公开(公告)号：US20030234707A1

公开(公告)日：2003-12-25

申请号：US10465226

申请日：2003-06-20

Applicant: COM DEV Ltd.

Inventor： R. Glenn Thomson ,  Ming Yu

IPC: H01P007/06

CPC classification number: H01P3/12 ,  H01P1/2138

Abstract: A waveguide assembly for operation over a range of temperatures includes a waveguide body and a plurality of restraining strips coupled to the waveguide body. The waveguide body includes a pre-curved narrow sidewall of material having a first coefficient of thermal expansion (CTE). The restraining strips are coupled to the waveguide body at first and second lateral points on either side of the pre-curved narrow sidewall laterally and are spaced apart along the length of the waveguide body, and are made from a material having a second CTE much less than the first CTE. Thus, when the temperature of the waveguide assembly changes, the restraining strips maintain a substantially constant lateral distance between said first and second lateral points over the range of temperatures such that as the length of the waveguide varies with temperature, the curvature of the pre-curved narrow sidewall also changes, causing the effective large dimension of the waveguide assembly to vary such that the combination of said changes results in a constant phase length for said waveguide body.

Abstract translation: 用于在一定温度范围内操作的波导组件包括波导体和耦合到波导体的多个限制条。 波导体包括具有第一热膨胀系数（CTE）的材料的预弯曲窄侧壁。 限制条在预弯曲的窄侧壁的任一侧上的第一和第二横向点在波导体上被耦合到波导体，并且沿着波导体的长度间隔开，并且由具有第二CTE的材料制成 比第一个CTE。 因此，当波导组件的温度改变时，限制条在温度范围内在所述第一和第二横向点之间保持基本上恒定的横向距离，使得随着波导的长度随着温度而变化， 弯曲的窄侧壁也改变，导致波导组件的有效大尺寸变化，使得所述变化的组合导致所述波导体的恒定相位长度。

公开(公告)号：US11770189B2

公开(公告)日：2023-09-26

申请号：US17478627

申请日：2021-09-17

Applicant: COM DEV Ltd.

Inventor： Alan Scott ,  Hugh Podmore

IPC: H04J14/02 ,  H04B10/25 ,  H04B10/294 ,  H04B10/50

CPC classification number: H04B10/25 ,  H04B10/294 ,  H04B10/506 ,  H04J14/02

Abstract: Various embodiments are disclosed herein with generally relate to an optical communication system using a photonic lantern. In at least one embodiment, the optical system comprises: an optical transmitter coupled to a signal transmitting path; an optical receiver coupled to a signal receiving path; a photonic lantern, the photonic lantern extending between a first open end and a second open end, the first end comprising an opening to a single multi-mode fiber, and the second end comprising a plurality of single mode fibers that are adiabatically coupled to the multi-mode fiber, the plurality of single-mode fibers includes a single-mode fiber adapted to carry a fundamental optical mode and the remaining single-mode fibers adapted to carry higher-order optical modes, wherein, the single-mode fiber is coupled to the optical transmitting path, the remaining single-mode fibers are coupled to the optical receiving path.

公开(公告)号：US20220350083A1

公开(公告)日：2022-11-03

申请号：US17243359

申请日：2021-04-28

Applicant: COM DEV LTD.

Inventor： Thomas Ducellier

IPC: G02B6/293 ,  H04B10/40 ,  H04B10/112 ,  H04B10/118

Abstract: An optical communication system that includes terminals that operate with different, widely separated wavelengths in which a terminal in the system may be configured to function in both a first operational mode and in a second operational mode. For example, a terminal according to the techniques of this disclosure may communicate with full duplex communication by transmitting a first optical wavelength and receiving a second optical wavelength while in the first operational mode. The same terminal may be reconfigured to transmit the second optical wavelength and receive the first optical wavelength while in the second operational mode. In some examples, the terminal may be located in a spacecraft, such as an orbiting satellite or other vehicle, and may communicate with other terminals such as airborne terminals, terminals located at ground station on the Earth's surface, or with terminals located in other spacecraft.

公开(公告)号：US20220140902A1

公开(公告)日：2022-05-05

申请号：US17085107

申请日：2020-10-30

Applicant: COM DEV LTD.

Inventor： Graham Martin ARBERY

IPC: H04B10/112 ,  H04B1/38 ,  H01Q15/14 ,  H04B10/118

Abstract: Disclosed are systems for transmitting and receiving a radio frequency (RF) signal and an optical signal. One system may include a communication terminal comprising a primary concave reflector providing a first focal length to a focal point, and a secondary concave reflector providing a second focal length to the focal point. The communication terminal may further comprise an optical transceiver facing the secondary concave reflector, and one or more RF transceivers facing the primary concave reflector. The optical transceiver may be configured to transmit and receive the optical signal via the primary and secondary concave reflectors through the focal point, and the one or more RF transceivers may be configured to transmit and receive the RF signal via the primary concave reflector. The one or more RF transceivers may be positioned adjacent to the focal point and offset from a path of the optical signal.

公开(公告)号：US10323923B2

公开(公告)日：2019-06-18

申请号：US15384832

申请日：2016-12-20

Applicant: COM DEV Ltd.

Inventor： Antonio Romano

IPC: G01B7/00 ,  H04Q9/00 ,  H04Q1/24 ,  G01R27/02

Abstract: A telemetry system with a matrixed telemetry switch unit array and a method for determining the switch position of a telemetry switch unit. The switch units include steering diodes and parallel signal paths each with unique resistance values. The signal paths correspond to switch positions and are closed when the switch unit is in the corresponding switch position. A signal source is electrically connected to an input current path and output current path of the array with a corresponding telemetry switch unit coupled into the signal path. A plurality of sensing signals are applied through the array and the resultant signals are measured. The switch position is determined from the resultant signals indicating the resistance value of the switch signal path currently coupled into the array signal path while accounting for the voltage drop of the steering diodes.

公开(公告)号：US10122251B2

公开(公告)日：2018-11-06

申请号：US14725686

申请日：2015-05-29

Applicant: COM DEV Ltd.

Inventor： Brian Keats ,  Klaus Engel

IPC: H02K37/10 ,  H01P1/12 ,  H02K37/02 ,  H02K1/14 ,  H02K19/06

Abstract: A sequential actuator for a radio frequency switch includes a rotor designed to be rotated in a designated rotational direction of the actuator and a stator defining with the rotor when the stator is energized an active torque curve of the rotor having asymmetric positive and negative torque curve portions. Magnetic elements are distributed between the rotor and the stator and define a detent torque curve of the rotor. In some examples, when the stator is energized, the rotor undergoes a first rotation from a position of partial angular overlap of a first rotor magnetic element with a first stator electromagnet to a position of angular alignment of the first rotor magnetic element with the first stator electromagnet. Upon reaching this angular position, a second rotor magnetic element has a partial angular overlap with a second stator electromagnet and the rotor further undergoes a second rotation to another position of angular alignment of the second rotor magnetic element with the second stator electromagnet.

公开(公告)号：US20040119552A1

公开(公告)日：2004-06-24

申请号：US10323895

申请日：2002-12-20

Applicant: Com Dev Ltd.

Inventor： Gordon Thomas Wray

IPC: H01P001/26 ,  H01P001/23

CPC classification number: H01P1/26 ,  H01P1/22

Abstract: A device for absorbing at least a portion electromagnetic energy that is provided by a transmission line and transferring the resulting heat generated by absorption to a heat sink. The device has a housing in communication with the transmission line for receiving the electromagnetic energy. The housing also provides at least a portion of an internal transmission line for confining and guiding the electromagnetic energy within the device. The housing is also in communication with the heat sink for transferring the resulting heat thereto. The device also has an absorber that is in communication with the housing for receiving the electromagnetic energy, absorbing at least a portion of the electromagnetic energy and providing resulting heat to the housing. The absorber comprises ferrite.

Abstract translation: 用于吸收由传输线提供的至少一部分电磁能量并将由吸收产生的所产生的热量传递到散热器的装置。 该装置具有与用于接收电磁能的传输线连通的壳体。 壳体还提供用于限制和引导装置内的电磁能量的内部传输线的至少一部分。 壳体还与散热器连通，用于将所产生的热量传递给散热器。 该装置还具有与壳体连通的吸收器，用于接收电磁能量，吸收至少一部分电磁能并向壳体提供所产生的热量。 吸收体包含铁素体。

公开(公告)号：US20040108920A1

公开(公告)日：2004-06-10

申请号：US10314352

申请日：2002-12-09

Applicant: Com Dev Ltd.

Inventor： Ming Yu ,  Van Dokas ,  Wai-Cheung Tang

IPC: H01P001/205

CPC classification number: H01P1/2053 ,  H01P1/20

Abstract: The invention provides a method and apparatus for an adaptively predistortion filter which has a transfer function that satisfies performance criteria specified for at least one property of the filter. The transfer function is obtained by adaptively predistorting the transfer function poles to meet the performance criteria such that at least one of the poles is shifted by a unique amount.

Abstract translation: 本发明提供了一种用于自适应预失真滤波器的方法和装置，其具有满足为滤波器的至少一个特性规定的性能标准的传递函数。 通过自适应地预失真传递函数极以满足性能标准获得传递函数，使得至少一个极被偏移独特的量。

公开(公告)号：US20040108215A1

公开(公告)日：2004-06-10

申请号：US10407455

申请日：2003-04-07

Applicant: Com Dev Ltd.

Inventor： James Jacob Donaldson ,  Bruce William Clark

IPC: C25D005/02 ,  C25D017/00

CPC classification number: C25D5/02 ,  C25D7/04 ,  C25D17/10

Abstract: An electroplating anode assembly and method for electroplating the plating area of a work-piece. The assembly includes a conductive element and a helical insulating coil. The conductive element can either be a straight conductive wire or a helically coiled conductive wire. The insulating coil is substantially equal in length to the conductive element and positioned around the conductive element for preventing the conductive element from contacting the plating area of the work-piece. The insulating coil extends continuously along the length of the entire electroplating portion of the conductive element. The anode assembly can be used to achieve uniform and adequate electroplating surfaces within recessed and enclosed plating areas of work-pieces that are conventionally difficult to electroplate due to its ability to be readily manipulated into various shapes. Further, anode assembly can be readily repositioned during the course of electroplating to further reduce the instance of localized areas of thick/thin deposition.

Abstract translation: 一种用于电镀工件电镀区域的电镀阳极组件和方法。 组件包括导电元件和螺旋绝缘线圈。 导电元件可以是直线导线或螺旋线圈导电线。 绝缘线圈的长度与导电元件基本相同，并且位于导电元件周围，以防止导电元件接触工件的电镀区域。 绝缘线圈沿着导电元件的整个电镀部分的长度连续延伸。 阳极组件可用于在通常难以电镀的工件的凹陷和封闭的电镀区域内实现均匀且充分的电镀表面，因为其能够容易地操纵成各种形状。 此外，阳极组件可以在电镀过程中容易地重新定位，以进一步减少厚/薄沉积的局部区域的实例。

公开(公告)号：US11128373B1

公开(公告)日：2021-09-21

申请号：US16945112

申请日：2020-07-31

Applicant: COM DEV LTD.

Inventor： Hugh Podmore ,  Alan Scott ,  Thomas Ducellier

IPC: H04B10/00 ,  H04B10/112 ,  H04B10/516 ,  H04B10/564 ,  H04J14/00

Abstract: Various embodiments for a system and method for a range-enhanced high-speed free-space optical communication are described herein. Generally, the optical communication system may include a first modulator, a second modulator and an average-power limited optical amplifier. The first modulator may receive an input optical signal and generate a modulated optical signal. The second modulator may receive the modulated signal and may be operable to turn-off a select number of pulses in each modulated pulse frame of the modulated signal to generate a low-duty cycle modulated signal. The average-power limited optical amplifier may then generate an amplified modulated signal from the low-duty cycle signal, wherein the amplified modulated signal comprises a plurality of amplified pulse frames with each amplified pulse frame defining an amplified version of a corresponding each low-duty cycle pulse frame.