|Número de publicación||US3683376 A|
|Tipo de publicación||Concesión|
|Fecha de publicación||8 Ago 1972|
|Fecha de presentación||12 Oct 1970|
|Fecha de prioridad||12 Oct 1970|
|Número de publicación||US 3683376 A, US 3683376A, US-A-3683376, US3683376 A, US3683376A|
|Inventores||Pronovost Joseph J O|
|Cesionario original||Pronovost Joseph J O|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (3), Citada por (109), Clasificaciones (10)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
United States Patent Pronovost 1 Aug. 8, 1972  RADAR ANTENNA MOUNT 2,636,122 4/1953 Hayes ..343/747  Inventor: Joseph L Pronovost 48 3,237,191 2/1966 BOjkO ..343/5 PD Birchbank Rd., Bramalea, Ontario, Canada Primary ExammerSamuel Felnberg Attorney-Peter Kirby, Charles P. Curphey and Norris  Filed: Oct. 12, 1970 M. Eades 1 l. .1 ,7 [2 1 APP 79 91 57 ABSTRACT  U S Cl 343/5 PD 343/702 343/747 In a short range radar detection device for burglar and 343/805 343/906; like intrusion protection, operating on the doppler Int Cl 9/00 principle of detecting a frequency shift caused by a Fie'ld 805 906 moving object, the mounting of the antenna provides  References Cited UNITED STATES PATENTS 2,269,947 l/1942 Ludwig ..343/906 structural rigidity and at the same time automatically furnishes the capacitances between the antenna, ground and an inductor, that are required for tuning the antenna system.
6 Claims, 6 Drawing Figures PATENTEU 3 3,683, 376
sum 2 or 3 Ill IIIIIIIIII H F5 7 I PATENTEDAUB 8 m2 3.683.376 SHEET 3 [IF 3 RADAR ANTENNA MOUNT This invention relates to a manner of mounting an antenna in a radar device.
More specifically, it relates to a manner of mounting an antenna in which the structural elements serve simultaneously to provide the capacitances between the antenna, ground and an inductor that are required for tuning the antenna system.
In the description that follows, the invention is exemplified as applied to a short range radar detection device for detecting the movementof objects in its vicinity. The device operates on the doppler principle of detecting signals returned by moving objects at a slightly different frequency from that of the transmitted signal. Stationary objects are not detected.
While the device can be employed for any type of surveillance duty, the particular purpose for which it has been developed is as an alarm device for the detection of burglars or other intruders into the area under surveillance, e.g. a shop, warehouse or private home.
Devices of this general type are already known, but they suffer from the disadvantage that they are complex and expensive, and consequently beyond the financial reach of many persons, especially private citizens.
An object of the present invention is to provide an antenna mount that will render a device of this character so simple in construction that it can be mass produced and sold at a price well within a range that would willingly be paid by individual house and apartment dwellers in return for improved security, e.g. a cost of up to about $100.
A further object of the invention is to achieve a device that can be made for this low price without sacrifice of efficiency and reliability of operation.
Further objects and features of the invention will become apparent from the following description which, together with the accompanying drawings, illustrates one embodiment of the invention.
While the antenna mount is herein shown and described in association with a specific form of radar device, it is to be understood that the mount may be employed with devices that differ in other aspects of their circuits and constructions. Thus the illustrated embodiment is shown by way of example only, and not by way of limitation of the broad scope of the invention, which latter is defined in the appended claims.
In the drawings:
FIG. 1 is a small scale, perspective view of a radar device;
FIG. 2 is the electrical circuit of the device of FIG. 1, shown diagrammatically;
FIG. 3 is a larger scale, broken away side view of an antenna mount employed in the device of FIG. 1;
FIG. 4 is a section on lV-lV in FIG. 3;
FIG. 5 is a further enlarged fragment of FIG. 3; and
FIG 6 is an exploded version of FIG. 5.
As shown in FIG. 2, an oscillator 10, e.g. 400MI-IZ, drives a tank circuit Ll, C1, the inductor L1 of which is loosely inductively coupled with another loop inductor L2, the two ends l6, 17 of which are connected to respective arms 11 of a rabbit ears, half wave dipole antenna. The arms 11 are mounted in an antenna mounting member 12 secured to the top of a casing 13 in which the other components including a key operated switch 14 are housed. Due to the simplicity of the device, the casing 13 can be small, e.g. about 6 inches long, 3 inches deep and 2 inches high, i.e. about the size of a small radio receiver. It can readily be located in the area to be surveyed without occupying any appreciate space. The components are operated from a battery 9, so that the device is independent of any power supply, although a battery charger can be included as an extra component. Since the device operates with radar frequency waves, its signals penetrate wood and most other materials including thin walls; it can thus be mounted out of sight in a cupboard or other concealed location.
The center point 15 of the inductor L2 is connected to ground (casing) and hence to the member 12 which is of metal, preferably aluminum. The connections of the inductor ends 16, 17 to the antenna arms 11 are not direct, but through capacitances C2 and C3. These series capacitances, which, at the frequency employed, exhibit very low impedances, are not separate electrical components, but are built into the structure of the antenna mount, as is described in detail below.
In a similar fashion, the antenna arms 11 are physically mounted so as to have capacitances to ground represented by C4 and C5, these shunt capacitances exhibiting relatively high impedances at the frequency employed. For example, capacitances C2, C3 could each be about 20 pico farad; and capacitances C4, C5 each about 0.1 pico farad. The capacitances C2 to C5 together with the inductor L2 form a network tuned to the oscillator frequency. While the tuning is not so sharp that the doppler shifted frequencies are eliminated, this network does serve to filter out extraneous signals of other frequencies, as may arise from adjacent electrical equipment, e.g. motors, or from lightning.
Signals at 400MHZ reflected back to the antenna and shifted on frequency by a moving object, e.g. a shift of the order of 0.1 to lOI-IZ, will beat with the base frequency to produce the low difference frequency. This low frequency is recovered by demodulating the high frequency, using diodes D1 and D2 connected between points 16, 17 and a point 18, and providing full wave rectification. Since the tank circuit L1, C1 presents a low impedance to the beat frequency, the loose coupling between inductors L1 and L2 is necessary. A capacitor C6 filters out high frequency signals, the beat frequency entering a low frequency amplifier 19. The gain of the amplifier 19 can be varied to determine the range of the device. Typically, with full gain, there has been found to be no difficulty in obtaining a range radius of 20 feet around the device, using an oscillator of 10 milliwatts at low gain this radius can be reduced to the order of about 5 feet. The height of the space effectively covered by the radar field will be typically about half the range.
The output of the amplifier 19 energizes a trigger and timer circuit 20 which causes continuous operation of a born 21 or other alarm mechanism for a predetermined period, e.g. 2 minutes, whereupon the circuit resets itself. When the device is tumed on by the owner using his key in switch 14, his own subsequent movement away from the device will actuate the trigger and timer circuit 20 to sound the born 21 for 2 minutes. This action will provide a test that the device is functioning properly. After the 2 minutes have elapsed, the device will again become silent, when the trigger and timer circuit 20 resets itself, assuming that the owner has by now moved out of range and that no other moving objects are within range to reenergize the amplifier 19.
When an intruder or other moving object appears, the horn will sound for 2 minutes, which may in itself be sufficient time to achieve the desired result, i.e. to scare away the intruder and/or to alert the householder, superintendent or night watchman. By switching off its horn after 2 minutes, the device again becomes ready to detect a new intrusion. Of course, if any moving intrusion persists, the horn will continue, the 2 minutes duration of the horn being timed not from its initial actuation but from the last energization of the circuit 20 by the amplifier 19.
If desired, as an optional feature, one or more other alarm mechanisms may be connected to the device, e. g. a siren or bell external to the premises, floodlights, or a police switchboard indicator. This other alarm mechanism has been shown diagrammatically in FIG. 2 at 22 and can be actuated by a trigger 23 energized through a delay device 24 from the amplifier 19. A short delay, e.g. 30 seconds or perhaps 1 minute, furnished by the device 24 will enable the owner to approach the alarm device to turn it on and off. Under these conditions he will operate the horn 21, but he will not trigger the other alarm mechanism 22. In the case of turning off, the key switch 14 will be opened, before the delay period has expired; in the case of turning on, the owner will have moved beyond range, so that the amplifier 19 will no longer be ready to energize the trigger 23 when the delay period expires.
The manner of securing each of the antenna arms 1 1 in the mounting member 12 to achieve simultaneously the necessary structural and electrical characteristics, is best seen from FIGS. and 6. A metal bolt 30 extends through a number of parts and finally into a tapped cavity 31 in the end of the arm 11. in sequence, starting at its head, the threaded shaft of the bolt 30 passes through a dielectric insulating washer 32, having a boss portion 33; a metallic conductor in the form of a lug 34 mounted on an end of the inductor L2 and having a hole 35 sized to receive the boss portion 33; a dielectric insulating washer 36; a metallic washer 37; a nut 38; a dielectric insulating washer 39; the wall of the member 12; a further dielectric insulating washer 40; a second nut 41; and finally the arm 11. The sides of the washers 39, 40 facing the member 12 are recessed to form boss portions 42, 43 that enter the hole in the member 12 and establish a firm structural connection therewith.
The first or series capacitances C2, C3 are each formed between the lug 34 on the one hand, and the bolt 30 and metallic washer 37 on the other hand, these latter parts being in direct metallic connection with the arm 11. These capacitances are comparatively large by virtue of the thinness of the dimension A of the dielectric washer 36, eg 4 thousandths of an inch, and the thinness of the radial dimension B of the boss 33 of the dielectric washer 32, also about 4 thousandths.
The second or shunt capacitances C4, C5 are each formed between the nuts 38, 41 and bolt 30 on the one hand, and the grounded mounting member 12 on the other hand. These capacitances are comparatively small by virtue of the much greater values chosen for the dimensions C and D.
An important attribute of the system as described is an absence of elements in the tuning circuits that are dependent on temperature and other variables such as humidity. This feature contributes significantly to the operating stability of the system.
,As an alternative to using a bolt 30 with a head, a head-less bolt can be used, threaded at least at both ends. The head will then be replaced by a nut that can be screwed onto one end of the bolt, the other end entering the tapped cavity 31.
1. An antenna mount comprising a. an antenna in the form of at least one metallic arm,
b. a grounded metallic mounting member for supporting said arm,
c. an electrical conductor for capacitive coupling to said arm,
d. and means mechanically connecting said arm to the mounting member and to the conductor,
e. said connecting means comprising i. a metallic bolt having a head or nut at one end and a threaded shaft extending therefrom through a hole in said conductor and then through a hole in said mounting member into a tapped cavity in said arm,
ii. a pair of metallic nuts engaging the threaded shaft of the bolt, one on each side of the mounting member,
iii. a metallic washer on the bolt between said conductor and the nut nearer the bolt head,
iv. first dielectric insulating means located between the bolt and the washer on the one hand, and said conductor on the other hand, to form a first capacitance between the antenna arm and said conductor,
v. second dielectric insulating means located between the two nuts and the bolt shaft on the one hand, and the mounting member on the other hand, to form a second capacitance between the antenna arm and the mounting member,
vi. said first and second dielectric means being so dimensioned that the first capacitance is large compared to the second capacitance.
2. An antenna mount as claimed in claim 1, wherein said antenna comprises a pair of metallic arms arranged to form a half wave dipole, and wherein each said arm is mounted on said mounting member by a respective said connecting means (e).
3. The combination of an antenna mount according to claim 2, and radar transmission and receiving means comprising f. a first loop inductor having two ends each connected to a respective said electrical conductor, the center of said loop being grounded,
g. a second loop inductor loosely inductively coupled with said first inductor, said second inductor having two ends,
h. a capacitor connected across the ends of the second inductor to form a tank circuit therewith, and
i. a radar frequency oscillator connected to said tank circuit,
an alarm means upon receipt of a signal at said low frequency.
5. The combination of claim 4, including timing means for interrupting said alarm means after a predetermined time interval.
6. The combination of claim 5, including further alarm means and delay means connected thereto and to said means (k) whereby to trigger said further alarm means upon receipt of a signal at said low frequency sustained for a predetermined time interval.
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US2269947 *||26 Oct 1939||13 Ene 1942||Ward Products Corp||Antenna mounting|
|US2636122 *||28 Abr 1949||21 Abr 1953||Hayes Austin C||Antenna system|
|US3237191 *||28 May 1963||22 Feb 1966||Pinkerton S Inc||Object detection system|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US5331327 *||6 Ene 1993||19 Jul 1994||Brocia Robert W||Radar detector performance verification method and apparatus|
|US6480156 *||27 Mar 2001||12 Nov 2002||Hon Hai Precision Ind. Co., Ltd.||Inverted-F dipole antenna|
|US6580398 *||25 Oct 2001||17 Jun 2003||Star H Corporation||Low profile antenna|
|US6664930||9 Abr 2002||16 Dic 2003||Research In Motion Limited||Multiple-element antenna|
|US6781548||26 Oct 2001||24 Ago 2004||Research In Motion Limited||Electrically connected multi-feed antenna system|
|US6791500||12 Dic 2002||14 Sep 2004||Research In Motion Limited||Antenna with near-field radiation control|
|US6809692||17 Oct 2002||26 Oct 2004||Advanced Automotive Antennas, S.L.||Advanced multilevel antenna for motor vehicles|
|US6812897||17 Dic 2002||2 Nov 2004||Research In Motion Limited||Dual mode antenna system for radio transceiver|
|US6870507||1 Ago 2003||22 Mar 2005||Fractus S.A.||Miniature broadband ring-like microstrip patch antenna|
|US6876320||26 Nov 2002||5 Abr 2005||Fractus, S.A.||Anti-radar space-filling and/or multilevel chaff dispersers|
|US6891506||16 Jun 2003||10 May 2005||Research In Motion Limited||Multiple-element antenna with parasitic coupler|
|US6937191||23 Abr 2002||30 Ago 2005||Fractus, S.A.||Interlaced multiband antenna arrays|
|US6937206||15 Oct 2003||30 Ago 2005||Fractus, S.A.||Dual-band dual-polarized antenna array|
|US6950071||2 Jul 2003||27 Sep 2005||Research In Motion Limited||Multiple-element antenna|
|US6980173||24 Jul 2003||27 Dic 2005||Research In Motion Limited||Floating conductor pad for antenna performance stabilization and noise reduction|
|US7015868||12 Oct 2004||21 Mar 2006||Fractus, S.A.||Multilevel Antennae|
|US7023387||13 May 2004||4 Abr 2006||Research In Motion Limited||Antenna with multiple-band patch and slot structures|
|US7123208||8 Abr 2005||17 Oct 2006||Fractus, S.A.||Multilevel antennae|
|US7148846||9 Jun 2004||12 Dic 2006||Research In Motion Limited||Multiple-element antenna with floating antenna element|
|US7148850||20 Abr 2005||12 Dic 2006||Fractus, S.A.||Space-filling miniature antennas|
|US7164386||16 Jun 2005||16 Ene 2007||Fractus, S.A.||Space-filling miniature antennas|
|US7183984||5 May 2005||27 Feb 2007||Research In Motion Limited||Multiple-element antenna with parasitic coupler|
|US7202818||13 Abr 2004||10 Abr 2007||Fractus, S.A.||Multifrequency microstrip patch antenna with parasitic coupled elements|
|US7202822||12 Jul 2005||10 Abr 2007||Fractus, S.A.||Space-filling miniature antennas|
|US7215287||13 Abr 2004||8 May 2007||Fractus S.A.||Multiband antenna|
|US7245196||19 Ene 2000||17 Jul 2007||Fractus, S.A.||Fractal and space-filling transmission lines, resonators, filters and passive network elements|
|US7250918||12 Nov 2004||31 Jul 2007||Fractus, S.A.||Interlaced multiband antenna arrays|
|US7253775||14 Sep 2004||7 Ago 2007||Research In Motion Limited||Antenna with near-field radiation control|
|US7256741||1 Feb 2006||14 Ago 2007||Research In Motion Limited||Antenna with multiple-band patch and slot structures|
|US7312762||13 Abr 2004||25 Dic 2007||Fractus, S.A.||Loaded antenna|
|US7369089||13 Jul 2007||6 May 2008||Research In Motion Limited||Antenna with multiple-band patch and slot structures|
|US7394432||17 Oct 2006||1 Jul 2008||Fractus, S.A.||Multilevel antenna|
|US7397431||12 Jul 2005||8 Jul 2008||Fractus, S.A.||Multilevel antennae|
|US7400300||31 Oct 2006||15 Jul 2008||Research In Motion Limited||Multiple-element antenna with floating antenna element|
|US7439923||6 Feb 2007||21 Oct 2008||Fractus, S.A.||Multiband antenna|
|US7505007||17 Oct 2006||17 Mar 2009||Fractus, S.A.||Multi-level antennae|
|US7511675||24 Abr 2003||31 Mar 2009||Advanced Automotive Antennas, S.L.||Antenna system for a motor vehicle|
|US7528782||20 Jul 2007||5 May 2009||Fractus, S.A.||Multilevel antennae|
|US7538641||22 Jun 2007||26 May 2009||Fractus, S.A.||Fractal and space-filling transmission lines, resonators, filters and passive network elements|
|US7541991||6 Jul 2007||2 Jun 2009||Research In Motion Limited||Antenna with near-field radiation control|
|US7541997||3 Jul 2007||2 Jun 2009||Fractus, S.A.||Loaded antenna|
|US7557768||16 May 2007||7 Jul 2009||Fractus, S.A.||Interlaced multiband antenna arrays|
|US7579976 *||10 Nov 2008||25 Ago 2009||Valentine Research, Inc.||Systems and methods for discriminating signals in a multi-band detector|
|US7920097||22 Ago 2008||5 Abr 2011||Fractus, S.A.||Multiband antenna|
|US7932870||2 Jun 2009||26 Abr 2011||Fractus, S.A.||Interlaced multiband antenna arrays|
|US7961154||28 May 2009||14 Jun 2011||Research In Motion Limited||Antenna with near-field radiation control|
|US8009111||10 Mar 2009||30 Ago 2011||Fractus, S.A.||Multilevel antennae|
|US8018386||13 Jun 2008||13 Sep 2011||Research In Motion Limited||Multiple-element antenna with floating antenna element|
|US8125397||9 Jun 2011||28 Feb 2012||Research In Motion Limited||Antenna with near-field radiation control|
|US8154462||28 Feb 2011||10 Abr 2012||Fractus, S.A.||Multilevel antennae|
|US8154463||9 Mar 2011||10 Abr 2012||Fractus, S.A.||Multilevel antennae|
|US8207893||6 Jul 2009||26 Jun 2012||Fractus, S.A.||Space-filling miniature antennas|
|US8223078||25 Ene 2012||17 Jul 2012||Research In Motion Limited||Antenna with near-field radiation control|
|US8228245||22 Oct 2010||24 Jul 2012||Fractus, S.A.||Multiband antenna|
|US8228256||10 Mar 2011||24 Jul 2012||Fractus, S.A.||Interlaced multiband antenna arrays|
|US8330659||2 Mar 2012||11 Dic 2012||Fractus, S.A.||Multilevel antennae|
|US8339323||21 Jun 2012||25 Dic 2012||Research In Motion Limited||Antenna with near-field radiation control|
|US8471772||3 Feb 2011||25 Jun 2013||Fractus, S.A.||Space-filling miniature antennas|
|US8525743||27 Nov 2012||3 Sep 2013||Blackberry Limited||Antenna with near-field radiation control|
|US8558741||9 Mar 2011||15 Oct 2013||Fractus, S.A.||Space-filling miniature antennas|
|US8610627||2 Mar 2011||17 Dic 2013||Fractus, S.A.||Space-filling miniature antennas|
|US8723742||26 Jun 2012||13 May 2014||Fractus, S.A.||Multiband antenna|
|US8738103||21 Dic 2006||27 May 2014||Fractus, S.A.||Multiple-body-configuration multimedia and smartphone multifunction wireless devices|
|US8896493||22 Jun 2012||25 Nov 2014||Fractus, S.A.||Interlaced multiband antenna arrays|
|US8941541||2 Ene 2013||27 Ene 2015||Fractus, S.A.||Multilevel antennae|
|US8976069||2 Ene 2013||10 Mar 2015||Fractus, S.A.||Multilevel antennae|
|US9000985||2 Ene 2013||7 Abr 2015||Fractus, S.A.||Multilevel antennae|
|US9054421||2 Ene 2013||9 Jun 2015||Fractus, S.A.||Multilevel antennae|
|US9099773||7 Abr 2014||4 Ago 2015||Fractus, S.A.||Multiple-body-configuration multimedia and smartphone multifunction wireless devices|
|US9240632||27 Jun 2013||19 Ene 2016||Fractus, S.A.||Multilevel antennae|
|US9331382||3 Oct 2013||3 May 2016||Fractus, S.A.||Space-filling miniature antennas|
|US9362617||13 Ago 2015||7 Jun 2016||Fractus, S.A.||Multilevel antennae|
|US20020044093 *||26 Oct 2001||18 Abr 2002||Geyi Wen||Electrically connected multi-feed antenna system|
|US20020140615 *||18 Mar 2002||3 Oct 2002||Carles Puente Baliarda||Multilevel antennae|
|US20020171601 *||23 Abr 2002||21 Nov 2002||Carles Puente Baliarda||Interlaced multiband antenna arrays|
|US20030112190 *||17 Oct 2002||19 Jun 2003||Baliarda Carles Puente||Advanced multilevel antenna for motor vehicles|
|US20040004574 *||2 Jul 2003||8 Ene 2004||Geyi Wen||Multiple-element antenna|
|US20040075613 *||16 Jun 2003||22 Abr 2004||Perry Jarmuszewski||Multiple-element antenna with parasitic coupler|
|US20040119644 *||24 Abr 2003||24 Jun 2004||Carles Puente-Baliarda||Antenna system for a motor vehicle|
|US20040145526 *||15 Oct 2003||29 Jul 2004||Carles Puente Baliarda||Dual-band dual-polarized antenna array|
|US20040210482 *||13 Abr 2004||21 Oct 2004||Tetsuhiko Keneaki||Gift certificate, gift certificate, issuing system, gift certificate using system|
|US20040227680 *||13 May 2004||18 Nov 2004||Geyi Wen||Antenna with multiple-band patch and slot structures|
|US20040257285 *||13 Abr 2004||23 Dic 2004||Quintero Lllera Ramiro||Multiband antenna|
|US20050001769 *||9 Jun 2004||6 Ene 2005||Yihong Qi||Multiple-element antenna with floating antenna element|
|US20050017906 *||24 Jul 2003||27 Ene 2005||Man Ying Tong||Floating conductor pad for antenna performance stabilization and noise reduction|
|US20050040996 *||14 Sep 2004||24 Feb 2005||Yihong Qi||Antenna with near-field radiation control|
|US20050146481 *||12 Nov 2004||7 Jul 2005||Baliarda Carles P.||Interlaced multiband antenna arrays|
|US20050190106 *||13 Abr 2004||1 Sep 2005||Jaume Anguera Pros||Multifrequency microstrip patch antenna with parasitic coupled elements|
|US20050195112 *||20 Abr 2005||8 Sep 2005||Baliarda Carles P.||Space-filling miniature antennas|
|US20050200537 *||5 May 2005||15 Sep 2005||Research In Motion Limited||Multiple-element antenna with parasitic coupler|
|US20050231427 *||16 Jun 2005||20 Oct 2005||Carles Puente Baliarda||Space-filling miniature antennas|
|US20050264453 *||12 Jul 2005||1 Dic 2005||Baliarda Carles P||Space-filling miniature antennas|
|US20060077101 *||13 Abr 2004||13 Abr 2006||Carles Puente Baliarda||Loaded antenna|
|US20070132658 *||6 Feb 2007||14 Jun 2007||Ramiro Quintero Illera||Multiband antenna|
|US20070176835 *||31 Oct 2006||2 Ago 2007||Yihong Qi||Multiple-element antenna with floating antenna element|
|US20070194992 *||17 Oct 2006||23 Ago 2007||Fractus, S.A.||Multi-level antennae|
|US20070257846 *||13 Jul 2007||8 Nov 2007||Geyi Wen||Antenna with multiple-band patch and slot structures|
|US20080011509 *||22 Jun 2007||17 Ene 2008||Baliarda Carles P||Fractal and space-filling transmission lines, resonators, filters and passive network elements|
|US20080042909 *||20 Jul 2007||21 Feb 2008||Fractus, S.A.||Multilevel antennae|
|US20080246668 *||13 Jun 2008||9 Oct 2008||Yihong Qi||Multiple-element antenna with floating antenna element|
|US20090109101 *||31 Dic 2008||30 Abr 2009||Fractus, S.A.||Space-filling miniature antennas|
|US20090267863 *||2 Jun 2009||29 Oct 2009||Carles Puente Baliarda||Interlaced multiband antenna arrays|
|US20090303134 *||6 Jul 2009||10 Dic 2009||Fractus, S.A.||Space-filling miniature antennas|
|US20110163923 *||9 Mar 2011||7 Jul 2011||Fractus, S.A.||Multilevel antennae|
|US20110175777 *||28 Feb 2011||21 Jul 2011||Fractus, S.A.||Multilevel antennae|
|US20110177839 *||9 Mar 2011||21 Jul 2011||Fractus, S.A.||Space-filling miniature antennas|
|US20110181478 *||2 Mar 2011||28 Jul 2011||Fractus, S.A.||Space-filling miniature antennas|
|US20110181481 *||3 Feb 2011||28 Jul 2011||Fractus, S.A.||Space-filling miniature antennas|
|WO2003041221A1 *||18 Jul 2002||15 May 2003||Star-H Corporation||Low profile antenna|
|Clasificación de EE.UU.||342/28, 343/747, 343/702, 343/805, 343/906|
|Clasificación internacional||G01S13/56, H03H2/00, G01S13/00|