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1.发明公开公开(公告)号：US20240348343A1
公开(公告)日：2024-10-17
申请号：US18633351
申请日：2024-04-11
IPC分类号： H04B10/61 , H04B7/10 , H04B10/112
CPC分类号： H04B10/615 , H04B7/10 , H04B10/112
摘要： An apparatus and methods for receiving polarization diverse radio signals. The apparatus includes a coherent light source configured to output an optical carrier signal, a dual polarization antenna, and a nested Mach-Zehnder Modulator. The nested Mach-Zehnder Modulator is configured to receive the optical carrier signal, a first RF electrical signal from a first output of a dual polarization antenna corresponding to a first linear polarization mode and a second RF electrical signal from a second output of the dual polarization antenna corresponding to a second linear polarization mode, modulate the optical carrier signal based on the first RF electrical signal and the second RF electrical signal to generate an upper optical sideband signal, a lower optical sideband signal, and output the upper and lower optical sideband signal separately.
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公开(公告)号：US12021565B2
公开(公告)日：2024-06-25
申请号：US18070802
申请日：2022-11-29
IPC分类号： H04B10/516 , H01Q3/26 , H04B1/16 , H04B10/11 , H04B10/2575 , H04B10/64
CPC分类号： H04B10/5165 , H01Q3/2676 , H04B1/16 , H04B10/11 , H04B10/25759 , H04B10/64 , H04B2210/006
摘要： A method of RF signal processing comprises receiving an incoming RF signal at each of a plurality of antenna elements that are arranged in a first pattern. The received RF signals from each of the plurality of antenna elements are modulated onto an optical carrier to generate a plurality of modulated signals that each have at least one sideband. The modulated signals are directed along a corresponding plurality of optical channels with outputs arranged in a second pattern corresponding to the first pattern. A composite optical signal is formed using light emanating from the outputs of the plurality of optical channels. Non-spatial information contained in at least one of the received RF signals is extracted from the composite signal.
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公开(公告)号：US20240056186A1
公开(公告)日：2024-02-15
申请号：US18383365
申请日：2023-10-24
IPC分类号： H04B10/2575 , H04B10/00 , H04B10/69
CPC分类号： H04B10/2575 , H04B10/00 , H04B10/69 , H04B2210/006
摘要： An optical imaging system and method that reconstructs RF sources in k-space by utilizing interference amongst modulated optical beams. The system and method involves recording with photodetectors the interference pattern produced by RF-modulated optical beams conveyed by optical fibers having unequal lengths. The photodetectors record the interference, and computational analysis using known tomography reconstruction methods is performed to reconstruct the RF sources in k-space.
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公开(公告)号：US10313012B2
公开(公告)日：2019-06-04
申请号：US15956545
申请日：2018-04-18
IPC分类号： H04B10/2575 , H04B10/69 , H04B10/00
摘要： A system and method reconstructs RF sources in k-space by utilizing interference between RF signals detected by an array of antennas. The system and method may include detecting an RF interference pattern resulting from interference between RF signals in an RF coupler, where the RF signals are detected by the antennas and provided to the RF coupler by RF waveguides. The RF waveguides may have unequal RF path lengths. K-space information of the RF sources may be reconstructed from the detected RF interference pattern using known tomography reconstruction methods.
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公开(公告)号：US20190020410A1
公开(公告)日：2019-01-17
申请号：US16010090
申请日：2018-06-15
摘要： An optical imaging system and method that reconstructs RF sources in k-space by utilizing interference amongst modulated optical beams. The system and method involves recording with photodetectors the interference pattern produced by RF-modulated optical beams conveyed by optical fibers having unequal lengths. The photodetectors record the interference, and computational analysis using known tomography reconstruction methods is performed to reconstruct the RF sources in k-space.
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公开(公告)号：US20160006516A1
公开(公告)日：2016-01-07
申请号：US14791351
申请日：2015-07-03
IPC分类号： H04B10/516 , H04B10/64 , H04B1/16 , H04B10/11
CPC分类号： H04B10/5165 , H01Q3/2676 , H04B1/16 , H04B10/11 , H04B10/25759 , H04B10/64 , H04B2210/006
摘要： A method of RF signal processing comprises receiving an incoming RF signal at each of a plurality of antenna elements that are arranged in a first pattern. The received RF signals from each of the plurality of antenna elements are modulated onto an optical carrier to generate a plurality of modulated signals that each have at least one sideband. The modulated signals are directed along a corresponding plurality of optical channels with outputs arranged in a second pattern corresponding to the first pattern. A composite optical signal is formed using light emanating from the outputs of the plurality of optical channels. Non-spatial information contained in at least one of the received RF signals is extracted from the composite signal.
摘要翻译： RF信号处理的方法包括在以第一模式布置的多个天线元件中的每一个处接收输入RF信号。 将从多个天线元件中的每一个接收的RF信号调制到光学载体上以产生多个调制信号，每个调制信号具有至少一个边带。 调制信号沿对应的多个光通道引导，输出以对应于第一图案的第二图案排列。 使用从多个光通道的输出发出的光形成复合光信号。 从复合信号中提取包含在所接收的RF信号中的至少一个中的非空间信息。
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公开(公告)号：US20150139253A1
公开(公告)日：2015-05-21
申请号：US14083671
申请日：2013-11-19
IPC分类号： H04B10/516
CPC分类号： H04B10/5165 , H04B10/5057 , H04B10/50577
摘要： An optical modulation apparatus for modulating an electromagnetic (e.g., radio frequency (RF)) signal onto an optical carrier signal may use carrier recycling to increase modulation efficiency. Such an arrangement may be implemented, e.g., using a Fabry-Perot topology and/or using a travelling-wave modulator.
摘要翻译： 用于将电磁（例如射频（RF））信号调制到光载波信号上的光调制装置可以使用载波回收来提高调制效率。 这种布置可以例如使用法布里 - 珀罗拓扑结构和/或使用行波调制器来实现。
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公开(公告)号：US11909424B2
公开(公告)日：2024-02-20
申请号：US17457519
申请日：2021-12-03
发明人： Stefano Galli , Munawar Kermalli , Xiao-Feng Qi , Shouyuan Shi , Dennis Prather , Janusz Murakowski , Garrett Schneider
CPC分类号： H04B1/0064 , H04B10/40 , H04J14/0205 , H04Q11/0071 , H04B2210/006 , H04Q2011/0088
摘要： In certain embodiments, an apparatus includes a switch matrix and frequency band isolation circuitry. The switch matrix is configured to receive, at an input port, an electrical signal, which corresponds to a transmission signal received at antennas of an antenna array. The transmission signal corresponds to a transmission spatial sector of the array. The electrical signal includes first and second signal portions in first and second frequency bands, respectively, the electrical signal having been generated from an optical signal that corresponds to the transmission signal. The switch matrix is configured to direct, via an output port and in accordance with a control signal, the electrical signal to a first of multiple signal conversion paths.
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公开(公告)号：US10911142B2
公开(公告)日：2021-02-02
申请号：US16284984
申请日：2019-02-25
摘要： An optical imaging system and method that reconstructs RF sources in k-space by utilizing interference amongst modulated optical beams. The system and method involves recording with photodetectors the interference pattern produced by RF-modulated optical beams conveyed by optical fibers having unequal lengths. The photodetectors record the interference, and computational analysis using known tomography reconstruction methods is performed to reconstruct the RF sources in k-space.
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公开(公告)号：US20200091603A1
公开(公告)日：2020-03-19
申请号：US16687119
申请日：2019-11-18
发明人： Shouyuan Shi , Jian Bai , Chris Schuetz , Garrett Schneider , Dennis Prather
摘要： An optically-fed tightly-coupled array (TCA) antenna comprises a plurality of photodiodes and antennas. Each photodiode may receive an optical signal from an optical fiber and convert the optical signal into an RF driving signal to drive a corresponding antenna to which it is connected. Each photodiode may be connected to the antenna. In some examples, the TCA is capable of ultra-wideband operation ranging from 2-12 GHz and wide beam-steering capability up to 40° from the broadside. Inductance peaking and resistance matching may be employed.
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