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公开(公告)号：US10135423B1
公开(公告)日：2018-11-20
申请号：US15801051
申请日：2017-11-01
发明人： Bingqian Lu , Hamad Alsawaha , Peter Hou , Thomas Jackson , Yilin Mao
摘要： An apparatus and method for continuously shifting the phase of an input signal includes a quadrature hybrid having an input/output port for receiving an input radio frequency (RF) signal and outputting a phase shifted RF signal. An analog shifting unit is connected to the quadrature hybrid for performing an intermediate phase shift on the input RF signal. An additional analog shifting unit is connected to an isolation port of the quadrature hybrid to receive an intermediate output signal based on the intermediate phase shift, and shifting a phase of the intermediate output signal to produce an intermediate input signal. The analog shifting unit performs a final phase shift of the intermediate input signal and the final phase shifted intermediate input signal is output, at the input/output port, as the phase shifted RF signal.
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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：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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5.发明授权公开(公告)号：US11804658B2
公开(公告)日：2023-10-31
申请号：US16186088
申请日：2018-11-09
发明人： Bingqian Lu , Hamad Alsawaha , Peter Hou , Thomas Jackson
IPC分类号： H01Q15/24 , H01Q19/02 , H01Q13/02 , H01Q19/195 , H01Q25/00
CPC分类号： H01Q15/24 , H01Q13/025 , H01Q13/0208 , H01Q19/021 , H01Q19/195 , H01Q25/001
摘要： An apparatus and method for mitigating polarization mismatch in reflector antenna systems. A feed unit is configured to determine a polarization mismatch between a first polarization associated with a first wave and a second polarization associated with a reflector unit. The feed unit pre-distorts the first wave to achieve a compensated polarization for reducing and/or eliminating a polarization mismatch. The pre-distorted first wave having the compensated polarization is used to illuminate the reflector unit. A re-radiated wave is reflected by the reflector unit. Furthermore, the level of the re-radiated wave is increased as a result of the pre-distortion.
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6.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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7.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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