公开(公告)号：US5589807A

公开(公告)日：1996-12-31

申请号：US475656

申请日：1995-06-07

Applicant: Wai-Cheung Tang

Inventor： Wai-Cheung Tang

IPC: H01P1/208 ,  H01P7/06

CPC classification number: H01P1/2082

Abstract: Multi-mode waveguide filters are temperature compensated using dielectric material contained within at least one cavity 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 so that the operating frequency of the filter remains substantially constant with temperature. The filter can have one or more dual-mode or triple-mode cavities. In a method of constructing and compensating a filter, the amount of dielectric material is selected so that the dielectric material does not resonate at the operating frequency of the cavity, 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.

Abstract translation: 多模波导滤波器使用包含在滤波器的至少一个空腔内的介电材料进行温度补偿。 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的介电常数变化引起的工作频率随温度的变化平衡，使得过滤器的工作频率保持基本恒定 与温度。 滤波器可以具有一个或多个双模或三模腔。 在构造和补偿滤波器的方法中，选择介电材料的量使得介电材料在空腔的工作频率下不共振，在构造每个空腔之后，空腔中的电介质材料的量是可调节的。 腔体以每种模式包含在腔体中的固定量的电介质材料操作，并且确定具有温度的过滤器的工作频率的变化。 如果过滤器的工作频率的变化不在可接受的水平，则每种模式的空腔中包含的电介质材料的量会发生变化，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。

公开(公告)号：US5489880A

公开(公告)日：1996-02-06

申请号：US238504

申请日：1994-05-05

Applicant: Arvind Swarup

Inventor： Arvind Swarup

IPC: H03H7/48 ,  H01P5/12

CPC classification number: H03H7/48

Abstract: A power divider has a microstripline circuit with bandpass filters at each output that are lumped element printed bandpass filters. The filters widen the isolation bandwidth of the divider. Power dividers can be reversed for use as power combiners.

Abstract translation: 功率分配器具有微带电路，每个输出端具有带通滤波器，是集总元件印刷的带通滤波器。 滤波器扩大分频器的隔离带宽。 功率分配器可以反向使用作为功率组合器。

公开(公告)号：US4488132A

公开(公告)日：1984-12-11

申请号：US448970

申请日：1982-12-13

Applicant: Adrian V. Collins ,  Patrick M. Naraine

Inventor： Adrian V. Collins ,  Patrick M. Naraine

IPC: H01P1/208 ,  H01P1/30 ,  H01P7/06

CPC classification number: H01P1/2082 ,  H01P1/30 ,  H01P7/06

Abstract: A resonant microwave cavity 2 has a bi-metal end cap 4 or a tri-metal end cap 26. The end caps 4, 26 include irises 10, 28. The end caps are affixed to walls of the cavity 2 in the usual manner. As temperature varies, the end caps or irises expand into or out of the cavity to compensate for the increase or decrease in length of the cavity walls due to variations in temperature. The internal volume of the cavity is maintained substantially constant. When a bi-metal end cap is used, each layer of metal has a different coefficient of expansion. When a tri-metal end cap is used, the center layer has the highest of coefficient of thermal expansion.

Abstract translation: 谐振微波腔2具有双金属端盖4或三金属端盖26.端盖4,26包括虹膜10,28。端盖以常规方式固定到空腔2的壁。 随着温度的变化，端盖或虹膜膨胀进入或流出空腔，以补偿由于温度变化引起的腔壁长度的增加或减少。 空腔的内部体积保持基本上恒定。 当使用双金属端盖时，每层金属具有不同的膨胀系数。 当使用三金属端盖时，中心层具有最高的热膨胀系数。

公开(公告)号：US4228411A

公开(公告)日：1980-10-14

申请号：US26765

申请日：1979-04-03

Applicant: Robert G. Harrison

Inventor： Robert G. Harrison

IPC: H03B19/18 ,  H01P1/20

CPC classification number: H03B19/18

Abstract: The invention relates to a broad bandwidth frequency divider which converts a band of input frequencies into a band of output frequencies such that each output frequency is one half the corresponding input frequency. The frequency divider has a first rectangular waveguide which propagates the band of input frequencies and a second larger rectangular waveguide which propagates the band of output frequencies. The two waveguides are orthogonally disposed with respect to one another and are interconnected by a slot provided in a common wall. Two nonlinear capacitive reactances are mounted in the first waveguide, one on each side of the slot, forming a transverse resonator. When the two nonlinear reactances are pumped in phase at the input frequency, parametric subharmonic resonance can be excited transversely at one half the input frequency such that the nonlinear reactance voltages are 180.degree. out of phase at the output frequency. A corresponding subharmonic voltage developed across the slot is coupled directly into the output waveguide. The symmetry of the arrangement isolates the input frequency from the output port whereas the low-frequency cutoff property of the first waveguide isolates the output frequency from the input port. An arrangement is provided for biasing the nonlinear capacitive reactances.

Abstract translation: 本发明涉及一种宽带分频器，其将输入频率的频带转换成输出频率的频带，使得每个输出频率是相应输入频率的一半。 分频器具有传播输入频率带的第一矩形波导和传播输出频率带的第二较大的矩形波导。 两个波导相对于彼此正交地布置并且通过设置在公共壁中的槽相互连接。 两个非线性电容电抗器安装在第一波导中，一个在槽的每一侧上，形成横向谐振器。 当两个非线性电抗在输入频率同相泵浦时，参数次谐波可以在输入频率的一半横向激励，使得非线性电抗在输出频率下相位相差180°。 横跨槽形成的相应次谐波电压直接耦合到输出波导中。 该布置的对称性将输入频率与输出端口隔离，而第一波导的低频截止特性将输出频率与输入端口隔离。 提供了用于偏置非线性电容电抗的装置。