implementation of second aspect, in second of possible implementation, the power reflection device is limiter or varactor.
According to second aspect, second aspect the first to second possible implementation any one, in the third possible implementation, the number of the auxiliary power amplifier is at least two.
The third aspect, the embodiment of the present invention provides a kind of wireless transmitting-receiving equipments, including：The radio circuit of the wireless transmitting-receiving equipments includes the Doherty power amplifier any one of claim 58.
In the first possible implementation of the third aspect, the equipment includes：
User equipment, base station, trunking.
RF power amplification processing method of the embodiment of the present invention, Doherty power amplifier and wireless transmitting-receiving equipments, by the watt level for judging radio-frequency input signals, when the power of radio-frequency input signals is less than predetermined power, whole radio-frequency input signals enters main power amplifier and is amplified processing, solve in the prior art when the power of radio-frequency input signals is less than predetermined power, because a part of radio-frequency input signals enters auxiliary power amplifier, auxiliary power amplifier do not work cause Doherty power amplifier power amplification efficiency it is low the problem of, improve power amplification efficiency and the gain of Doherty power amplifier, so as to also improve power amplification efficiency and the gain of whole power amplifier module.Brief description of the drawings is in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
The flow chart for the RF power amplification processing method that Fig. 1 is provided by the embodiment of the present invention one；
The flow chart for the RF power amplification processing method that Fig. 2 is provided by the embodiment of the present invention two；
The flow chart for the RF power amplification processing method that Fig. 3 A are provided by the embodiment of the present invention three；The circuit diagram for the Doherty power amplifier for realizing RF power amplification processing method that Fig. 3 B are provided by the embodiment of the present invention three；
The configuration diagram for the Doherty power amplifier that Fig. 4 is provided by the embodiment of the present invention four；
The configuration diagram for the Doherty power amplifier that Fig. 5 is provided by the embodiment of the present invention five；The configuration diagram for the multichannel Doherty power amplifier that Fig. 6 is provided by the embodiment of the present invention six.Embodiment is to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
The flow chart for the RF power amplification processing method that Fig. 1 is provided by the embodiment of the present invention one.The method of the present embodiment is applied to situation about being amplified the power of radio-frequency input signals by radio-frequency power amplifier on the premise of the power amplification efficiency of radio-frequency power amplifier and gain is improved.This method is performed by configuring the Doherty power amplifier in wireless transmitting-receiving equipments.The method of the present embodiment comprises the following steps：
The watt level of step 110, the radio-frequency input signals of detection Doherty power amplifier.
Power amplifier module is configured with wireless transmitting-receiving equipments, typically it is made up of for the power amplifier module configured in base station 23 stage power amplifiers, faint digital medium-frequency signal could be amplified to required emitting power grade, therefore ensure have great importance to the power amplification efficiency and gain that improve whole power amplifier module as the high power amplification efficiency and gain of the Doherty power amplifier of final power amplifier.In whole power amplifier module, previous stage driving power amplifier before Doherty power amplifier can provide radio-frequency input signals for Doherty power amplifier, in step 110, the power of the radio-frequency input signals provided to Doherty power amplifier previous stage driving power amplifier is detected, to detect the watt level of radio-frequency input signals.
If the power of step 120, radio-frequency input signals is less than preset input power, control radio-frequency input signals fully enters the main power amplifier of Doherty power amplifier.
In the step 120, if the power of radio-frequency input signals is less than preset input power, whole radio-frequency input signals are controlled to be input to the main power amplifier of Doherty power amplifier, main power amplifier is amplified to the power of radio-frequency input signals.
If the power of step 130, radio-frequency input signals is more than or equal to preset input power, control radio-frequency input signals inputs the main power amplifier and auxiliary power amplifier of Doherty power amplifier.
In step 130, if the power of radio-frequency input signals is more than or equal to preset input power, control
Radio-frequency input signals inputs the main power amplifier and auxiliary power amplifier of Doherty power amplifier, and main power amplifier and auxiliary power amplifier are amplified to the power of the radio-frequency input signals of input respectively.
Specifically, by the power for the radio-frequency input signals for detecting Doherty power amplifier, the power of the radio-frequency input signals of detection and preset input power are compared, if the power of radio-frequency input signals is less than preset input power, the whole radio-frequency input signals of control is input to the main power amplifier of Doherty power amplifier, and main power amplifier is amplified to the power of radio-frequency input signals；If the power of radio-frequency input signals is more than or equal to preset input power, then control radio-frequency input signals inputs the main power amplifier and auxiliary power amplifier of Doherty power amplifier, main power amplifier and auxiliary power amplifier are amplified to the power of the radio-frequency input signals of input respectively, wherein preset input power refers to start the reference value that auxiliary power amplifier is started working, when the power for being input to auxiliary power amplifier is more than or equal to preset input power, start auxiliary power amplifier to start working, preset input power is determined according to the pulling figure of main power amplifier, the pulling figure of main power amplifier refers to that main power amplifier leads the characteristic of bow I auxiliary power amplifier work.
The RF power amplification processing method that the present embodiment is provided, by the watt level for judging radio-frequency input signals, when the power of radio-frequency input signals is less than predetermined power, whole radio-frequency input signals enters main power amplifier and is amplified processing, solve in the prior art when the power of radio-frequency input signals is less than predetermined power, because a part of radio-frequency input signals enters auxiliary power amplifier, auxiliary power amplifier again do not work cause Doherty power amplifier power amplification efficiency it is low the problem of, improve power amplification efficiency and the gain of Doherty power amplifier, so as to also improve power amplification efficiency and the gain of whole power amplifier module.
The flow chart for the RF power amplification processing method that Fig. 2 is provided by the embodiment of the present invention two.The present embodiment is further optimized based on above-described embodiment one, reference picture 2, and the method for the present embodiment can include：
The size of the power of the radio-frequency input signals of detection electric circuit inspection Doherty power amplifier in step 210, Doherty power amplifier.
If the control circuit control radio-frequency input signals that step 220, the power of detection electric circuit inspection radio-frequency input signals are less than in preset input power, Doherty power amplifier fully enters the main power amplifier of Doherty power amplifier.
If the control circuit control radio-frequency input signals shunting that step 230, the power of detection electric circuit inspection radio-frequency input signals are more than or equal in preset input power, Doherty power amplifier is input to Doherty work(
The main power amplifier and auxiliary power amplifier of rate amplifier.
The RF power amplification processing method that the present embodiment is provided, by detecting the watt level of electric circuit inspection radio-frequency input signals and being compared the power of radio-frequency input signals and preset input power, when the power of radio-frequency input signals is less than predetermined power, the whole radio-frequency input signals of control circuit control enters main power amplifier and is amplified processing, solve in the prior art when the power of radio-frequency input signals is less than predetermined power, because a part of radio-frequency input signals enters auxiliary power amplifier, but auxiliary power amplifier do not work cause Doherty power amplifier power amplifier gain it is low the problem of, improve the power amplifier gain of Doherty power amplifier, so as to also improve the power amplifier gain of whole power amplifier module.
The flow chart for the RF power amplification processing method that Fig. 3 A are provided by the embodiment of the present invention three.The present embodiment is further optimized based on above-described embodiment two, and the detection circuit in above-described embodiment two can be realized by wave detector, control circuit can be realized by power reflection device, in the present embodiment, reference picture 3A, the method for the present embodiment can include：
The size of step 310, the power of the radio-frequency input signals of wave detector detection Doherty power amplifier.If the power of step 320, wave detector detection radio-frequency input signals is less than preset input power, then power reflection device does not start work according to the signal of control end, and radio-frequency input signals fully enters main power amplifier by the first end of circulator, the second end of circulator.
For example, power reflection device can be limiter or varactor, when using varactor diodes as power reflection device, if the power of the radio-frequency input signals of wave detector detection is less than preset input power, the voltage of the signal exported from wave detector can not cause varactor startup work, radio-frequency input signals can fully enter the input of main power amplifier by the first end and the second end of circulator, i.e. because the P-type semiconductor end of varactor is grounded, the voltage of the signal exported from wave detector is applied to the N-type semiconductor end of varactor, forward voltage is applied with equivalent to varactor, so that the PN junction of varactor is thinning, the PN junction of varactor disappears even when varactor forward conduction, therefore varactor will not produce influence to the load impedance of main power amplifier, in this case, whole radio-frequency input signals of input are amplified by main power amplifier in the state of load impedance matching very well.Similar with operation principle when using varactor diodes as power reflection device using limiter as power reflection device, here is omitted.
If the power of step 330, wave detector detection radio-frequency input signals is more than or equal to preset input power, then power reflection device works according to the signal enabling of control end, radio-frequency input signals is input to main power amplifier and power reflection device by the first end of circulator, the second end of circulator, and power reflection device will be defeated
The power reflection and reflection power for entering signal are input to auxiliary power amplifier by the 3rd end of the second end of the circulator, circulator.
In a step 330, equally illustrated with using varactor diodes as power reflection device, if the power of wave detector detection radio-frequency input signals is more than or equal to preset input power, the voltage of the signal exported from wave detector causes varactor startup work, and radio-frequency input signals is input to main power amplifier and varactor by the first end of circulator, the second end of circulator.Need exist for explanation be, varactor work refers to that the power of input signal can be reflected, specifically, because the P-type semiconductor end of varactor is grounded, when the voltage of the signal exported from wave detector is applied to the N type semiconductor ends of varactor, backward voltage is applied with equivalent to varactor, varactor now is in cut-off state, varactor under this state can be considered as electric capacity, therefore the capacitance of varactor can influence the input impedance of main power amplifier, the input impedance of winner's power amplifier is set to change, when the input impedance of main power amplifier changes, varactor is by the power reflection of input signal.The power reflected through varactor inputs auxiliary power amplifier by the second end of circulator, the 3rd end of circulator, promotes auxiliary power amplifier to start working, carries out load balance factor.Part is still amplified into the radio-frequency input signals of main power amplifier through main power amplifier.
Further, because existing " Traffic Tracking " technology is by adjusting power supply device (Power Supply Unit, abbreviation PSU) voltage adjust the grid voltage of main power amplifier and auxiliary power amplifier, so as to adjust the power output of Doherty power amplifier.For example, it is desired to when the power of output is big, heighten grid voltage.The power hour of output is needed, grid voltage is turned down.But it is due to typically to have a very big filter capacitor in the grid of radio-frequency power amplifier and ensure the performance of Doherty power amplifier, and filter capacitor is basic in microfarad range, for so big capacitive load, current PSU is to be unable to reach so big carrying load ability, grid voltage can not be adjusted rapidly according to the transient change of broadband signal, just no longer it is adjusted in a longer time section after often adjusting a grid voltage, for example, when needing to export high-power daytime, grid voltage is heightened once, when output small-power is needed at night, grid voltage is turned down once.Therefore, when the bandwidth of radio-frequency input signals is wider, PSU is just more difficult to keep up with the transient change of radio-frequency input signals, and also grid voltage cannot be adjusted.But.The RF power amplification processing method that the present embodiment is provided, the voltage of the signal exported from wave detector not only can control whether varactor starts work, and the power distribution of main power amplifier and auxiliary power amplifier can be adjusted, when the voltage of the signal exported from wave detector causes varactor startup work, the power distribution between main power amplifier and auxiliary power amplifier can be adjusted, so as to adjust master
The power output of power amplifier and auxiliary power amplifier, because the voltage of the signal exported from wave detector is relevant with the size of the power of radio-frequency input signals, the power of radio-frequency input signals is bigger, the voltage of the signal exported from wave detector is also bigger, the voltage of the signal of wave detector output can make main power amplifier and auxiliary power amplifier obtain preferable power-division ratios by power reflection device, so as to improve power output and the gain of main power amplifier and auxiliary power amplifier.When the voltage of the signal exported from wave detector can not cause varactor startup work, the voltage of the signal exported from wave detector can adjust the power output of main power amplifier by adjusting the power distribution of main power amplifier.It therefore, it can adapt to the transient change of radio-frequency input signals to adjust the power output of main power amplifier and auxiliary power amplifier in Doherty power amplifier.
The RF power amplification processing method that the present embodiment is provided, the size of the power of radio-frequency input signals is detected by wave detector, when the power of radio-frequency input signals is less than preset input power, power reflection device does not start work, and radio-frequency input signals fully enters main power amplifier and is amplified.When the power of radio-frequency input signals is more than or equal to preset input power, main power amplifier and auxiliary power amplifier are amplified to the radio-frequency input signals of input.Due to when the power of radio-frequency input signals is less than preset input power, main power amplifier is matching good state in load impedance, almost without echo, the now gain of Doherty power amplifier subtracts the Insertion Loss of circulator and power reflection device for the gain of main power amplifier, when power reflection device is limiter, because the Insertion Loss of circulator and limiter is very small, typically in below 0.2dB, therefore compared with prior art, if in the case of same driving power amplifier, improve gain and the power amplification efficiency of Doherty power amplifiers, simulation result shows, the at least high 3dB of gain of the traditional Doherty power amplifier of the ratio of gains for the Doherty power amplifier that this implementation is provided.When the power of radio-frequency input signals is more than or equal to preset input power, power reflection device and circulator is employed to adjust the radio-frequency input signals into main power amplifier and peak power amplifier, gain and the power amplification efficiency of Doherty power amplifier are improved, so as to also improve gain and the power amplification efficiency of whole power amplifier module.
Understand the RF power amplification processing method that the present embodiment is provided in order to clearer, Fig. 3 B are coordinated to be introduced herein, the circuit diagram for the Doherty power amplifier for realizing RF power amplification processing method that Fig. 3 B are provided by the embodiment of the present invention three, reference picture 3B, the radio-frequency power input 301 of Doherty power amplifier is connected with the first end of the circulator 302 in Doherty power amplifier, second end of circulator 302 is connected with the input of main power amplifier 303, 3rd end of circulator 302 is connected with the input of auxiliary power amplifier 304, the detection signal input part of wave detector 305 is inputted with radio-frequency power
End 301 is connected, the testing result output end of wave detector 305 is connected with the control end of power reflection device 306, one end ground connection of power reflection device 306 and the path connection between the control end of power reflection device 306 and the second end of circulator 302 and main power amplifier 303.
Specifically, it is connected by the detection signal input part of wave detector 305 with radio-frequency power input 301, wave detector 305 can detect the power of the radio-frequency input signals of the radio-frequency power input 301 of Doherty power amplifier, when the power that wave detector 305 detects radio-frequency input signals is less than preset input power, power reflection device 306 does not start work, the first end that radio-frequency input signals passes through circulator 302, main power amplifier 303 is fully entered with the second end to be amplified, main power amplifier 303 is to exporting radio-frequency power by 90 degree of phase-shift lines after radio-frequency input signals processing.When the power that wave detector 305 detects radio-frequency input signals is more than or equal to preset input power, power reflection device 306 starts work, the first end that radio-frequency input signals passes through circulator 302, second end of circulator 302 is input to main power amplifier 303 and power reflection device 306, the power reflection and reflection power of radio-frequency input signals are input to auxiliary power amplifier 304 by power reflection device 306 by the second end of circulator 302 and the 3rd end-fire frequency, the reflection power of input is amplified by auxiliary power amplifier 304, the radio-frequency input signals that main power amplifier 303 will enter into main power amplifier 303 is amplified, reflection power after main power amplifier 303 is handled the radio-frequency power and auxiliary power amplifier 304 that are exported after radio-frequency input signals processing after 90 degree of phase-shift lines is exported by radio-frequency power output end.
The configuration diagram for the Doherty power amplifier that Fig. 4 is provided by the embodiment of the present invention four.In the present embodiment, Doherty power amplifier includes：Main power amplifier 401 and auxiliary power amplifier 402, detection circuit 403 and control circuit 404.
Wherein, detection circuit 403 is used for the watt level for detecting the radio-frequency input signals of Doherty power amplifier；If the power that controlling circuit 404 is used for radio-frequency input signals is less than preset input power, control radio-frequency input signals fully enters the main power amplifier of Doherty power amplifier；If the power of radio-frequency input signals is more than or equal to preset input power, control radio-frequency input signals inputs the main power amplifier and auxiliary power amplifier of Doherty power amplifier, and preset input power is determined according to the pulling figure of main power amplifier.
The Doherty power amplifier that the present embodiment is provided, by the watt level for judging radio-frequency input signals, when the power of radio-frequency input signals is less than predetermined power, whole radio-frequency input signals enters main power amplifier and is amplified processing, solve in the prior art when the power of radio-frequency input signals is less than predetermined power, because a part of radio-frequency input signals enters auxiliary power amplifier, auxiliary power amplifier
Again do not work cause Doherty power amplifier power amplification efficiency it is low the problem of, improve the power amplification efficiency of Doherty power amplifier.
The configuration diagram for the Doherty power amplifier that Fig. 5 is provided by the embodiment of the present invention five.The present embodiment is further optimized based on above-mentioned example IV, and reference picture 5, the Doherty power amplifier of the present embodiment includes：Main power amplifier 501 and auxiliary power amplifier 502, wave detector 503, power reflection device 504 and circulator 505.
Wherein, power reflection device can be limiter or varactor.Annexation between main power amplifier 501, auxiliary power amplifier 502, wave detector 503, power reflection device 504 and circulator 505 is as follows：The radio-frequency power input of Doherty power amplifier is connected with the first end of the circulator 505 in Doherty power amplifier, second end of circulator 505 is connected with the input of main power amplifier 501, 3rd end of circulator 505 is connected with the input of auxiliary power amplifier 502, the detection signal input part of wave detector 503 is connected with radio-frequency power input, the testing result output end of wave detector 503 is connected with the control end of power reflection device 504, one end ground connection of power reflection device 504 and the path connection between the control end of power reflection device 504 and the second end of circulator 505 and main power amplifier 501.
The Doherty power amplifier that the present embodiment is provided, by using the small circulator of Insertion Loss, and connect the first end of radio-frequency power input and circulator, second end of circulator is connected with the input of main power amplifier, 3rd end of circulator and the input of auxiliary power amplifier are connected, so as to realize when wave detector detects that the power of radio-frequency input signals is less than preset input power, whole radio-frequency input signals can be by the first end of circulator, second end of circulator inputs main power amplifier, improve power amplification efficiency and the gain of Doherty power amplifiers.When wave detector detects that the power of radio-frequency input signals is more than or equal to preset input power, the power reflected by power reflection device can input auxiliary power amplifier by the second end of circulator, the 3rd end of circulator, auxiliary power amplifier is promoted to carry out load balance factor, improve the combining power output of main power amplifier and auxiliary power amplifier, so as to improve gain and the power amplification efficiency of Doherty power amplifier, so as to also improve gain and the power amplification efficiency of whole power amplifier module.
Further, the number of auxiliary power amplifier can be at least two, when there is two peak power amplifiers in Doherty power amplifier, the configuration diagram of Doherty power amplifier is as shown in fig. 6, the configuration diagram for the multichannel Doherty power amplifier that Fig. 6 is provided by the embodiment of the present invention six.Reference picture 6, Fig. 6 is substantially similar with Fig. 5, difference with Fig. 5 is, it can be connected at the 3rd end of circulator 505 with the input of two auxiliary power amplifiers, need exist for explanation be, number of the present invention not to the auxiliary power amplifier of the three-terminal link of circulator is limited, i.e., auxiliary power amplifies
The number of device can be adjusted according to actual conditions, only be illustrated herein with two auxiliary power amplifiers of three-terminal link in circulator 505.The reflection power reflected from power reflection device 504 can make one of peak power amplifier startup work, carry out load balance factor.Can also be according to actual conditions, i.e. when the peak power exported from radio-frequency power output end, which can not be met, to be actually needed, it can start peak power amplifier 502 by adjusting preset input power and peak power amplifier 502' work, carry out load balance factor.The operation principle of the multichannel Doherty power amplifier is similar with technique effect with the operation principle of the Doherty power amplifier shown in Fig. 5 with technique effect, and here is omitted.
It should be noted that the embodiment of the present invention also provides a kind of wireless transmitting-receiving equipments, the wireless transmitting-receiving equipments can be user equipment, base station or trunking.The radio circuit of the wireless transmitting-receiving equipments can include any one Doherty power amplifier mentioned in above-described embodiment.The Doherty power amplifier can be used for performing the method and technology scheme in Fig. 1 3A shown in any embodiment, and its implementing principle and technical effect is similar, and here is omitted.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although the present invention is described in detail with reference to foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part or all technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the scope of various embodiments of the present invention technical scheme.
Claims (9)
- Claim1st, a kind of RF power amplification processing method, it is characterised in that including：Detect the watt level of the radio-frequency input signals of doherty Doherty power amplifier；If the power of the radio-frequency input signals is less than preset input power, the radio-frequency input signals is controlled to fully enter the main power amplifier of the Doherty power amplifier；If the power of the radio-frequency input signals is more than or equal to preset input power, the radio-frequency input signals is controlled to input the main power amplifier and auxiliary power amplifier of the Doherty power amplifier；Wherein, the preset input power is determined according to the pulling figure of the main power amplifier.2nd, according to the method described in claim 1, it is characterised in that it is described detection Doherty power amplifier radio-frequency input signals power size, including：The size of the power of the radio-frequency input signals of Doherty power amplifier described in detection electric circuit inspection in the Doherty power amplifier；If the power of the radio-frequency input signals is less than preset input power, the radio-frequency input signals is controlled to fully enter the main power amplifier of the Doherty power amplifier, including：If the main power amplifier that the control circuit that the power of radio-frequency input signals described in the detection electric circuit inspection is less than in preset input power, the Doherty power amplifiers controls the radio-frequency input signals to fully enter the Doherty power amplifier；If the power of the radio-frequency input signals is more than or equal to preset input power, the radio-frequency input signals is controlled to input the main power amplifier and auxiliary power amplifier of the Doherty power amplifier, including：If the control circuit that the power of radio-frequency input signals described in the detection electric circuit inspection is more than or equal in preset input power, the Doherty power amplifier controls the radio-frequency input signals to shunt the main power amplifier and auxiliary power amplifier for being input to the Doherty power amplifier.3rd, method according to claim 2, it is characterised in that the detection circuit is wave detector, it is described to control circuit to be power reflection device；The radio-frequency power input of the Doherty power amplifier is connected with the first end of the circulator in the Doherty power amplifier, second end of the circulator is connected with the input of the main power amplifier, 3rd end of the circulator is connected with the input of the auxiliary power amplifier, the detection signal input part of the wave detector is connected with the radio-frequency power input, the testing result output end of the wave detector is connected with the control end of the power reflection device, one end ground connection of the power reflection device and the work( Path connection between the second end and the main power amplifier of the control end of rate reflector and the circulator；The size of the power of the radio-frequency input signals of Doherty power amplifier described in detection electric circuit inspection in the Doherty power amplifier, including：The wave detector detects the size of the power of the radio-frequency input signals of the Doherty power amplifier；If the power of radio-frequency input signals is less than preset input power described in the detection electric circuit inspection, then the control circuit control radio-frequency input signals in the Doherty power amplifier fully enters the main power amplifier of the Doherty power amplifier, including：If the wave detector detects that the power of the radio-frequency input signals is less than preset input power, then the power reflection device does not start work according to the signal of the control end, and the radio-frequency input signals fully enters the main power amplifier by the first end of the circulator, the second end of the circulator；If the power of radio-frequency input signals is more than or equal to preset input power described in the detection electric circuit inspection, then the control circuit in the Doherty power amplifier controls the radio-frequency input signals to shunt the main power amplifier and auxiliary power amplifier for being input to the Doherty power amplifier, including：If the wave detector detects that the power of the radio-frequency input signals is more than or equal to preset input power, then the power reflection device works according to the signal enabling of the control end, the radio-frequency input signals is input to the main power amplifier and the power reflection device by the first end of the circulator, the second end of the circulator, and the power reflection and reflection power of input signal are input to the auxiliary power amplifier by the power reflection device by the second end of the circulator, the 3rd end of the circulator.4th, method according to claim 3, it is characterised in that the power reflection device is limiter or varactor.5th, a kind of Doherty power amplifier, it is characterised in that including：Main power amplifier and auxiliary power amplifier, detection circuit and control circuit；The detection circuit, the watt level of the radio-frequency input signals for detecting the Doherty power amplifier；The control circuit, if the power for the radio-frequency input signals is less than preset input power, controls the radio-frequency input signals to fully enter the main power amplifier of the Doherty power amplifier；If the power of the radio-frequency input signals is more than or equal to preset input power, the radio-frequency input signals is controlled to input the main power amplifier and auxiliary power amplifier of the Doherty power amplifier；Wherein, the preset input power is determined according to the pulling figure of the main power amplifier. 6th, Doherty power amplifier according to claim 5, it is characterised in that the detection circuit is wave detector, described to control circuit for power reflection device, the radio-frequency power amplifier, in addition to:Circulator；The radio-frequency power input of the Doherty power amplifier is connected with the first end of the circulator in the Doherty power amplifier, second end of the circulator is connected with the input of the main power amplifier, 3rd end of the circulator is connected with the input of the auxiliary power amplifier, the detection signal input part of the wave detector is connected with the radio-frequency power input, the testing result output end of the wave detector is connected with the control end of the power reflection device, one end ground connection of the power reflection device and the path connection between the control end of the power reflection device and the second end of the circulator and the main power amplifier.7th, Doherty power amplifier according to claim 6, it is characterised in that the power reflection device is limiter or varactor.8th, the Doherty power amplifier according to any one of claim 57, it is characterised in that the number of the auxiliary power amplifier is at least two.9th, a kind of wireless transmitting-receiving equipments, it is characterised in that the radio circuit of the wireless transmitting-receiving equipments includes the Doherty power amplifier any one of claim 58.10th, wireless transmitting-receiving equipments according to claim 9, it is characterised in that the equipment includes:User equipment, base station, trunking.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/083554 WO2015035643A1 (en) | 2013-09-16 | 2013-09-16 | Radio frequency power amplifier processing method, doherty power amplifier and wireless transceiver device |
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| CN105229922A true CN105229922A (en) | 2016-01-06 |
| CN105229922B CN105229922B (en) | 2018-01-09 |
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| CN201380076710.6A Active CN105229922B (en) | 2013-09-16 | 2013-09-16 | RF power amplification processing method, Doherty power amplifier and wireless transmitting-receiving equipments |
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| CN (1) | CN105229922B (en) |
| WO (1) | WO2015035643A1 (en) |
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| CN113810023A (en) * | 2021-08-31 | 2021-12-17 | 电子科技大学 | Impedance modulation system and method of digital power transmitting chip |
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| CN110011721B (en) * | 2019-03-29 | 2021-07-16 | 睿高(广州)通信技术有限公司 | Power amplifier equipment and power amplifier system in satellite communication system |
| CN110504924B (en) * | 2019-07-19 | 2020-09-25 | 南京国博电子有限公司 | Doherty power amplifier and input signal processing method thereof |
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Also Published As
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| CN105229922B (en) | 2018-01-09 |
| WO2015035643A1 (en) | 2015-03-19 |
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