WO2002039601A2 - Method for producing a radio unit and radio unit - Google Patents
Method for producing a radio unit and radio unit Download PDFInfo
- Publication number
- WO2002039601A2 WO2002039601A2 PCT/EP2001/012625 EP0112625W WO0239601A2 WO 2002039601 A2 WO2002039601 A2 WO 2002039601A2 EP 0112625 W EP0112625 W EP 0112625W WO 0239601 A2 WO0239601 A2 WO 0239601A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- transmitter
- receiver part
- radio unit
- impedance
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means
Definitions
- the subject matter of the invention relates to a method for producing a radio unit and to a radio unit.
- Radio units such as cell phones, increasingly have antennas that are integrated in a small space in a plastic housing.
- a typical installation location for such integrated antennas is the back of the device board.
- planar antennas are advantageous because they require little space.
- An antenna has at least one supply connection which is electrically connected to the transmitter and / or receiver part.
- the input impedance can be determined by the position of the feed point on the antenna.
- the antenna In a so-called ⁇ / 2 radiator, the antenna must be designed in such a way that the resonant length corresponds approximately to half the wavelength at the desired operating frequency.
- the antenna is additionally connected to the electrical ground of the transmitter and / or receiver part in the so-called ⁇ / 4 radiator.
- the antenna assumes a defined position relative to the device board after installation.
- a defined position has so far either been realized using additional plastic support elements or the antenna itself has been removed a metallized plastic or ceramic block, which was applied to the device board.
- the input sensitivity of the circuit is measured, which is done by feeding a signal at the input of the RF circuit and reducing the level until the bit error rate at the output of the RF circuit reaches a certain limit.
- Automatic production in which the HF circuit is equipped with an antenna before the test measurement, has not been possible until now. For this reason, the antenna is usually only assembled during production after the RF circuit has been completely measured. A separate manufacturing process is required, in which the antenna (often by hand) is soldered or plugged in.
- the object of the present invention is to specify a method with which a radio unit with an antenna and a transmitter and / or receiver part can be produced without additional means for interrupting the electrical connection between the antenna and the transmitter and / Receiver part or supporting elements of the antenna are necessary.
- Another one The aim of the invention is to provide a radio unit which is manufactured using the above-mentioned driving method.
- an antenna in particular a planar antenna, is first connected electrically and mechanically to a transmitter and / or receiver part, preferably to its printed circuit board, and the impedance of the antenna in one for the Transmitting and / or receiving radio signals relevant frequency range temporarily compensated.
- the transmitter and / or receiver part is then tested, in particular its limit sensitivity being determined.
- the advantage of this method is that the antenna is both mechanically fixed and electrically connected to the transmitter and / or receiver part, so that the step of retrofitting the antenna and / or the use of an additional component such as a switch is unnecessary ,
- the retroactive influence of the antenna on the HF circuit is avoided by compensating for the impedance of the antenna and the test measurement of the HF circuit can be carried out after the antenna and transmitter and / or receiver part have been assembled.
- the antenna and at least one support element carrying the antenna are made from one part.
- the antenna and the support element are preferably produced from a sheet metal by a stamping / bending process.
- the antenna is connected to the electrical ground of the transmitter and / or receiver part at at least one contact point.
- the advantage of such a ⁇ / 4 radiator over the ⁇ / 2 radiator is that the antenna requires less space.
- the impedance of the antenna is compensated for by connecting the antenna to the electrical ground of the transmitter and / or receiver part at at least one contact point.
- This can be done by simple electrical bridging by means of a short-circuit device, for which contact points are suitably provided on the antenna and on the transmitter and / or receiver part.
- the short circuit essentially has two functions: on the one hand it detunes the resonance frequency of the antenna so that no more interference radiation is received, and on the other hand - from an electrical point of view - it generates an open circuit at the antenna feed contact.
- this short circuit can be realized by a suitable device, in which resilient pins contact special receiving holes on the antenna and device board. The correct position of the short circuit on the antenna can be determined by test measurement of the input impedance.
- the impedance of the antenna is compensated by bringing at least one compensation antenna in the vicinity of the antenna, and the compensation antenna is electrically contacted with the transmitter and / or receiver part and / or the antenna such that the electromagnetic field of the Compensation antenna is canceled by the electromagnetic field of the antenna.
- the transmission or reception of signals from the antenna is avoided by the compensation antenna, since cancel the effect of the antenna and the compensation antenna with opposite polarity.
- the impedance of the antenna is compensated by making electrical contact with the transmitter and / or receiver part and / or the antenna with a compensator circuit, the frequency-dependent impedance of the compensator circuit being opposite to the frequency-dependent impedance of the antenna.
- the behavior of the antenna is thus simulated by an electrical circuit. So that interference radiation from outside does not influence the sensitivity measurement, it is proposed that the measurement be carried out in an electromagnetic shielded room (Faraday cage) when using a compensator circuit.
- a radio unit according to the invention in particular manufactured according to the method according to the invention, comprises a transmitter and / or receiver part and an antenna, in particular a planar antenna, the antenna and at least one support element being made from one piece and the support element providing an electrical connection and / or represents a mechanically stable connection with the transmitting and / or receiving part. It is advantageous here that the support element and the antenna consist of one piece, so that there are no further components which ensure a mechanical or electrical connection of the antenna to the transmitting and / or receiving part.
- the antenna is soldered directly to the transmitter and / or receiver part. Soldering avoids contact resistances, such as those that can result from corrosion or contamination of the contact surfaces in a switch.
- the transmitter and / or receiver part is applied to a printed circuit board.
- the printed circuit board and antenna thus form a compact, mechanically strong and robust module that has optimal electrical and radiative properties.
- the transmitter and / or receiver part or the antenna are provided with contact points which are used for external electrical contacting, for example with the short-circuit device, the compensator circuit, the compensation antenna or the test device.
- the radio unit is characterized in an advantageous manner in that the transmitter and / or receiver part can be equipped with an antenna automatically in a processing operation with other components, so that the subsequent assembly after the test measurement of the transmitter and / or receiver part is omitted and Costs can be saved.
- the radio unit has the advantage that the antenna and its at least one support element are made in one piece, so that the manufacturing process is simplified here too.
- FIG. 1 shows an embodiment of a planar antenna mounted on a printed circuit board together with a short-circuiting device
- FIG. 2 shows a planar antenna, in the vicinity of which a compensation antenna is brought;
- 3 shows a planar antenna with a transmitter and / or receiver part or a compensator circuit;
- Fig. 4 is a planar antenna which is provided with an additional electrical ground connection.
- Figure 1 shows a planar antenna 2, which is soldered onto a printed circuit board 6 with its support elements 3.
- the support elements 3 keep the antenna 2 at a defined distance from the printed circuit board 6 or the transmitter and / or receiver part 1.
- the feed connection 12 coming from the transmitter and / or receiver part 1 is contacted with the antenna 2 via an electrically conductive support element 3.
- the antenna 2 is electrically connected to the electrical ground 11 on the printed circuit board 6 by means of the short-circuiting device 7.
- resilient pins and receiving bores are advantageous for assured reproducibility.
- flat contact points 4 made of corrosion-resistant material are proposed
- FIG. 2 shows schematically the antenna 2 and a compensation antenna 8, which are connected in opposite directions to the transmitter and / or receiver part 1, so that the radiation emitted by the antenna 2 can be immediately absorbed by the compensation antenna 8 and is electrically short-circuited. It is important here that the antennas 2, 8 are close together, the distance between the two antennas 2, 8 being smaller than the wavelength of the emitted electromagnetic radiation. It would also be conceivable to mount the feed connections 12 of the respective antennas 2, 8 not on the opposite side but on the same side, but then a phase shifter between the transmitter and / or receiver part 1 and the compensation adapter Tenne 8 is necessary so that the phase of the radiated field of the compensation antenna 8 is shifted by 180 ° relative to the antenna 2.
- Figure 3 shows a transmitter and / or receiver part 1, which is connected to an antenna 2 and a compensator circuit 9, the Ko pensatorscnies 9 electrically simulates the electrical behavior of the antenna 2 and is canceled by opposite polarity.
- the Ko pensatorscnies 9 electrically simulates the electrical behavior of the antenna 2 and is canceled by opposite polarity.
- a Faraday cage 13 is advantageous, which shields the entire measuring apparatus from interfering radiation.
- FIG. 4 shows a planar antenna 2 with four support elements 3, two support elements 3 serving as electrical contacts on the one hand as a feed connection 12 and on the other hand as an electrical ground 11.
- the support elements 3 are soldered onto the printed circuit board 6.
- the advantage of connecting the antenna 2 to an electrical ground 11 is that the antenna 2 thus becomes a ⁇ / 4 radiator which is half the size of a ⁇ / 2 radiator without an electrical ground connection.
- the invention is particularly suitable for the automated and inexpensive manufacture of radio units, in which the step of electrically connecting the antenna 2 to the transmitter and / or receiver part 1 after the test measurement is omitted, and the use of an additional component, such as an electrical switch, is superfluous becomes. This results in a higher rationalization and the manufacturing costs for a radio unit are reduced. LIST OF REFERENCE NUMBERS
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002215990A AU2002215990A1 (en) | 2000-11-08 | 2001-10-31 | Method for producing a radio unit and radio unit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10055266.8 | 2000-11-08 | ||
DE10055266A DE10055266B4 (en) | 2000-11-08 | 2000-11-08 | Method of making a radio and radio |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002039601A2 true WO2002039601A2 (en) | 2002-05-16 |
WO2002039601A3 WO2002039601A3 (en) | 2002-11-14 |
Family
ID=7662515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/012625 WO2002039601A2 (en) | 2000-11-08 | 2001-10-31 | Method for producing a radio unit and radio unit |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2002215990A1 (en) |
DE (1) | DE10055266B4 (en) |
WO (1) | WO2002039601A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1511117A1 (en) * | 2003-08-28 | 2005-03-02 | Siemens Aktiengesellschaft | Antenna system and transmitting device with such an antenna |
JP3814271B2 (en) * | 2003-11-10 | 2006-08-23 | アルプス電気株式会社 | Antenna device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0707354A1 (en) * | 1994-10-11 | 1996-04-17 | Murata Manufacturing Co., Ltd. | Antenna device |
US5832372A (en) * | 1995-09-25 | 1998-11-03 | Nokia Mobile Phones Limited | Antenna assembly for a radio transceiver |
-
2000
- 2000-11-08 DE DE10055266A patent/DE10055266B4/en not_active Expired - Fee Related
-
2001
- 2001-10-31 WO PCT/EP2001/012625 patent/WO2002039601A2/en active Application Filing
- 2001-10-31 AU AU2002215990A patent/AU2002215990A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0707354A1 (en) * | 1994-10-11 | 1996-04-17 | Murata Manufacturing Co., Ltd. | Antenna device |
US5832372A (en) * | 1995-09-25 | 1998-11-03 | Nokia Mobile Phones Limited | Antenna assembly for a radio transceiver |
Also Published As
Publication number | Publication date |
---|---|
AU2002215990A1 (en) | 2002-05-21 |
WO2002039601A3 (en) | 2002-11-14 |
DE10055266A1 (en) | 2002-05-29 |
DE10055266B4 (en) | 2005-03-03 |
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