公开(公告)号：EP1569295A1

公开(公告)日：2005-08-31

申请号：EP05250946.0

申请日：2005-02-18

Applicant: COM DEV LTD.

Inventor： Gorovoy, Evgeni ,  Wiesel, Jeffrey M.

IPC: H01P1/12

CPC classification number: H01P1/122

Abstract: A microwave switch housing assembly for operation in a selected frequency range. The housing assembly includes a housing having ports, a rotor containing at least one waveguide passage, and power absorbing material positioned either in the housing or in the rotor. Ports are positioned within the housing it so that in a first position of the rotor, the waveguide passage connects the ports and in a second position of the rotor, the waveguide passage is unconnected to the ports. The power absorbing material is positioned adjacent to one end of said waveguide passage when said rotor is in said second position it absorbs electromagnetic energy in the frequency range and reduces the tendency of the isolation passage to act as a volume resonator when the rotor is in the second position.

Abstract translation: 一种用于在选定频率范围内操作的微波开关壳体组件。 壳体组件包括具有端口的壳体，包含至少一个波导通道的转子和定位在壳体中或转子中的功率吸收材料。 端口定位在壳体内，使得在转子的第一位置中，波导通道连接端口，并且在转子的第二位置中，波导通道不与端口连接。 当所述转子处于所述第二位置时，所述功率吸收材料邻近所述波导通道的一端定位，所述第二位置吸收频率范围内的电磁能量，并且当所述转子处于所述第二位置时，所述功率吸收材料减小所述隔离通道作为体积谐振器的趋势 第二名

公开(公告)号：EP1376748A1

公开(公告)日：2004-01-02

申请号：EP03253891.0

申请日：2003-06-19

Applicant: COM DEV LTD.

Inventor： Thomson, R Glen ,  Yu, Ming

IPC: H01P3/12

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约束条。 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。 约束条在预弯曲的窄侧壁的侧面上的第一和第二横向点处在波导体上耦合，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：EP1187247A3

公开(公告)日：2003-07-09

申请号：EP01120503.6

申请日：2001-08-28

Applicant: COM DEV LTD.

Inventor： Fitzpatrick, William ,  Yu, Ming ,  Smith, David ,  Sivadas, Apu

IPC: H01P1/208 ,  H01P7/06

CPC classification number: H01P1/208

Abstract: An externally temperature-compensated microwave resonator comprises a microwave resonator and an external temperature compensator. The microwave resonator is a multi-cavity waveguide. The cavities are configured side-by-side and coupled through irises. The external temperature compensator is oriented and configured to effect a change in volume of the cavities when the resonator and compensator undergo a temperature gradient. The compensator deflects a wall portion of the resonator to accordingly counteract a change in volume of the cavity caused by a temperature gradient.

公开(公告)号：EP0780998B1

公开(公告)日：2003-04-09

申请号：EP96119806.6

申请日：1996-12-10

Applicant: COM DEV LTD.

Inventor： Peach, Robert ,  Beauchamp, Gary ,  O'Donovan, Val

IPC: H04B7/185

CPC classification number: H04B7/18521

公开(公告)号：EP0905930A3

公开(公告)日：2003-01-15

申请号：EP98117378.4

申请日：1998-09-14

Applicant: COM DEV LTD.

Inventor： Lazaris-Brunner, Ken ,  Beauchamp, Gary ,  Tailor, Bharat

IPC: H04H1/00 ,  H04B7/185 ,  H04B7/204

CPC classification number: H04H40/90

Abstract: A multi-beam DBS satellite system capable of providing spectrally efficient regional programming is disclosed. The inventive system includes at least one DBS satellite having a repeater connected between multiple uplink antennas and multiple downlink antennas. The repeater has a switching processor and a formatting processor. The switching processor includes circuitry for filtering individual channels of information from the uplink frequency division multiplexed (FDM) beams received at the uplink antennas, and also includes circuitry for switching the channels of information to form a set of switched channels. These switched channels are then combined and routed to the formatting processor. The formatting processor converts the switched FDM information into a combined digital TDM signal that preferably corresponds to the DVB standard. Using this repeater, the present invention is capable of linking different geographical sources of programming information to multiple downlink beams in a flexible and spectrally efficient manner for direct transmission to home receivers.

公开(公告)号：EP1052721A3

公开(公告)日：2002-03-06

申请号：EP00109183.4

申请日：2000-05-08

Applicant: COM DEV LTD.

Inventor： Goulouev, Roussian

IPC: H01P1/211

CPC classification number: H01P1/211

Abstract: A corrugated waveguide filter has a plurality of coupled resonator cavities arranged in a horizontal or vertical manner. The filter may include an input transformer section and an output transformer section for matching the filter to external waveguide lines. Each resonator includes at least two extracted slots (or cavities) that are grouped in close proximity to each other, and which may be symmetrically or asymmetrically implemented in the waveguide. The resonators each contribute one reflection zero and two transmission zeros to the frequency response of the filter, the reflection zero being located within the pass-band of the filter, and the two transmission zeros located either at the high-side or low-side of the pass-band depending upon whether the resonator is a low-pass type or a high-pass type. The dimensions of each resonator, including the depth of the slots and the distance between the slots, determines the position of the reflection zero and whether the resonator is low-pass or high-pass.

Abstract translation: 波纹波导滤波器具有以水平或垂直方式布置的多个耦合的谐振腔。 滤波器可以包括用于将滤波器与外部波导线匹配的输入变压器部分和输出变压器部分。 每个谐振器包括至少两个提取的槽（或空腔），其彼此靠近彼此分组，并且其可以在波导中对称或不对称地实现。 谐振器各自为滤波器的频率响应贡献一个反射零点和两个传输零点，反射零点位于滤波器的通带内，两个传输零点位于滤波器的高边或低侧 该通带取决于谐振器是低通型还是高通型。 每个谐振器的尺寸，包括槽的深度和槽之间的距离确定反射零点的位置以及谐振器是低通还是高通。

公开(公告)号：EP0905930A2

公开(公告)日：1999-03-31

申请号：EP98117378.4

申请日：1998-09-14

Applicant: COM DEV LTD.

Inventor： Lazaris-Brunner, Ken ,  Beauchamp, Gary ,  Tailor, Bharat

IPC: H04H1/00 ,  H04B7/185

CPC classification number: H04H40/90

Abstract: A multi-beam DBS satellite system capable of providing spectrally efficient regional programming is disclosed. The inventive system includes at least one DBS satellite having a repeater connected between multiple uplink antennas and multiple downlink antennas. The repeater has a switching processor and a formatting processor. The switching processor includes circuitry for filtering individual channels of information from the uplink frequency division multiplexed (FDM) beams received at the uplink antennas, and also includes circuitry for switching the channels of information to form a set of switched channels. These switched channels are then combined and routed to the formatting processor. The formatting processor converts the switched FDM information into a combined digital TDM signal that preferably corresponds to the DVB standard. Using this repeater, the present invention is capable of linking different geographical sources of programming information to multiple downlink beams in a flexible and spectrally efficient manner for direct transmission to home receivers.

Abstract translation: 公开了能够提供光谱高效区域编程的多波束DBS卫星系统。 本发明的系统包括至少一个具有连接在多个上行链路天线和多个下行链路天线之间的中继器的DBS卫星。 中继器具有切换处理器和格式化处理器。 切换处理器包括用于从在上行链路天线处接收的上行链路频分多路复用（FDM）波束中的各个信道信号进行滤波的电路，并且还包括用于切换信息信道以形成一组切换信道的电路。 然后将这些交换的信道组合并路由到格式化处理器。 格式化处理器将切换的FDM信息转换成优选对应于DVB标准的组合数字TDM信号。 使用该中继器，本发明能够以灵活和频谱有效的方式将不同地理编程信息源连接到多个下行链路波束，以便直接发送到家庭接收机。

公开(公告)号：EP0760561A2

公开(公告)日：1997-03-05

申请号：EP96113034.1

申请日：1996-08-13

Applicant: COM DEV LTD.

Inventor： Peach, Robert ,  Miller, Nigel ,  Tailor, Bharat ,  Ali, Kamal ,  Beauchamp, Gary ,  Lam, Simon ,  Lazaris-Brunner, Ken

IPC: H04B7/204

CPC classification number: H04B7/2041

Abstract: A repeater for a multibeam communications satellite combines the features of coaxial channel interbeam switching and subchannelization of some of the channels. In one embodiment described, the input radio-frequency signals from the input beams are fed through the input multiplexers to form channels. Some, but not all, channels are subsequently subchannelized for interbeam switching. In another embodiment of the invention, a portion of the incoming radio frequency signals bypasses the input demultiplexer and is filtered for noise-limiting reasons, converted down to an intermediate frequency and then subchannelized using SAW filters. The specification also teaches that digital techniques can be used to obtain the same results. Especially in the case of satellites with a large number of beams and a large number of channels, it is not necessary to have full interbeam switching of all the subchannels derived from one channel: instead, the specification proposes the use of parallel configurations of smaller, less complex switching networks.

Abstract translation: 一种用于多波束卫星通信转发器结合了的一些通道同轴信道的波束间切换和子信道的特性。 在一个实施例中所描述的，从输入光束的输入射频信号通过多路转换器输入进料，以形成通道。 一些，但不是全部，信道随后用于subchannelized波束间切换。 在本发明的另一个实施例，输入的射频信号的一部分绕过所述输入多路分解，并过滤噪声限制性原因，转换至在中频，然后使用SAW滤波器subchannelized。 因此，规范教技术做数字可以用来获得相同的结果。 尤其是在具有大数量的光束和大量的信道的卫星的情况下，这是没有必要为具有从一个信道导出的所有子信道的全梁间切换：代替，本说明书提出了使用更小的平行构型， 较不复杂的交换网络。

公开(公告)号：EP0736923A1

公开(公告)日：1996-10-09

申请号：EP96302376.7

申请日：1996-04-03

Applicant: COM DEV LTD.

Inventor： Cameron, Richard J.

IPC: H01P1/20

CPC classification number: H01P1/20

Abstract: A microwave filter (78) has a plurality of resonant cavities (1-10) with each cavity containing a dielectric resonator (44). There are self-equalizing probes (80, 82) located between some of the cavities (3 and 8, 2 and 9), and a self-equalizing aperture (84) located between other of the cavities (4 and 7). A circulator (50) is connected to an output (52) of the filter. The circulator has an input/output (86) which is connected to an equalizer (D). The equalizer contains a dielectric resonator (54) that is slightly different from the dielectric resonators (44) of the filter (78) to permit the equalizer to be tuned at a slightly different frequency from the filter. The equalizer (D) and self-equalizing probes (80, 82) and aperture (84) are capable of being operated to reduce a dispersive slope of the filter. The filter operates in a single mode, although dual mode filters are also described. The electrical performance of the filter is superior to prior art filters, particularly in the wideband versions because the dispersive slope is reduced.

Abstract translation: 的微波过滤器（78）具有谐振腔（1-10）与每个腔包含电介质谐振器（44）的复数。 有一些位于空腔之间的自均衡探针（80，82）（3,8，2和9），以及位于其他的腔之间的自平衡孔（84）（4和7）。 循环器（50）在所述过滤器的输出端（52）被连接到。 环行器具有被在均衡器（D），连接到输入/输出（86）所有。 该均衡器包含一个介质谐振器（54）所做的是从过滤器（78），以允许在从所述过滤器略微不同的频率被调谐均衡器的介质谐振器（44）略有不同。 均衡器（D）和自均衡探针（80，82）和孔（84）能够被操作以减少过滤器的色散斜率。 因此，过滤器在一个单一的模式操作时，双模式虽然过滤器进行说明。 所述过滤器的电性能是优于现有技术的过滤器，特别是在宽带版本，因为色散斜率减小。

公开(公告)号：EP0691702A2

公开(公告)日：1996-01-10

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.