US20060164299A1 - Wireless local area network antenna system and method of use therefore - Google Patents
Wireless local area network antenna system and method of use therefore Download PDFInfo
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- US20060164299A1 US20060164299A1 US11/389,920 US38992006A US2006164299A1 US 20060164299 A1 US20060164299 A1 US 20060164299A1 US 38992006 A US38992006 A US 38992006A US 2006164299 A1 US2006164299 A1 US 2006164299A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
- H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/40—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with phasing matrix
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Definitions
- the present invention generally relates to electronically beam steering phased array antennas, tunable phase shifter, and tunable dielectric capacitors.
- Multipath delay causes the information symbols represented in an 802.11 signal to overlap, which confuses the receiver. This is often referred to as intersymbol Interference (ISI). Because the shape of the signal conveys the information being transmitted, the receiver will make mistakes when demodulating the signal's information. If the delays are great enough, bit errors in the packet will occur. The receiver won't be able to distinguish the symbols and interpret the corresponding bits correctly.
- ISI intersymbol Interference
- the receiving station When multipath strikes in this way, the receiving station will detect the errors through 802.11's error checking process. The CRC (cyclic redundancy check) checksum will not compute correctly, indicating that there are errors in the packet. In response to bit errors, the receiving station will not send an ACK to the source. The source will then eventually retransmit the signal after regaining access to the medium.
- CRC cyclic redundancy check
- 802.11 signals in homes and offices may encounter 50 nanoseconds multipath delay while a manufacturing plant could be as high as 300 nanoseconds.
- the present invention provides an apparatus, comprising an active receive aperture and a multiple scanning beamformer receiving signals from said active receive aperture via at least one low noise amplifier (LNA) stage and at least one beamformer, the at least one beamformer may employ at least one phase shifter.
- the phase shifters may comprise a voltage tunable dielectric material and the voltage tunable dielectric material may be Parascan® dielectric material.
- FIG. 1 is an illustration of one embodiment of the antenna system of the present invention
- FIG. 2 is an illustration of another embodiment of the antenna system of the present invention.
- FIG. 3 is an illustration of yet another embodiment of the antenna system of the present invention.
- Tunable dielectric materials are the materials whose permittivity (more commonly called dielectric constant) can be varied by varying the strength of an electric field to which the materials are subjected or immersed. Examples of such materials can be found in U.S. Pat. Nos. 5,312,790, 5,427,988, 5,486,491, 5,693,429 and 6,514,895. These materials show low dielectric loss and high tunability.
- Parascan® voltage tunable dielectric materials are embodied within software controlled tunable filters, diplexers, matching networks and phased-array antennas, tunable notch filters, null-steer antennas, smart antennas, tunable phase shifters, voltage controlled oscillators (VCO's) and voltage tunable dielectric capacitors.
- the terms Parascan® voltage tunable capacitors, Parascan® variable capacitors, Parascan® tunable dielectric capacitors and Parascan® varactors have the same meaning and are interchangeable herein.
- Existing antenna configurations for wireless networks may utilize an antenna configuration that is based on multiple fixed beams. For example, there may be 13 independent beams that support three simultaneous packets on three different channels. The 10 other unused beams when not in “listening” or “scanning” mode may be used solely to detect new user access requests. Since the beams are narrow, multipath problems may be reduced to some extent, but since the sidelobes or the slope of the main beam can still detect multipath signals, it is not eliminated completely. If the number of beams is reduced, for example, and not by way of limitation, from 13 to 4, the multipath negative effects may be reduced. However, with a reduced number of beams, the number of users that can be covered efficiently may also be reduced.
- Another concern for the existing system is that the 3.8 dB crossover or scalloping loss typical in multiple adjacent fixed beams may cause capacity and throughput reduction. Yet another concern for the existing systems is that if the users decide to move around inside the coverage range, they will face even more degraded quality of service.
- the present invention provides an improved wireless local area network by improving antenna system throughput. This may be accomplished by mitigating multipath; improving signal to interference ratio; and reducing the system hardware cost by eliminating unused beams. Furthermore, by using scanning beams, the present invention may provide mobility and may track mobile users and may even provide location-based services.
- This improved wireless local area network antenna system may use electronically scanning wireless local area network (WLAN) phased array antennas that may use tunable phase shifters which may incorporate a tunable material. Further, this tunable material in an embodiment of the present invention may use Parascan® tunable material. Although the present invention is not limited in this respect.
- FIG. 1 illustrates an antenna system, shown generally as 100 , with a passive aperture 120 driven by a Butler Matrix beamformer 110 which may be used for transmit only.
- a transmit switch matrix 105 with transmit ports 115 may provide the input to Butler matrix 110 .
- An active receive aperture 175 may be used in the present invention and in one embodiment may be capable of handling 4 or more independently steerable beams.
- the receive aperture may have 16 columns of elements to provide this functionality.
- the present invention is not limited to any particular number of rows or columns. Also, it is understood that the number of steerable beams and whether or not they are independently steerable or not is merely illustrative of one embodiment and it is understood that a large number of steerable beams are within the scope of the present invention.
- the active beamformer 130 for receiving may include low noise amplifiers (LNA) stages 135 , 140 , 145 and 150 , and beamformers 155 , 160 , 165 and 170 which in one embodiment of the present invention may employ phase shifters.
- LNA low noise amplifier
- Receiving output from the LNAs is a multiple scanning beam former 130 with receive ports 125 .
- one beam may be dedicated to finding new users and user requests, and to monitor interference. Although it is understood that one beam or more than one beam can accomplish this in alternate embodiments of the present invention.
- the scanning beam Once the scanning beam has identified the users (in one embodiment as described herein, the users may be up to three simultaneous packets on three difference channels), the other 3 or more beams may be directed to point to each of the users at the maximum gain.
- the system of the present invention covers essentially the same number of users with fewer independent beams than the current state of the art systems. In this embodiment, 4 scanning beams may replace 13 fixed beams. This may reduce the size and complexity of the antenna hardware and produce better performance by reducing multipath effects.
- the present invention allows for a methodology to profile the interference environment.
- the methodology could also be self-learning and adaptive by adding a feedback loop, thereby improving the interference reduction over time and adapting to changes in the interference profile.
- the use of continuously steerable beams also enables the tracking of mobile users.
- phase shifters can also be added in the transmit path which could provide additional system improvement.
- the present invention overcomes this shortcoming by adding phase shifters 235 between the Butler matrix 230 and the radiating columns 240 .
- the present invention provides for the potential to control the phase shifters and thereby enable the ability change the directions of the beams pointed to the users by up to half the beam spacing and to reduce the crossover loss down to 0.5 dB from 3.8 dB.
- the phase shifters may have an additional loss of about 0.5 dB, the benefit may be up to 2.8 dB.
- the present invention also advances the state of the art by improving the signal to interference ratio as well. This may be achieved by null the steering capability of the multi beam steerable antenna of the present invention. Since all of the beams may be steered simultaneously, the signal to interference ratio and the cross-over loss may be improved by optimizing the beamsteering such that the interferers will be as close as possible to pattern nulls, and the users as close as possible to pattern maxima.
- FIG. 3 another embodiment of the present invention is shown generally at 300 .
- This embodiment may be particularly useful, although not limited in this respect, to situations where only moderate antenna gain is needed; and thus enables an eloquent system capable of handling up to 3 simultaneous beams.
- Three cylindrical sub-arrays 334 , 336 and 338 each producing a 22.5 deg beamwidth in elevation and 45 deg in azimuth can be stacked up to create a single cylindrical form factor of not more than about 18 inches high and 2.8 inches in diameter.
- Each sub-array 334 , 336 and 338 in one embodiment is capable of scanning a 45 deg wide beam in azimuth through 360 degrees. Although the present invention is not limited in this respect. In one embodiment of the present invention, a 12 dBi gain antenna system may be provided. Beamformers (3 in one preferred embodiment of the present invention) 330 with RF I/O ports (3 in one preferred embodiment of the present invention) drive sub-array 334 , 336 and 338 .
Abstract
Description
- This application is a divisional of U.S. patent application Ser. No. 10/850,991, entitled, WIRELESS LOCAL AREA NETWORK ANTENNA SYSTEM AND METHOD OF USE THEREFORE”, to Shamsaifar et al. which claimed the benefit of priority under 35 U.S.C Section 119 from U.S. Provisional Application Ser. No. 60/472,599, filed May 22, 2003, entitled, “Wireless Local Area Network Antenna System”, by Shamsaifar et al., assigned to Paratek Microwave, Inc.
- The present invention generally relates to electronically beam steering phased array antennas, tunable phase shifter, and tunable dielectric capacitors.
- Multipath delay causes the information symbols represented in an 802.11 signal to overlap, which confuses the receiver. This is often referred to as intersymbol Interference (ISI). Because the shape of the signal conveys the information being transmitted, the receiver will make mistakes when demodulating the signal's information. If the delays are great enough, bit errors in the packet will occur. The receiver won't be able to distinguish the symbols and interpret the corresponding bits correctly.
- When multipath strikes in this way, the receiving station will detect the errors through 802.11's error checking process. The CRC (cyclic redundancy check) checksum will not compute correctly, indicating that there are errors in the packet. In response to bit errors, the receiving station will not send an ACK to the source. The source will then eventually retransmit the signal after regaining access to the medium.
- Because of retransmissions, users will encounter lower throughput when multipath is significant. The reduction in throughput depends on the environment. As examples, 802.11 signals in homes and offices may encounter 50 nanoseconds multipath delay while a manufacturing plant could be as high as 300 nanoseconds.
- Thus, there is a strong need in the RF industry and more particularly in the wireless local area network industry for wireless devices, networks, methods and systems which may overcome multipath and other RF transmission shortcomings to improve performance in a wireless local area network.
- The present invention provides an apparatus, comprising an active receive aperture and a multiple scanning beamformer receiving signals from said active receive aperture via at least one low noise amplifier (LNA) stage and at least one beamformer, the at least one beamformer may employ at least one phase shifter. The phase shifters may comprise a voltage tunable dielectric material and the voltage tunable dielectric material may be Parascan® dielectric material.
- The subject matter regarded as the invention is particularly pointed out and distinctly claimed in the concluding portion of the specification. The invention, however, both as to organization and method of operation, together with objects, features, and advantages thereof, may best be understood by reference to the following detailed description when read with the accompanying drawings in which:
-
FIG. 1 is an illustration of one embodiment of the antenna system of the present invention; -
FIG. 2 is an illustration of another embodiment of the antenna system of the present invention; -
FIG. 3 is an illustration of yet another embodiment of the antenna system of the present invention. - It will be appreciated that for simplicity and clarity of illustration, elements illustrated in the figures have not necessarily been drawn to scale. For example, the dimensions of some of the elements are exaggerated relative to other elements for clarity. Further, where considered appropriate, reference numerals have been repeated among the figures to indicate corresponding or analogous elements.
- Although tunable materials in general can be utilized and are anticipated by the present invention, one tunable material that is described in an embodiment of the present invention is Parascan®. Parascan® is a trademarked tunable dielectric material developed by Paratek Microwave, Inc., the assignee of the present invention. Tunable dielectric materials are the materials whose permittivity (more commonly called dielectric constant) can be varied by varying the strength of an electric field to which the materials are subjected or immersed. Examples of such materials can be found in U.S. Pat. Nos. 5,312,790, 5,427,988, 5,486,491, 5,693,429 and 6,514,895. These materials show low dielectric loss and high tunability. Tunability is defined as the fractional change in the dielectric constant with applied voltage. The patents above are incorporated into the present application by reference in their entirety. Parascan® voltage tunable dielectric materials are embodied within software controlled tunable filters, diplexers, matching networks and phased-array antennas, tunable notch filters, null-steer antennas, smart antennas, tunable phase shifters, voltage controlled oscillators (VCO's) and voltage tunable dielectric capacitors. The terms Parascan® voltage tunable capacitors, Parascan® variable capacitors, Parascan® tunable dielectric capacitors and Parascan® varactors have the same meaning and are interchangeable herein.
- Existing antenna configurations for wireless networks may utilize an antenna configuration that is based on multiple fixed beams. For example, there may be 13 independent beams that support three simultaneous packets on three different channels. The 10 other unused beams when not in “listening” or “scanning” mode may be used solely to detect new user access requests. Since the beams are narrow, multipath problems may be reduced to some extent, but since the sidelobes or the slope of the main beam can still detect multipath signals, it is not eliminated completely. If the number of beams is reduced, for example, and not by way of limitation, from 13 to 4, the multipath negative effects may be reduced. However, with a reduced number of beams, the number of users that can be covered efficiently may also be reduced. Another concern for the existing system is that the 3.8 dB crossover or scalloping loss typical in multiple adjacent fixed beams may cause capacity and throughput reduction. Yet another concern for the existing systems is that if the users decide to move around inside the coverage range, they will face even more degraded quality of service.
- The present invention provides an improved wireless local area network by improving antenna system throughput. This may be accomplished by mitigating multipath; improving signal to interference ratio; and reducing the system hardware cost by eliminating unused beams. Furthermore, by using scanning beams, the present invention may provide mobility and may track mobile users and may even provide location-based services. This improved wireless local area network antenna system may use electronically scanning wireless local area network (WLAN) phased array antennas that may use tunable phase shifters which may incorporate a tunable material. Further, this tunable material in an embodiment of the present invention may use Parascan® tunable material. Although the present invention is not limited in this respect.
- Turning now to the figures,
FIG. 1 illustrates an antenna system, shown generally as 100, with apassive aperture 120 driven by a Butler Matrixbeamformer 110 which may be used for transmit only. Atransmit switch matrix 105 withtransmit ports 115 may provide the input to Butlermatrix 110. - An
active receive aperture 175 may be used in the present invention and in one embodiment may be capable of handling 4 or more independently steerable beams. In one embodiment, the receive aperture may have 16 columns of elements to provide this functionality. Although, the present invention is not limited to any particular number of rows or columns. Also, it is understood that the number of steerable beams and whether or not they are independently steerable or not is merely illustrative of one embodiment and it is understood that a large number of steerable beams are within the scope of the present invention. - The
active beamformer 130 for receiving may include low noise amplifiers (LNA)stages beamformers ports 125. - In one embodiment of the present invention, one beam may be dedicated to finding new users and user requests, and to monitor interference. Although it is understood that one beam or more than one beam can accomplish this in alternate embodiments of the present invention. Once the scanning beam has identified the users (in one embodiment as described herein, the users may be up to three simultaneous packets on three difference channels), the other 3 or more beams may be directed to point to each of the users at the maximum gain. Thus, the system of the present invention covers essentially the same number of users with fewer independent beams than the current state of the art systems. In this embodiment, 4 scanning beams may replace 13 fixed beams. This may reduce the size and complexity of the antenna hardware and produce better performance by reducing multipath effects. Since most of the WLAN users are fixed users, the present invention allows for a methodology to profile the interference environment. The methodology could also be self-learning and adaptive by adding a feedback loop, thereby improving the interference reduction over time and adapting to changes in the interference profile. The use of continuously steerable beams also enables the tracking of mobile users. Further, phase shifters can also be added in the transmit path which could provide additional system improvement.
- Another problem with the current state of the art approaches, which may consist of several adjacent fixed beams, is the existence of crossover or scalloping loss of typically 3.8 dB. As depicted in
FIG. 2 , shown generally as 200, the present invention overcomes this shortcoming by addingphase shifters 235 between theButler matrix 230 and the radiatingcolumns 240. In this way, the present invention provides for the potential to control the phase shifters and thereby enable the ability change the directions of the beams pointed to the users by up to half the beam spacing and to reduce the crossover loss down to 0.5 dB from 3.8 dB. As the phase shifters may have an additional loss of about 0.5 dB, the benefit may be up to 2.8 dB. Since more phase shift may be needed at the edges of the array, the associated more loss towards the edges of the array may also improve the sidelobe levels to some extent, which will further improve the multipath problem. Transmitswitch matrix 205 with transmitports 215 as well as receiveswitch 210 with receiveports 220 feed into diplexers 225 (in oneembodiment 13 diplexers are used).Diplexers 225 provide input to and receive output frombutler matrix 230. - The present invention also advances the state of the art by improving the signal to interference ratio as well. This may be achieved by null the steering capability of the multi beam steerable antenna of the present invention. Since all of the beams may be steered simultaneously, the signal to interference ratio and the cross-over loss may be improved by optimizing the beamsteering such that the interferers will be as close as possible to pattern nulls, and the users as close as possible to pattern maxima.
- Turning now to
FIG. 3 , another embodiment of the present invention is shown generally at 300. This embodiment may be particularly useful, although not limited in this respect, to situations where only moderate antenna gain is needed; and thus enables an eloquent system capable of handling up to 3 simultaneous beams. Threecylindrical sub-arrays - Each sub-array 334, 336 and 338 in one embodiment is capable of scanning a 45 deg wide beam in azimuth through 360 degrees. Although the present invention is not limited in this respect. In one embodiment of the present invention, a 12 dBi gain antenna system may be provided. Beamformers (3 in one preferred embodiment of the present invention) 330 with RF I/O ports (3 in one preferred embodiment of the present invention)
drive sub-array - While the present invention has been described in terms of what are at present believed to be its preferred embodiments, those skilled in the art will recognize that various modifications to the disclose embodiments can be made without departing from the scope of the invention as defined by the following claims.
Claims (9)
Priority Applications (1)
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US11/389,920 US20060164299A1 (en) | 2003-05-22 | 2006-03-27 | Wireless local area network antenna system and method of use therefore |
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US47259903P | 2003-05-22 | 2003-05-22 | |
US10/850,991 US20050030227A1 (en) | 2003-05-22 | 2004-05-22 | Wireless local area network antenna system and method of use therefore |
US11/389,920 US20060164299A1 (en) | 2003-05-22 | 2006-03-27 | Wireless local area network antenna system and method of use therefore |
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US10/850,991 Division US20050030227A1 (en) | 2003-05-22 | 2004-05-22 | Wireless local area network antenna system and method of use therefore |
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US20060164299A1 true US20060164299A1 (en) | 2006-07-27 |
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US10/850,991 Abandoned US20050030227A1 (en) | 2003-05-22 | 2004-05-22 | Wireless local area network antenna system and method of use therefore |
US11/389,920 Abandoned US20060164299A1 (en) | 2003-05-22 | 2006-03-27 | Wireless local area network antenna system and method of use therefore |
US12/284,516 Active US7843387B2 (en) | 2003-05-22 | 2008-09-23 | Wireless local area network antenna system and method of use therefore |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11469497B2 (en) | 2008-11-20 | 2022-10-11 | Commscope Technologies Llc | Dual-beam sector antenna and array |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005072469A2 (en) * | 2004-01-28 | 2005-08-11 | Paratek Microwave Inc. | Apparatus and method operable in a wireless local area network incorporating tunable dielectric capacitors embodied within an intelligent adaptive antenna |
US8085199B2 (en) * | 2008-12-13 | 2011-12-27 | Broadcom Corporation | Receiver including a matrix module to determine angular position |
US8988274B2 (en) * | 2009-11-16 | 2015-03-24 | The Board Of Regents Of The University Of Oklahoma | Cylindrical polarimetric phased array radar |
EP2891210A1 (en) * | 2012-08-29 | 2015-07-08 | Telefonaktiebolaget LM Ericsson (PUBL) | A wireless communication node with antenna arrangement for dual band reception and transmission |
WO2014086386A1 (en) * | 2012-12-03 | 2014-06-12 | Telefonaktiebolaget L M Ericsson (Publ) | A wireless communication node with 4tx/4rx triple band antenna arrangement |
US9848370B1 (en) * | 2015-03-16 | 2017-12-19 | Rkf Engineering Solutions Llc | Satellite beamforming |
US10530448B1 (en) | 2018-12-28 | 2020-01-07 | Nokia Technologies Oy | Switched-beam communication node |
FR3098024B1 (en) * | 2019-06-27 | 2022-06-03 | Thales Sa | Reduced complexity two-dimensional multibeam analog trainer for reconfigurable active array antennas |
US11469874B2 (en) * | 2019-10-01 | 2022-10-11 | Qualcomm Incorporated | Full-duplex wireless communication using beamforming |
Citations (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4882588A (en) * | 1986-12-22 | 1989-11-21 | Hughes Aircraft Company | Steerable beam antenna system using butler matrix |
US5312790A (en) * | 1993-06-09 | 1994-05-17 | The United States Of America As Represented By The Secretary Of The Army | Ceramic ferroelectric material |
US5593495A (en) * | 1994-06-16 | 1997-01-14 | Sharp Kabushiki Kaisha | Method for manufacturing thin film of composite metal-oxide dielectric |
US5635434A (en) * | 1995-09-11 | 1997-06-03 | The United States Of America As Represented By The Secretary Of The Army | Ceramic ferroelectric composite material-BSTO-magnesium based compound |
US5635433A (en) * | 1995-09-11 | 1997-06-03 | The United States Of America As Represented By The Secretary Of The Army | Ceramic ferroelectric composite material-BSTO-ZnO |
US5640042A (en) * | 1995-12-14 | 1997-06-17 | The United States Of America As Represented By The Secretary Of The Army | Thin film ferroelectric varactor |
US5693429A (en) * | 1995-01-20 | 1997-12-02 | The United States Of America As Represented By The Secretary Of The Army | Electronically graded multilayer ferroelectric composites |
US5694134A (en) * | 1992-12-01 | 1997-12-02 | Superconducting Core Technologies, Inc. | Phased array antenna system including a coplanar waveguide feed arrangement |
US5766697A (en) * | 1995-12-08 | 1998-06-16 | The United States Of America As Represented By The Secretary Of The Army | Method of making ferrolectric thin film composites |
US5771017A (en) * | 1993-08-12 | 1998-06-23 | Northern Telecom Limited | Base station antenna arrangement |
US5830591A (en) * | 1996-04-29 | 1998-11-03 | Sengupta; Louise | Multilayered ferroelectric composite waveguides |
US5846893A (en) * | 1995-12-08 | 1998-12-08 | Sengupta; Somnath | Thin film ferroelectric composites and method of making |
US5886867A (en) * | 1995-03-21 | 1999-03-23 | Northern Telecom Limited | Ferroelectric dielectric for integrated circuit applications at microwave frequencies |
US5990766A (en) * | 1996-06-28 | 1999-11-23 | Superconducting Core Technologies, Inc. | Electrically tunable microwave filters |
US6074971A (en) * | 1998-11-13 | 2000-06-13 | The United States Of America As Represented By The Secretary Of The Army | Ceramic ferroelectric composite materials with enhanced electronic properties BSTO-Mg based compound-rare earth oxide |
US6377142B1 (en) * | 1998-10-16 | 2002-04-23 | Paratek Microwave, Inc. | Voltage tunable laminated dielectric materials for microwave applications |
US6377217B1 (en) * | 1999-09-14 | 2002-04-23 | Paratek Microwave, Inc. | Serially-fed phased array antennas with dielectric phase shifters |
US6377440B1 (en) * | 2000-09-12 | 2002-04-23 | Paratek Microwave, Inc. | Dielectric varactors with offset two-layer electrodes |
US6404614B1 (en) * | 2000-05-02 | 2002-06-11 | Paratek Microwave, Inc. | Voltage tuned dielectric varactors with bottom electrodes |
US6463301B1 (en) * | 1997-11-17 | 2002-10-08 | Nortel Networks Limited | Base stations for use in cellular communications systems |
US6492883B2 (en) * | 2000-11-03 | 2002-12-10 | Paratek Microwave, Inc. | Method of channel frequency allocation for RF and microwave duplexers |
US6514895B1 (en) * | 2000-06-15 | 2003-02-04 | Paratek Microwave, Inc. | Electronically tunable ceramic materials including tunable dielectric and metal silicate phases |
US6525630B1 (en) * | 1999-11-04 | 2003-02-25 | Paratek Microwave, Inc. | Microstrip tunable filters tuned by dielectric varactors |
US20030038748A1 (en) * | 2001-08-27 | 2003-02-27 | Henderson Herbert Jefferson | Dynamic multi-beam antenna using dielectrically tunable phase shifters |
US20030038747A1 (en) * | 2001-08-23 | 2003-02-27 | Jaynesh Patel | Nearfield calibration method used for phased array antennas containing tunable phase shifters |
US6531936B1 (en) * | 1998-10-16 | 2003-03-11 | Paratek Microwave, Inc. | Voltage tunable varactors and tunable devices including such varactors |
US6535076B2 (en) * | 2001-05-15 | 2003-03-18 | Silicon Valley Bank | Switched charge voltage driver and method for applying voltage to tunable dielectric devices |
US6538603B1 (en) * | 2000-07-21 | 2003-03-25 | Paratek Microwave, Inc. | Phased array antennas incorporating voltage-tunable phase shifters |
US20030062541A1 (en) * | 2001-08-28 | 2003-04-03 | Michael Warner | High-frequency chip packages |
US6556102B1 (en) * | 1999-11-18 | 2003-04-29 | Paratek Microwave, Inc. | RF/microwave tunable delay line |
US6590468B2 (en) * | 2000-07-20 | 2003-07-08 | Paratek Microwave, Inc. | Tunable microwave devices with auto-adjusting matching circuit |
US6597265B2 (en) * | 2000-11-14 | 2003-07-22 | Paratek Microwave, Inc. | Hybrid resonator microstrip line filters |
US20050110674A1 (en) * | 2002-03-18 | 2005-05-26 | Greg Mendolia | Tracking apparatus, system and method |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4453164A (en) * | 1982-07-26 | 1984-06-05 | Rca Corporation | Method of determining excitation of individual elements of a phase array antenna from near-field data |
US5414433A (en) * | 1994-02-16 | 1995-05-09 | Raytheon Company | Phased array radar antenna with two-stage time delay units |
US5870063A (en) * | 1996-03-26 | 1999-02-09 | Lockheed Martin Corp. | Spacecraft with modular communication payload |
US6584144B2 (en) * | 1997-02-24 | 2003-06-24 | At&T Wireless Services, Inc. | Vertical adaptive antenna array for a discrete multitone spread spectrum communications system |
US6016124A (en) * | 1997-04-07 | 2000-01-18 | Nortel Networks Corporation | Digital beamforming in a satellite communication system |
US6013032A (en) * | 1998-03-13 | 2000-01-11 | Hewlett-Packard Company | Beamforming methods and apparatus for three-dimensional ultrasound imaging using two-dimensional transducer array |
JP2002032990A (en) * | 2000-07-17 | 2002-01-31 | Mitsubishi Electric Corp | Semiconductor memory |
WO2002023672A2 (en) * | 2000-09-15 | 2002-03-21 | Raytheon Company | Microelectromechanical phased array antenna |
FR2816102B1 (en) * | 2000-10-27 | 2003-06-06 | Schneider Electric Ind Sa | BALL ACTUATOR |
US6703976B2 (en) * | 2001-11-21 | 2004-03-09 | Lockheed Martin Corporation | Scaleable antenna array architecture using standard radiating subarrays and amplifying/beamforming assemblies |
US6597312B1 (en) * | 2002-01-30 | 2003-07-22 | Northrop Grumman Corporation | Phased array antenna system generating multiple beams having a common phase center |
US6654985B1 (en) * | 2002-06-03 | 2003-12-02 | Lu Sheng-Nan | Pivot hinge |
-
2004
- 2004-05-22 US US10/850,991 patent/US20050030227A1/en not_active Abandoned
- 2004-05-22 WO PCT/US2004/016205 patent/WO2004107499A2/en active Application Filing
-
2006
- 2006-03-27 US US11/389,920 patent/US20060164299A1/en not_active Abandoned
-
2008
- 2008-09-23 US US12/284,516 patent/US7843387B2/en active Active
Patent Citations (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4882588A (en) * | 1986-12-22 | 1989-11-21 | Hughes Aircraft Company | Steerable beam antenna system using butler matrix |
US5694134A (en) * | 1992-12-01 | 1997-12-02 | Superconducting Core Technologies, Inc. | Phased array antenna system including a coplanar waveguide feed arrangement |
US5312790A (en) * | 1993-06-09 | 1994-05-17 | The United States Of America As Represented By The Secretary Of The Army | Ceramic ferroelectric material |
US5427988A (en) * | 1993-06-09 | 1995-06-27 | The United States Of America As Represented By The Secretary Of The Army | Ceramic ferroelectric composite material - BSTO-MgO |
US5486491A (en) * | 1993-06-09 | 1996-01-23 | The United States Of America As Represented By The Secretary Of The Army | Ceramic ferroelectric composite material - BSTO-ZrO2 |
US5771017A (en) * | 1993-08-12 | 1998-06-23 | Northern Telecom Limited | Base station antenna arrangement |
US5593495A (en) * | 1994-06-16 | 1997-01-14 | Sharp Kabushiki Kaisha | Method for manufacturing thin film of composite metal-oxide dielectric |
US5693429A (en) * | 1995-01-20 | 1997-12-02 | The United States Of America As Represented By The Secretary Of The Army | Electronically graded multilayer ferroelectric composites |
US5886867A (en) * | 1995-03-21 | 1999-03-23 | Northern Telecom Limited | Ferroelectric dielectric for integrated circuit applications at microwave frequencies |
US5635433A (en) * | 1995-09-11 | 1997-06-03 | The United States Of America As Represented By The Secretary Of The Army | Ceramic ferroelectric composite material-BSTO-ZnO |
US5635434A (en) * | 1995-09-11 | 1997-06-03 | The United States Of America As Represented By The Secretary Of The Army | Ceramic ferroelectric composite material-BSTO-magnesium based compound |
US5766697A (en) * | 1995-12-08 | 1998-06-16 | The United States Of America As Represented By The Secretary Of The Army | Method of making ferrolectric thin film composites |
US5846893A (en) * | 1995-12-08 | 1998-12-08 | Sengupta; Somnath | Thin film ferroelectric composites and method of making |
US5640042A (en) * | 1995-12-14 | 1997-06-17 | The United States Of America As Represented By The Secretary Of The Army | Thin film ferroelectric varactor |
US5830591A (en) * | 1996-04-29 | 1998-11-03 | Sengupta; Louise | Multilayered ferroelectric composite waveguides |
US5990766A (en) * | 1996-06-28 | 1999-11-23 | Superconducting Core Technologies, Inc. | Electrically tunable microwave filters |
US6463301B1 (en) * | 1997-11-17 | 2002-10-08 | Nortel Networks Limited | Base stations for use in cellular communications systems |
US6377142B1 (en) * | 1998-10-16 | 2002-04-23 | Paratek Microwave, Inc. | Voltage tunable laminated dielectric materials for microwave applications |
US6531936B1 (en) * | 1998-10-16 | 2003-03-11 | Paratek Microwave, Inc. | Voltage tunable varactors and tunable devices including such varactors |
US6074971A (en) * | 1998-11-13 | 2000-06-13 | The United States Of America As Represented By The Secretary Of The Army | Ceramic ferroelectric composite materials with enhanced electronic properties BSTO-Mg based compound-rare earth oxide |
US6377217B1 (en) * | 1999-09-14 | 2002-04-23 | Paratek Microwave, Inc. | Serially-fed phased array antennas with dielectric phase shifters |
US6525630B1 (en) * | 1999-11-04 | 2003-02-25 | Paratek Microwave, Inc. | Microstrip tunable filters tuned by dielectric varactors |
US6556102B1 (en) * | 1999-11-18 | 2003-04-29 | Paratek Microwave, Inc. | RF/microwave tunable delay line |
US6404614B1 (en) * | 2000-05-02 | 2002-06-11 | Paratek Microwave, Inc. | Voltage tuned dielectric varactors with bottom electrodes |
US6514895B1 (en) * | 2000-06-15 | 2003-02-04 | Paratek Microwave, Inc. | Electronically tunable ceramic materials including tunable dielectric and metal silicate phases |
US6590468B2 (en) * | 2000-07-20 | 2003-07-08 | Paratek Microwave, Inc. | Tunable microwave devices with auto-adjusting matching circuit |
US6538603B1 (en) * | 2000-07-21 | 2003-03-25 | Paratek Microwave, Inc. | Phased array antennas incorporating voltage-tunable phase shifters |
US6377440B1 (en) * | 2000-09-12 | 2002-04-23 | Paratek Microwave, Inc. | Dielectric varactors with offset two-layer electrodes |
US6492883B2 (en) * | 2000-11-03 | 2002-12-10 | Paratek Microwave, Inc. | Method of channel frequency allocation for RF and microwave duplexers |
US6597265B2 (en) * | 2000-11-14 | 2003-07-22 | Paratek Microwave, Inc. | Hybrid resonator microstrip line filters |
US6535076B2 (en) * | 2001-05-15 | 2003-03-18 | Silicon Valley Bank | Switched charge voltage driver and method for applying voltage to tunable dielectric devices |
US20030038747A1 (en) * | 2001-08-23 | 2003-02-27 | Jaynesh Patel | Nearfield calibration method used for phased array antennas containing tunable phase shifters |
US20030038748A1 (en) * | 2001-08-27 | 2003-02-27 | Henderson Herbert Jefferson | Dynamic multi-beam antenna using dielectrically tunable phase shifters |
US20030062541A1 (en) * | 2001-08-28 | 2003-04-03 | Michael Warner | High-frequency chip packages |
US20050110674A1 (en) * | 2002-03-18 | 2005-05-26 | Greg Mendolia | Tracking apparatus, system and method |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11469497B2 (en) | 2008-11-20 | 2022-10-11 | Commscope Technologies Llc | Dual-beam sector antenna and array |
Also Published As
Publication number | Publication date |
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US7843387B2 (en) | 2010-11-30 |
US20050030227A1 (en) | 2005-02-10 |
WO2004107499A2 (en) | 2004-12-09 |
WO2004107499A3 (en) | 2006-11-02 |
US20090046007A1 (en) | 2009-02-19 |
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