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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: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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公开(公告)号:US20230059105A1
公开(公告)日:2023-02-23
申请号:US17890017
申请日:2022-08-17
发明人: Amjed Hallak , Matthew Gallion
摘要: A plurality of digital processors may be used to adjust phases in a plurality of phase modulators. The plurality of digital processors may receive a periodic pulse, or heartbeat signal, from a synchronization controller in order to control the digital processors. The synchronization controller may output an additional signal used to determine and to control the phase of the signals output from the plurality of phase modulators.
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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:US11004989B2
公开(公告)日:2021-05-11
申请号:US16901594
申请日:2020-06-15
发明人: Peng Yao
IPC分类号: H01L31/024 , H01L27/144 , H01L31/0304 , H01L31/105 , H01L31/18 , H01Q3/26 , H01Q21/06 , H01L31/02 , H01L23/373
摘要: A photodiode device and method of manufacturing the same are disclosed. A stack of functional layers of the photodiode device, formed of crystalline semiconductor material, may be formed on a highly thermally conductive substrate, such as diamond or SiC. The stack of functional layers may be in contact with or close proximity to the thermally conductive substrate to thereby provide an efficient thermal conductive path between the functional layers and an external source, thereby mitigating problems that may result from overheating the photodiode device.
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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:US10690850B2
公开(公告)日:2020-06-23
申请号:US16044427
申请日:2018-07-24
发明人: Janusz Murakowski , Timothy Creazzo
摘要: A method and apparatus for simultaneously modulating at least two distinct characteristics of an optical carrier propagating in an optical waveguide with at least two electrical signals includes transmitting an optical beam that includes the optical carrier into an optical waveguide defined in electro-optic material, and applying the at least two electrical signals at the same time to generate an electric field in the optical waveguide. The instantaneous predominant orientation of the electric field in the optical waveguide generated by the applied at least two electrical signals depends on the relative instantaneous values of the applied electrical signals. The at least two distinct characteristics of the optical carrier propagating in the optical waveguide are simultaneously and independently modulated depending on the predominant orientation of the electric field in the optical waveguide as a result of the application of the at least two electrical signals.
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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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公开(公告)号:US10158179B2
公开(公告)日:2018-12-18
申请号:US15481382
申请日:2017-04-06
发明人: Janusz Murakowski , Dennis Prather , Peng Yao
摘要: A phased antenna array comprises a plurality of antennas and photodiodes arranged on a substrate. Each antenna is driven by an electrical signal output by the photodiode. The photodiodes each receive an optical signal via an optical fiber. The optical fibers conform to the sheet-like shape of the antenna array (which may be planar or curved) and optically communicate with a corresponding photodiode via a corresponding reflector, such as a ninety degree reflector. The reflectors may comprise a v-groove in a silicon substrate on which the optical fiber is positioned and a reflecting surface. Each reflector may be attached to the substrate or a ground plane positioned parallel to the substrate and the optical fiber may connect to the reflector in a direction running parallel to the phased antenna array. This optical feed network may accommodate tight spacing of the antenna elements (such as spacing less than 5 mm apart) with a thin profile.
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公开(公告)号:US09614280B2
公开(公告)日:2017-04-04
申请号:US13905895
申请日:2013-05-30
发明人: Shouyuan Shi , Jian Bai , Dennis W. Prather
IPC分类号: H01Q3/26 , H01Q3/34 , H04B10/2575 , H04B10/532
CPC分类号: H01Q3/2676 , H01Q3/2682 , H01Q3/34 , H04B10/25758 , H04B10/532 , H04B2210/006
摘要: An optical feed network for a phased-array antenna may comprise a phase-based feed network that may include electro-optical phase shifting.
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