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公开(公告)号：US09148195B2
公开(公告)日：2015-09-29
申请号：US14593253
申请日：2015-01-09
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo
CPC classification number: H04L27/04 , H04B1/713 , H04B7/06 , H04L1/0612
Abstract: A method and apparatus for data modulation in an antenna array include: storing input data comprising of a plurality of data bits, in a buffer; generating a pseudo random number; computing a transmission mode from the pseudo random number; based on the computed transmission mode and the number of antenna elements in the antenna array, computing a particular phase offset for each antenna element; sequentially providing the stored input data, one bit at a time, to each antenna element; and transmitting the input data from each antenna element according to the computed particular phase offset for said each antenna element.
Abstract translation: 一种用于天线阵列中的数据调制的方法和装置包括：将包括多个数据位的输入数据存储在缓冲器中; 产生伪随机数; 从伪随机数计算传输模式; 基于所计算的传输模式和天线阵列中的天线元件的数量，计算每个天线元件的特定相位偏移; 向每个天线元件顺序地提供所存储的输入数据，一次一个位; 以及根据所计算的所述每个天线元件的特定相位偏移从每个天线元件传输输入数据。
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公开(公告)号：US20150194735A1
公开(公告)日：2015-07-09
申请号：US14590260
申请日：2015-01-06
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo
Abstract: Antennas and other transducers for use in transmitting and receiving twisted waves are disclosed. A reflector includes numerous parabolic segments having focal lengths that decrease monotonically with azimuth angle. A feed is used that is located at a focal length associated with one of the segments. Thus, each segment has a phase delay that is related to a difference between the primary focal length and the focal length of the segment. This variation of phase delay with azimuth allows twisted waves to be transmitted and received.
Abstract translation: 公开了用于发送和接收扭转波的天线和其它换能器。 反射器包括许多具有以方位角单调减小的焦距的抛物线段。 使用位于与其中一个片段相关联的焦距的馈送。 因此，每个段具有与主焦距和段的焦距之间的差有关的相位延迟。 相位延迟与方位角的这种变化允许传输和接收扭曲波。
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公开(公告)号：US20240305381A1
公开(公告)日：2024-09-12
申请号：US18424591
申请日：2024-01-26
Applicant: Raytheon Company
Inventor： Andrew M. Kowalevicz , Gary M. Graceffo , James Talamonti
IPC: H04B10/516 , G02B5/122 , G02F1/03 , G02F1/055 , H04B10/11
CPC classification number: H04B10/516 , G02F1/0311 , G02F1/055 , H04B10/11 , G02B5/122 , G02F2203/02
Abstract: A system includes a modulating retroreflector. The modulating retroreflector includes one or more reflective surfaces configured to receive an optical signal and to provide a reflected optical signal. The modulating retroreflector also includes multiple modulators configured to modulate the optical signal and encode data onto the optical signal such that the reflected optical signal represents a reflected and modulated version of the optical signal. The multiple modulators are electrically connected in series. The system also includes a control circuit configured to generate a drive signal and to provide the drive signal to the multiple modulators in order to control the encoding of the data onto the optical signal.
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44.发明公开公开(公告)号：US20230261748A1
公开(公告)日：2023-08-17
申请号：US17670119
申请日：2022-02-11
Applicant: RAYTHEON COMPANY
Inventor： James Talamonti , Andrew Kowalevicz , Gary M. Graceffo , Benjamin P. Dolgin
IPC: H04B10/2581 , H04B10/071 , H04B10/67
CPC classification number: H04B10/2581 , H04B10/67 , H04B10/071
Abstract: An optical signal receivers, systems including the optical signal receivers, and methods of operating the same include a multimode fiber circulator including a first port, a second port, and a third port, a first multimode fiber cable coupled to the first port and having an input configured to receive a complex modulated optical signal and provide the complex modulated optical signal to the first port of the multimode fiber circulator, a second multimode fiber cable including a low Q optical resonator coupled to the second port of the multimode fiber circulator that is configured to receive the complex modulated optical signal from the second port of the multimode circulator, and a third multimode fiber cable coupled to the third port of the multimode fiber circulator that is configured to receive a reflected optical signal from the third port of the multimode circulator, the reflected optical signal being reflected from the low Q optical resonator.
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公开(公告)号：US20230087573A1
公开(公告)日：2023-03-23
申请号：US17933766
申请日：2022-09-20
Applicant: Raytheon Company
Inventor： Andrew M. Kowalevicz , Benjamin P. Dolgin , Gary M. Graceffo
Abstract: A system includes an optical transceiver configured to transmit and receive optical signals. The optical transceiver includes a Faraday rotator and a waveplate. The Faraday rotator and the waveplate are collectively configured to provide a relative polarization change between (i) light propagating in a first direction through the Faraday rotator and the waveplate and (ii) light propagating in a second direction opposite the first direction through the Faraday rotator and the waveplate. The waveplate may include a quarter waveplate or a half waveplate.
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Patent Agency Ranking
公开(公告)号：US11431417B2
公开(公告)日：2022-08-30
申请号：US17035187
申请日：2020-09-28
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz , Benjamin P. Dolgin
IPC: H04B10/60 , H04B10/516 , G02B17/00 , G02F1/137
Abstract: An optical receiver includes a photonic integrator configured to accumulate optical signal energy corresponding to the input optical signal during an integration period, and to produce an output optical signal at an end of the integration period, the output optical signal having a higher intensity than the input optical signal, a shutter operable between a closed position and an open position, the shutter configured to prevent the output optical signal from exiting the photonic integrator when in the closed position and to allow the output optical signal to exit the photonic integrator when in the open position, a synchronizer coupled to the shutter and configured to control the shutter between the open position and the closed position; and a photodetector configured to receive the output optical signal when the shutter is in the open position and to produce an electrical signal corresponding to the output optical signal.
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公开(公告)号：US11303360B2
公开(公告)日：2022-04-12
申请号：US16908558
申请日：2020-06-22
Applicant: Raytheon Company
Inventor： Benjamin P. Dolgin , Andrew M. Kowalevicz , Gary M. Graceffo
IPC: H04B10/532 , G02B6/27 , H04B10/61 , H04B10/572 , H04B10/50
Abstract: An optical transmitter (and methods of transmitting and receiving) includes a delay and modulation circuit configured to receive at least one optical beam and a first data signal (persistent data) and generate at least two or more modulated optical beams having the first data encoded therein. One of the modulated optical beams is a time-delayed or time-shifted version of another one of the modulated optical beams, and both beams are directed toward a target. The amount or time delay between the first and second optical beams can be modulated according to a second data signal (non-persistent data) to encode the second data therein. An optical receiver is configured to detect the two modulated optical beams and recover the first data. Because changes in the amount or time delays between the first and second optical beams results in a positional change in the location of the combined centroid of the received beams at a detector of the receiver, the second data can be recovered by detecting the positional changes.
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公开(公告)号：US11258516B2
公开(公告)日：2022-02-22
申请号：US17035170
申请日：2020-09-28
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz , Benjamin P. Dolgin
IPC: H04B10/60 , H04B10/516 , G02B17/00 , G02F1/137
Abstract: An optical transmitter and a method of producing a low-photon-density modulated optical signal are disclosed. The optical transmitter and method include an optical source configured to emit a continuous optical carrier waveform, a dilation module configured to apply a spreading code to a data payload to spread each of the plurality of symbols in time to expand the symbol duration by a dilation factor and produce a corresponding plurality of time-dilated symbols, the plurality of time-dilated symbols having a lower photon density than the plurality of symbols; a mapping module configured to map the plurality of time-dilated symbols to a modulation scheme; and a modulator configured to modulate the optical carrier waveform with the plurality of time-dilated symbols according to the modulation scheme to produce the low-photon-density modulated optical signal encoded with the plurality of time-dilated symbols corresponding to the data payload.
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公开(公告)号：US20210314071A1
公开(公告)日：2021-10-07
申请号：US17082548
申请日：2020-10-28
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz , Benjamin P. Dolgin
Abstract: Methods and apparatus for air to underwater communications. In one example, an optical transceiver configurable between two operational modes includes a laser assembly configured to transmit a modulated laser beam when in a first mode of the two operational modes and to transmit an unmodulated beam when in a second mode of the two operational modes, an optical receiver configured to receiver reflections of the unmodulated laser beam from a surface of a body of water and to output measurement data based on the reflections of the unmodulated laser beam, and a controller configured to determine surface conditions of the surface of the body of water based on the measurement data, to adjust at least one property of the modulated laser beam based on the surface conditions, and to operably switch the laser assembly between the first and second modes.
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公开(公告)号：US11057020B1
公开(公告)日：2021-07-06
申请号：US16792800
申请日：2020-02-17
Applicant: Raytheon Company
Inventor： Gary M. Graceffo , Andrew M. Kowalevicz , Benjamin P. Dolgin
Abstract: An apparatus includes a tunable non-Foster matching network having (i) an amplification stage with an amplifier and (ii) a reference reactance coupled in parallel with the amplifier. The non-Foster matching network is configured to provide a negative reactance based on the reference reactance. The amplification stage also includes at least one adjustable circuit element configured to adjust a gain of the amplification stage and thereby adjust the negative reactance. In some cases, the amplification stage may include a common emitter amplification stage having a transistor, and the at least one adjustable circuit element may include an adjustable capacitor and/or multiple adjustable resistors in an emitter circuit of the transistor. In other cases, the amplification stage may include an operational amplifier and multiple resistors configured to set a gain of the operational amplifier, and the at least one adjustable circuit element may include at least one of the resistors.
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