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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：US12051859B2
公开(公告)日：2024-07-30
申请号：US17457528
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： H01Q3/2676 , H04Q11/0005 , H04W16/28 , H04Q2011/0024 , H04Q2011/0026 , H04Q2011/0058
摘要： In certain embodiments, a system includes an optical switch matrix, an optical lens coupled to the switch matrix, and a wireless transmitter coupled to the lens. The switch matrix is configured to switch first optical signals from input ports to output ports of the switch matrix, and output second optical signals that are based at least partially on the first optical signals. The lens is configured to transform wave formats of the second optical signals based on the output ports over which the second optical signals are received. The transmitter includes an antenna array and circuitry coupled to the array. The circuitry is configured to receive the second optical signals from the lens, convert the second optical signals into beamformed wireless signals in accordance with the transformed formats, and transmit the beamformed wireless signals, which signals have spatial characteristics in accordance with the transformed formats, over the array.
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公开(公告)号：US20220094374A1
公开(公告)日：2022-03-24
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
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：US20220166137A1
公开(公告)日：2022-05-26
申请号：US17457528
申请日：2021-12-03
发明人： Stefano Galli , Munawar Kermalli , Xiao-Feng Qi , Shouyuan Shi , Dennis Prather , Janusz Murakowski , Garrett Schneider
摘要： In certain embodiments, a system includes an optical switch matrix, an optical lens coupled to the switch matrix, and a wireless transmitter coupled to the lens. The switch matrix is configured to switch first optical signals from input ports to output ports of the switch matrix, and output second optical signals that are based at least partially on the first optical signals. The lens is configured to transform wave formats of the second optical signals based on the output ports over which the second optical signals are received. The transmitter includes an antenna array and circuitry coupled to the array. The circuitry is configured to receive the second optical signals from the lens, convert the second optical signals into beamformed wireless signals in accordance with the transformed formats, and transmit the beamformed wireless signals, which signals have spatial characteristics in accordance with the transformed formats, over the array.
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公开(公告)号：US11749887B2
公开(公告)日：2023-09-05
申请号：US17324582
申请日：2021-05-19
发明人： Shouyuan Shi , Dennis Prather
IPC分类号： H01Q3/26 , H04B10/2575 , H04B10/40 , H01Q21/00 , H04B10/00
CPC分类号： H01Q3/2676 , H01Q21/0025 , H04B10/00 , H04B10/2575 , H04B10/40 , H04B2210/006
摘要： Disclosed herein is a swappable modular-based radiofrequency (RF) frontend that is reconfigurable to form transmitting (TX) and receiving (RX) phased array systems for diverse applications. Such swappable RF frontend may be used with unique spatial and spectral optical processing of complex RF signals over an ultra-wide frequency band. The swappable RF front end may be used in conjunction with an optically upconverted imaging receiver and/or in conjunction with optically addressed phased array technologies transmitters.
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6.发明申请公开(公告)号：US20210232045A1
公开(公告)日：2021-07-29
申请号：US17159628
申请日：2021-01-27
发明人： Shouyuan Shi , Dennis Prather , Peng Yao , Janusz MURAKOWSKI
摘要： This disclosure is directed to two-dimensional conformal optically-fed phased arrays and methods for manufacturing the same. The method includes providing a wafer substrate, depositing a first cladding layer on the wafer substrate, and depositing a core layer on the first cladding layer. The method further includes photolithographically patterning the core layer to provide a plurality of optical waveguide cores, and depositing a second cladding layer on the core layer to cover the plurality of optical waveguide cores to provide a plurality of optical waveguides. In addition, the method includes forming a plurality of antennas on the second cladding layer, each antenna of the plurality of antennas located near a termination of a corresponding optical waveguide of the plurality of optical waveguides, and providing a plurality of photodiodes on the second cladding layer, each photodiode of the plurality of photodiodes connected to a corresponding antenna.
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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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9.发明申请公开(公告)号：US20190319356A1
公开(公告)日：2019-10-17
申请号：US16386196
申请日：2019-04-16
摘要： In the disclosed optically-fed transmitting phased-array architecture, transmitting signals are converted between the electrical domain and the optical domain by using electro-optic (EO) modulators and photodiodes. RF signal(s) generated from a relatively low frequency source modulate an optical carrier signal. This modulated optical signal can be remotely imparted to photodiodes via optical fibers. Desired RF signals may be recovered by photo-mixing at the photodiodes whose wired RF outputs are then transmitted to radiating elements of the antennas. The antenna array may generate a physical RF beam that transmits an RF signal that is focused on one or more selectable locations. Multiple RF beams may be simultaneously generated, each RF beam being capable of being directed to focus on a unique location or set of locations.
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公开(公告)号：US10164712B2
公开(公告)日：2018-12-25
申请号：US15790281
申请日：2017-10-23
IPC分类号： H04B10/00 , H04B10/516 , H04B10/2575 , H04B1/16 , H04B10/11 , H04B10/64 , H01Q3/26
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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