公开(公告)号：US5585331A

公开(公告)日：1996-12-17

申请号：US348859

申请日：1994-11-28

Applicant: Raafat R. Mansour ,  Van Dokas

Inventor： Raafat R. Mansour ,  Van Dokas

IPC: H01P1/208 ,  H01P1/201 ,  H01P7/10

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

Abstract: Microwave bandpass filters contain dielectric resonators mounted in dielectric blocks, which are in turn mounted in cavities. There can be more than one dielectric resonator per cavity. Significant size reduction has been achieved over prior art filters. The filters can be operated at cryogenic temperatures and since the results attainable at cryogenic temperatures are repeatable, the filters can be tuned at cryogenic temperatures and returned to room temperature before being returned to cryogenic temperatures for operating purposes. When operated at cryogenic temperatures, the filters contain shorting plates having high temperature superconducting material thereon. The filters can be constructed with various configurations and can be operated in either a single mode or a dual-mode. Previous single mode or dual-mode dielectric resonator filters are larger in size and mass than the filters of the present application.

Abstract translation: 微波带通滤波器包含安装在介质块中的介质谐振器，它们依次安装在空腔中。 每个腔可以有多个介质谐振器。 与现有技术的过滤器相比，已经实现了显着的尺寸减小。 过滤器可以在低温下运行，并且由于可以在低温下实现的结果是可重复的，因此过滤器可在低温下进行调节并返回到室温，然后返回到低温温度进行操作。 当在低温运行时，过滤器包含其上具有高温超导材料的短路板。 滤波器可以用各种配置构造，并且可以在单模或双模操作。 以前的单模或双模介质谐振器滤波器的尺寸和质量比本申请的滤波器大。

公开(公告)号：US5499006A

公开(公告)日：1996-03-12

申请号：US238484

申请日：1994-05-05

Applicant: Klaus G. Engel ,  Regina Kwiatkowska

Inventor： Klaus G. Engel ,  Regina Kwiatkowska

IPC: H01P1/12 ,  H01H33/00

CPC classification number: H01P1/12

Abstract: A radio frequency switch operates by permanent magnets located in a rotatable actuator. The permanent magnets of the actuator are arranged in groups so that there is at least one magnet in each group that has an opposite polarity to another magnet in the same group. The permanent magnets within the same group are located adjacent to one another. Conductors within an RF cavity have permanent magnets mounted thereon where all of the magnets have the same polarity. The switch can be moved from a first position to a second position by moving the actuator a distance not exceeding 40.degree. and, preferably from 10.degree. to 30.degree.. In the first position, one permanent magnet of one group interacts with the magnet on the conductor to move the conductor. In the second position, another magnet of the same group interacts with the magnet of the conductor to move the conductor. Since the actuator is moved a relatively short distance, the actuator can be moved by a relatively small step motor or the step motor can be replaced by electromagnets in some embodiments. The number of groups of magnets and the number of magnets in each group will vary depending on the type of switch. C-switches, single-pole double-throw switches and T-switches are described. Previous switches have actuators that move much more than 40.degree. between positions, therefore requiring a larger, heavier and more expensive step motor or other mover.

Abstract translation: 无线电频率开关由位于可旋转致动器中的永磁体操作。 致动器的永磁体被分组地布置，使得每组中至少有一个与同一组中的另一个磁体具有相反极性的磁体。 同一组内的永磁体彼此相邻。 RF腔内的导体具有安装在其上的永磁体，其中所有磁体具有相同的极性。 通过使致动器移动不超过40°，优选10°至30°的距离，开关可以从第一位置移动到第二位置。 在第一位置，一组的一个永磁体与导体上的磁体相互作用以移动导体。 在第二位置，同一组的另一磁体与导体的磁体相互作用以移动导体。 由于致动器移动相对较短的距离，因此在一些实施例中致动器可以通过相对较小的步进电动机移动，或者步进电动机可被电磁铁代替。 每组中的磁体组数和磁体数量将根据开关的类型而变化。 描述了C开关，单刀双掷开关和T开关。 以前的开关具有在位置之间移动超过40°的致动器，因此需要更大，更重和更昂贵的步进电机或其他移动器。

公开(公告)号：US5065125A

公开(公告)日：1991-11-12

申请号：US517590

申请日：1990-05-02

Applicant: R. Glenn Thomson ,  Paul Y. Tsoi

Inventor： R. Glenn Thomson ,  Paul Y. Tsoi

IPC: H01H36/00 ,  H01P1/12

CPC classification number: H01P1/125 ,  H01H36/0073

Abstract: C-, T- and S-switches have a connector or reed in each conducting path. The connector or reed contains a support for a permanent magnet. All of the magnets of the connectors have the same polarity. The connectors, supports and permanent reed magnets in the supports are contained within an RF cavity housing, which can be completely sealed from an actuator or, alternatively, the housing can be open to the actuator. The actuator has a circular shape and contains permanent magnets 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 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 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：US4922213A

公开(公告)日：1990-05-01

申请号：US255637

申请日：1988-10-11

Applicant: Subir Ghosh

Inventor： Subir Ghosh

IPC: H01P1/165 ,  H01Q15/24

CPC classification number: H01Q15/24 ,  H01P1/165

Abstract: A polarizer has a plurality of short waveguide sections arranged so that rectangular-shaped sections alternate with circular-shaped sections. The two end sections are both circular. The rectangular sections have a minimum size at least as large as the minimum diameter of the circular sections. The size of the rectangular sections progressively changes from section to section with all sections of the polarizer being symmetrical about the centre point of the polarizer. The length of each section is less than half a wavelength at maximum operating frequency. The structure of the polarizer is simple and straightforward so that computer-aided analysis and design methods can easily be used. The polarizer has a relatively large bandwidth and can interface directly with corrugated circular waveguides.

Abstract translation: 偏振器具有多个短波导部分，其布置成使得矩形部分与圆形部分交替。 两个端部都是圆形的。 矩形截面具有至少与圆形截面的最小直径一样大的最小尺寸。 矩形部分的尺寸逐渐变化，偏振片的所有部分都围绕偏振片的中心点对称。 每个部分的长度在最大工作频率下小于波长的一半。 偏振器的结构简单直观，可以方便地使用计算机辅助分析和设计方法。 偏振器具有相对较大的带宽并且可以直接与波形圆形波导接合。

公开(公告)号：US4881051A

公开(公告)日：1989-11-14

申请号：US227788

申请日：1988-08-03

Applicant: Wai-Cheung Tang ,  Richard J. Cameron ,  David M. T. Bryant

Inventor： Wai-Cheung Tang ,  Richard J. Cameron ,  David M. T. Bryant

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

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

Abstract: A two, three or four channel multiplexer can be operated in the TE.sub.01.delta. or HE.sub.11.delta. modes, each channel of the multiplexer has one bandpass filter, with each filter usually having a plurality of cavities. One cavity of each filter is a common cavity with all of the other filters of the multiplexer. The common cavity contains one independent dielectric quarter-cut or half-cut image resonator for each filter representing a channel of the multiplexer. Each resonator is mounted on a suitable support the common cavity provides a common junction and contains a loop coupling to couple electromagnetic energy between the various channels. The multiplexer has at least one input and at least one output. Previous microwave multiplexers have a plurality of bandpass filters arranged on a coaxial manifold. With the multiplexer of the present invention, the manifold can be eliminated. Further, at the S-band or L-band, substantial weight and volume savings can be achieved using the multiplexer of the present invention without sacrificing performance. This can be very important for space applications.

公开(公告)号：US4864308A

公开(公告)日：1989-09-05

申请号：US119717

申请日：1987-11-12

Applicant: Anthony R. Raab ,  William Thorpe ,  Thomas P. G. Healy

Inventor： Anthony R. Raab ,  William Thorpe ,  Thomas P. G. Healy

IPC: G01K11/00 ,  H01Q3/22

CPC classification number: G01K11/006 ,  H01Q3/22

Abstract: An electronically scanned radiometer has a dispersive serpentine antenna with one or two ports. A mixer is connected to each port with each mixer being fed by a variable frequency local oscillator. Each oscillator provides the mixer to which it is connected with a drive signal that varies in frequency. The antenna most efficiently receives one or more beams through radiators at an angle that varies with the frequency of the drive signal at the mixer. An output is received at each port and is appropriately displayed. When the serpentine has two ports the radiometer can be operated at two orthogonal polarizations. The frequency being fed to each mixer can be varied in various predetermined patterns. Scanning of the beam can be effected by changing the frequency of observation without physically rotating the antenna. Also two simultaneous beams rotating in opposite directions with independent motions can be achieved.

Abstract translation: 电子扫描辐射计具有带有一个或两个端口的分散蛇形天线。 混频器连接到每个端口，每个混频器由可变频率本地振荡器馈送。 每个振荡器提供与其频率变化的驱动信号连接的混频器。 天线最有效地以与混合器处的驱动信号的频率变化的角度通过辐射器接收一个或多个光束。 在每个端口接收到一个输出，并被适当显示。 当蛇形管具有两个端口时，辐射计可以在两个正交偏振下操作。 馈送到每个混合器的频率可以以各种预定模式改变。 可以通过改变观测频率而不使物理旋转天线来实现光束的扫描。 也可以实现具有独立运动的相反方向旋转的两个同时的光束。

公开(公告)号：US4668953A

公开(公告)日：1987-05-26

申请号：US725252

申请日：1985-04-19

Applicant: Anthony R. Raab

Inventor： Anthony R. Raab

IPC: H01P5/16 ,  H01P5/12 ,  H01Q21/22 ,  G01S3/22 ,  G01S3/24 ,  G01S3/26

CPC classification number: H01P5/12

Abstract: A Beam-forming Network includes a plurality of directional couplers and phase shifters and which can interconnect both a transmitter and a receiver to the same group of radiating elements of an antenna even though the transmitter frequency band is different and well spaced from the receiver frequency band. This is accomplished, in accordance with the invention, by using directional couplers each of which has a variable response over a wide band of frequencies but which is designed so that its response over the transmitter frequency band is stable and its response over the receiver frequency band is also stable.

Abstract translation: 波束形成网络包括多个定向耦合器和移相器，并且即使发射机频带不同并且与接收机频带相隔很远，它们也可以将发射机和接收机互连到天线的同一组辐射元件 。 根据本发明，通过使用各自在宽频带上具有可变响应但是被设计成使得其在发射机频带上的响应是稳定的并且其在接收机频带上的响应的定向耦合器来实现的 也是稳定的。

公开(公告)号：US4646039A

公开(公告)日：1987-02-24

申请号：US667822

申请日：1984-11-02

Applicant: Abdelmegid K. Saad

Inventor： Abdelmegid K. Saad

IPC: H01P1/207 ,  H01P1/211

CPC classification number: H01P1/207

Abstract: A waveguide lowpass filter operates in at least two evanescent modes. The filter has successive ridges with a space between said ridges. The ridges are associated with parallel capacitance and a space between them is associated with series inductance in the TE.sub.10 mode. Each ridge is top-loaded so that series capacitance can occur in a TM.sub.11 mode in parallel to said series inductance. The filters of the present invention can be made smaller than previous evanescent lowpass filters and can achieve improved results.

Abstract translation: 波导低通滤波器在至少两个渐逝模式下工作。 过滤器具有在所述脊之间具有空间的连续脊。 脊与并联电容相关联，它们之间的空间与TE10模式中的串联电感相关联。 每个脊是顶部加载的，使得串联电容可以在与所述串联电感并联的TM11模式中发生。 本发明的滤波器可以比先前的渐逝低通滤波器更小，并且可以实现改进的结果。

公开(公告)号：US4644305A

公开(公告)日：1987-02-17

申请号：US804079

申请日：1985-12-03

Applicant: Wai-Cheung Tang ,  Joseph Frenna ,  David Siu

Inventor： Wai-Cheung Tang ,  Joseph Frenna ,  David Siu

IPC: H01P1/208 ,  H01P1/207 ,  H01P7/06

CPC classification number: H01P1/2082

Abstract: An odd order bandpass filter has at least one cavity resonating at its resonant frequency in three independent orthogonal modes. The filter has at least one feedback coupling that is made to resonate and change sign at a center frequency. When the filter has two cavities, one being a triple cavity and the other being a dual mode cavity, the filter can be operated to achieve an elliptic function response. Also, the filter of the present invention can achieve a weight and volume reduction when compared to six-pole dual mode filters.

Abstract translation: 奇数阶带通滤波器在三个独立的正交模式中具有在其谐振频率处谐振的至少一个空腔。 滤波器具有至少一个反馈耦合，其使得在中心频率处共振并改变符号。 当过滤器具有两个空腔时，一个是三腔，另一个是双模腔，可以操作该过滤器以实现椭圆函数响应。 此外，与六极双模式滤波器相比，本发明的滤波器可以实现重量和体积减小。

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.