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11.发明授权公开(公告)号：US10374663B2
公开(公告)日：2019-08-06
申请号：US15396070
申请日：2016-12-30
发明人： Thomas Jackson , Hamad Alsawaha , Bingqian Lu , Peter Hou , Yilin Mao
摘要： Systems and methods disclosed herein provide techniques for reducing quantization errors and side lobe levels in phased array antennas. The states of a quantized phase shifter of a phased array antenna may be dithered to achieve a time-averaged value that reduces quantization errors. By rapidly switching between the different states of the quantized phase shifter, a time-average value close to a desired phase state may be achieved with a low resolution phase shifter.
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12.发明申请公开(公告)号：US20180191406A1
公开(公告)日：2018-07-05
申请号：US15396070
申请日：2016-12-30
发明人： Thomas Jackson , Hamad Alsawaha , Bingqian Lu , Peter Hou , Yilin Mao
CPC分类号： H04B7/01 , H01Q3/26 , H01Q3/38 , H01Q21/22 , H04B7/18528
摘要： Systems and methods disclosed herein provide techniques for reducing quantization errors and side lobe levels in phased array antennas. The states of a quantized phase shifter of a phased array antenna may be dithered to achieve a time-averaged value that reduces quantization errors. By rapidly switching between the different states of the quantized phase shifter, a time-average value close to a desired phase state may be achieved with a low resolution phase shifter.
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13.发明申请公开(公告)号：US20160372838A1
公开(公告)日：2016-12-22
申请号：US15185515
申请日：2016-06-17
发明人： Thomas Jackson , Peter Hou
CPC分类号： H01Q19/13 , H01Q1/48 , H01Q5/55 , H01Q15/0013 , H01Q15/148 , H01Q19/12 , H01Q19/17 , H01Q19/19 , H04B7/18513 , H04W72/0413 , H04W72/042
摘要： Systems and methods are provided for separating the uplink signal from the downlink signal in a satellite communication system. A communication terminal for satellite communications is provided, comprising a reflector having a prime focus; a first feed located at the prime focus of the reflector and in optical communication with the reflector; a frequency-selective surface module having a reflected focus and located at a point along a communication path between the main reflector and the first feed; and a second feed located at the reflected focus of the frequency-selective surface module and in optical communication with the frequency-selective surface module.
摘要翻译： 提供了用于在卫星通信系统中将上行链路信号与下行链路信号分离的系统和方法。 提供了一种用于卫星通信的通信终端，包括具有主要焦点的反射器; 位于反射器的主要焦点并与反射器光学连通的第一进给; 频率选择性表面模块，其具有反射焦点并且位于沿着主反射器和第一馈送之间的连通路径的点; 以及位于频率选择性表面模块的反射焦点处并与频率选择性表面模块光学通信的第二馈电。
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公开(公告)号：US11532890B2
公开(公告)日：2022-12-20
申请号：US16237656
申请日：2018-12-31
发明人： Bingqian Lu , Peter Hou , Kunj Desai , Taiwei Yue , Anthony Fanelli
摘要： A method for providing frequency selective surface zoning includes selecting a location for positioning a frequency selective surface (FSS) panel along a support arm of a reflector antenna system, and positioning a second feed horn on the support arm on an opposite side of the FSS panel. A number of unit cells are used to populate the FSS panel, and metallic patterns are formed on each unit cell. Multiple zones are subsequently defined on the surface of the FSS panel. Each zone is optimized for a predetermined range of incident angles.
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公开(公告)号：US10784550B2
公开(公告)日：2020-09-22
申请号：US16416659
申请日：2019-05-20
发明人： Bingqian Lu , Hamad Alsawaha , Peter Hou , Thomas Jackson , Yilin Mao
摘要： A phase shifter having both digital and analog shifting components is disclosed. The digital-analog phase shifter includes an input/output port configured, in part, for receiving an input radio frequency (RF) signal from an external source and outputting a phase shifted RF signal. A digital shifter performs coarse phase shifts of the input RF signal, while an analog shifter variably shift the phase of the input RF signal relative to the coarse phase shift. This produces a phase shifted RF signal having a total phase range that is output is continuously variable from 0° to 360°.
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公开(公告)号：US10714830B2
公开(公告)日：2020-07-14
申请号：US15723692
申请日：2017-10-03
发明人： Thomas Jackson , Bingqian Lu , Hamad Alsawaha , Peter Hou , Yilin Mao
摘要： A digital phase shifter is described where each bit of the phase shifter has a circuit block including one PIN diode in parallel with one transmission line. The phase shifter requires only one PIN diode and one transmission line per bit circuit block. Each PIN diode behaves like a simple switch for phase shifting. When the PIN diode is forward biased (“on” state), current flows through the PIN diode and the RF signal is not phase shifted. When the pin diode is not forward biased (“off” state), current flows through the transmission line parallel to the PIN diode and the RF signal is phase shifted by the transmission line. The digital phase shifter may have n circuit blocks in series, and adjacent PIN diodes may share a current when both are on. The phase shifter may be implemented in a phased array or reflect array antenna including multiple phase shifters.
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公开(公告)号：US10658757B2
公开(公告)日：2020-05-19
申请号：US15610447
申请日：2017-05-31
发明人： Thomas Jackson , Peter Hou
摘要： A device and method are described for duplex satellite communication over a single satellite antenna. A satellite ground terminal may utilize a frequency-selective surface module including a frequency-selective surface as a subreflector acting as a frequency diplexer to separate signals received and/or transmitted by a first feed and a second feed of a satellite ground terminal, where each feed has a separate antenna horn. The frequency-selective surface module may be used in combination with a second subreflector such that a first feed and a second feed of the satellite ground terminal are implemented on the same side of the frequency-selective surface module.
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公开(公告)号：US10511071B2
公开(公告)日：2019-12-17
申请号：US15800731
申请日：2017-11-01
发明人： Bingqian Lu , Hamad Alsawaha , Peter Hou , Thomas Jackson , Yilin Mao
摘要： A phase shifter having both digital and analog shifting components is disclosed. The digital-analog phase shifter includes an input/output port configured, in part, for receiving an input radio frequency (RF) signal from an external source and outputting a phase shifted RF signal. A digital shifter performs coarse phase shifts of the input RF signal, while an analog shifter variably shift the phase of the input RF signal relative to the coarse phase shift. This produces a phase shifted RF signal having a total phase range that is output is continuously variable from 0° to 360°.
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公开(公告)号：US20170264020A1
公开(公告)日：2017-09-14
申请号：US15610447
申请日：2017-05-31
发明人： Thomas Jackson , Peter Hou
CPC分类号： H01Q19/13 , H01Q15/0013 , H01Q19/17 , H01Q19/19 , H01Q19/191 , H04B1/0057 , H04B7/18513 , H04B7/18517 , H04B7/18528
摘要： A device and method are described for duplex satellite communication over a single satellite antenna. A satellite ground terminal may utilize a frequency-selective surface module including a frequency-selective surface as a subreflector acting as a frequency diplexer to separate signals received and/or transmitted by a first feed and a second feed of a satellite ground terminal, where each feed has a separate antenna horn. The frequency-selective surface module may be used in combination with a second subreflector such that a first feed and a second feed of the satellite ground terminal are implemented on the same side of the frequency-selective surface module.
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