公开(公告)号：EP0691702A3

公开(公告)日：1997-03-26

申请号：EP95304781.8

申请日：1995-07-07

Applicant: COM DEV LTD.

Inventor： Tang, Wai-Cheung

IPC: H01P1/208

CPC classification number: H01P1/2082

Abstract: Multi-mode waveguide filters are temperature compensated using dielectric material (8, 10) contained within a dual mode cavity (2) of a filter. The variation in operating frequency of the filter that would otherwise result from changes in temperature is substantially balanced by a change in operating frequency with temperature caused by a change in a dielectric constant of the dielectric material (8, 10) so that the operating frequency of the filter remains substantially constant with temperature. In a method of constructing and compensating a filter, the amount of dielectric material (8, 10) is selected so that the dielectric material does not resonate at the operating frequency of the cavity (2), the amount of dielectric material in the cavity being adjustable after each cavity is constructed. The cavity is operated with a fixed amount of dielectric material contained in the cavity for each mode and the change in operating frequency of the filter with temperature is determined. If the change in operating frequency of the filter is not at an acceptable level, the amount of dielectric material contained in the cavity for each mode is varied and the filter is operated through a range of temperatures to determine whether the change in operating frequency is then at an acceptable level. These steps are repeated until the change in operating frequency of the filter is at an acceptable level. When the change in operating frequency of the filter with temperature is at an acceptable level, these filters can be used in satellites without a temperature control system.

Abstract translation: 多模波导滤波器使用包含在滤波器的双模腔（2）内的介电材料（8,10）进行温度补偿。 否则由温度变化引起的过滤器的工作频率变化基本上由介电材料（8,10）的介电常数的变化引起的工作频率随温度的变化而平衡，使得工作频率 过滤器随温度保持基本恒定。 在构造和补偿滤波器的方法中，选择介电材料（8,10）的量，使得介电材料在空腔（2）的工作频率下不谐振，空腔中的电介质材料的量为 每个腔体都可以调整。 空腔以每种模式包含在腔中的固定量的介电材料操作，并且确定具有温度的过滤器的操作频率的变化。 如果过滤器的工作频率的变化不在可接受的水平，则每个模式的腔体中所含的电介质材料的量是变化的，并且过滤器在一定温度范围内运行，以确定工作频率的变化是否为 在可接受的水平。 重复这些步骤，直到过滤器的工作频率的变化处于可接受的水平。 当温度过滤器的工作频率变化处于可接受的水平时，这些过滤器可用于没有温度控制系统的卫星。 $$

公开(公告)号：EP0720248A2

公开(公告)日：1996-07-03

申请号：EP95309491.9

申请日：1995-12-28

Applicant: COM DEV LTD.

Inventor： Mansour, Raafat R.

IPC: H01P1/203 ,  H01P3/08

CPC classification number: H01P3/081 ,  Y10S505/70 ,  Y10S505/701 ,  Y10S505/866

Abstract: The invention relates to a high power high temperature superconductive (HTS) circuit (2) for use in various microwave devices including filters, dielectric resonator filters, multiplexers, transmission lines, delay lines, hybrids and beam-forming networks. The circuit (2), for example a microstrip line, comprises an HTS film (4) on a substrate (6), beneath which is a ground plate (8). On top of each outer edge (12) of the HTS film is deposited a thin film (14) of gold or other highly conductive metal. The use of these films (14) in a part or parts of a microwave circuit reduces the current density in those parts compared to the level of current density if only HTS film (4) is used. This increases the power handling capability of the circuit (2).

Abstract translation: 本发明涉及用于包括滤波器，介质谐振滤波器，复用器，传输线，延迟线，混合和波束形成网络在内的各种微波器件的高功率高温超导（HTS）电路（2）。 电路（2），例如微带线，包括在衬底（6）上的HTS膜（4），其下面是接地板（8）。 在HTS膜的每个外边缘（12）的顶部上沉积金或其它高导​​电金属的薄膜（14）。 如果仅使用HTS膜（4），则在微波电路的一部分或部分中使用这些膜（14）可以降低这些部件中的电流密度。 这增加了电路（2）的功率处理能力。

公开(公告)号：EP0656670A3

公开(公告)日：1996-05-15

申请号：EP94308946.6

申请日：1994-12-02

Applicant: COM DEV LTD.

Inventor： Mansour, Raafat R. ,  Dokas, Van

IPC: H01P1/208

CPC classification number: H01P1/2084 ,  Y10S505/70 ,  Y10S505/866

Abstract: An improved design for microwave bandpass cavity filters wherein dielectric resonator elements are mounted in dielectric blocks (there can be more than one resonator element per dielectric block). The dielectric blocks are in turn fitted within the filter housing, and the open ends are covered by shorting plates which are maintained in contact with each resonator surface. The shorting plates may be coated with a superconductive material. The structure results in significant size reduction over prior art filters. In addition, the new design is of higher structural integrity and helps to maintain a consistent output over a wide range of temperatures. By carefully choosing the dielectric materials to insure uniform thermal expansion of the component parts, the filter output is stable over a wide range of temperatures. This allows the filters to be tuned while at cryogenic temperatures, then returned to room temperature for storage or shipping, and finally return to cryogenic temperatures for operating purposes. The filters can be constructed with various configurations and can be operated in single mode, dual-mode, triple-mode, etc.

Abstract translation: 用于微波带通腔滤波器的改进的设计，其中介质谐振器元件安装在介质块中（每个介质块可以有多于一个谐振元件）。 介质块又装配在过滤器壳体内，开口端由与每个谐振器表面保持接触的短路板覆盖。 短路板可以涂覆有超导材料。 与现有技术的过滤器相比，该结构导致显着的尺寸减小。 此外，新设计具有更高的结构完整性，有助于在宽温度范围内保持一致的输出。 通过仔细选择电介质材料以确保组件的均匀热膨胀，滤波器输出在宽的温度范围内是稳定的。 这允许过滤器在低温下进行调节，然后返回到室温进行储存或运输，最后返回到低温温度进行操作。 滤波器可以用各种配置构成，可以在单模，双模，三模等操作。

公开(公告)号：EP0276582B1

公开(公告)日：1994-03-09

申请号：EP87311547.1

申请日：1987-12-31

Applicant: COM DEV LTD.

Inventor： Au-Yeung, Henry Yuk Man

IPC: H01P1/12 ,  H01P5/02

CPC classification number: H01P1/122

公开(公告)号：EP0451974A3

公开(公告)日：1992-02-05

申请号：EP91302471.7

申请日：1991-03-21

Applicant: COM DEV LTD.

Inventor： Glenn, Thomson R. ,  Tsoi, Paul Y.

IPC: H01P1/10 ,  H01H51/22

CPC classification number: H01P1/125 ,  H01H36/0073

Abstract: C-, T- and S-switches have a connector or reed (216,220) in each conducting path. The connector or reed contains a support (230) for a permanent magnet (224, 228). All of the magnets (224, 228) of the connectors (216, 220) have the same polarity. The connectors, supports (230) and permanent reed magnets in the supports are contained within an RF cavity housing (204), which is completely sealed from an actuator (208). The actuator has a circular shape and contains permanent magnets (236, 238) that correspond in their configuration to the reed magnets of the housing. At least two magnets of the actuator have different polarities. The actuator can be rotated by a motor (210) to two or more positions. In one position, one or more of the reed magnets are attracted and one or more of the reed magnets are attracted and one or more of the reed magnets are repelled. The switch is designed so that when a reed magnet is attracted, the conducting path in which the connector is located is interrupted and when a reed magnet is repelled, the conducting path is connected. Previous switches are more expensive to manufacture and more complex, thereby increasing the likelihood of premature failure. Previous switches do not have a housing that is completely sealed from an actuator.

公开(公告)号：EP0336675A1

公开(公告)日：1989-10-11

申请号：EP89303265.6

申请日：1989-04-03

Applicant: COM DEV LTD.

Inventor： Tang, Wai-Cheung ,  Cameron, Richard John ,  Bryant, David Michael Trenchard

IPC: H01P1/208 ,  H01P1/213 ,  H01P7/10

CPC classification number: H01P1/2084 ,  H01P1/2138 ,  H01P7/10

Abstract: A multiplexer (102) can be operated in the TE 01δ or HE 11δ modes, each channel of the multiplexer has one bandpass filter, with each filter usually having a plurality of cavities (41,51). One cavity of each filter is a common cavity (51) with all of the other filters of the multiplexer. The common cavity (51) contains one independent dielectric quarter-cut or half-cut image resonator (14,15) for each filter representing a channel of the multiplexer. Each resonator (11-18) is mounted on a suitable support. The common cavity (51) provide a common junction and contains a loop coupling (61) to couple electromagnetic energy between the various channels. The multiplexer has at least one input (31) and at least one output (31).

Abstract translation: 多路复用器（102）可以以TE01 delta或HE11 delta模式操作，多路复用器的每个通道具有一个带通滤波器，每个滤波器通常具有多个空腔（41,51）。 每个滤波器的一个空腔是与多路复用器的所有其它滤波器的公共空腔（51）。 公共空腔（51）包含一个独立的介电四分之一切割或半切图像谐振器（14,15），每个滤光器表示多路复用器的通道。 每个谐振器（11-18）安装在合适的支架上。 公共空腔（51）提供公共接头并且包含用于在各个通道之间耦合电磁能的环路耦合（61）。 复用器具有至少一个输入（31）和至少一个输出（31）。

公开(公告)号：EP3993163A1

公开(公告)日：2022-05-04

申请号：EP21205273.2

申请日：2021-10-28

Applicant: COM DEV LTD.

Inventor： ARBERY, Graham Martin

IPC: H01Q5/22 ,  H01Q19/13 ,  H01Q19/17 ,  G02B17/08

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：EP3872553A1

公开(公告)日：2021-09-01

申请号：EP21156149.3

申请日：2021-02-09

Applicant: COM DEV Ltd.

Inventor： DUCELLIER, Thomas ,  BEATON, Alexander ,  ZHENG, Sheng Hai

IPC: G02B17/08 ,  G02B27/46 ,  G02B23/06 ,  H04B7/185 ,  H04B10/118 ,  G02B17/06

Abstract: An optical system includes a plurality of internal apertures, a plurality of external optical assemblies and a telescope assembly positioned between the plurality of internal apertures and the plurality of external optical assemblies. Each internal aperture is operable to receive a corresponding aperture-specific optical signal. Each external optical assembly corresponds to one of the internal apertures, and each external optical assembly is operable to direct the aperture-specific optical signal of the corresponding internal aperture in a corresponding external direction. The external direction for each external optical assembly is independently controllable and the telescope assembly defines a shared optical train arranged to direct the aperture-specific optical signals between each internal aperture and the corresponding external optical assembly.

公开(公告)号：EP3859426A1

公开(公告)日：2021-08-04

申请号：EP21154453.1

申请日：2021-01-29

Applicant: COM DEV Ltd.

Inventor： DUCELLIER, Thomas ,  ZHENG, Sheng Hai ,  MACKAY, Brian

IPC: G02B26/08 ,  G02B26/10 ,  H04B10/112 ,  H04B10/118

Abstract: An apparatus (100) for optical pointing is disclosed. The apparatus comprises a telescope (120, 122, 124, 126), a transmission prism (114) rotatably coupled to the telescope, and a rotatable mechanism (132, 136) operatively coupled to the telescope. The transmission prism is configured to rotate around a first rotation axis (116), and the rotatable mechanism is configured to rotate around a second rotation axis (144) that is different than the first rotation axis.

公开(公告)号：EP3742545A1

公开(公告)日：2020-11-25

申请号：EP20175297.9

申请日：2020-05-18

Applicant: COM DEV Ltd.

Inventor： GOULOUEV, Rousslan ,  CHANG, Jianming

IPC: H01P1/208 ,  H01P1/211

Abstract: A bandpass filter has a plurality of resonant cavities. The plurality of resonant cavities are arranged into a sequence of adjacent resonant cavities. Each resonant cavity is configured to define the same fundamental resonant frequency. The filter includes a plurality of coupling irises, with one of the coupling irises positioned between each pair of adjacent resonant cavities. Each resonant cavity includes a plurality of cavity sections. Each resonant cavity includes a capacitive iris positioned coupling the cavity sections to one another. The frequency of secondary resonance modes varies amongst the resonant cavities in the plurality of resonant cavities.