公开(公告)号：EP0923150A1

公开(公告)日：1999-06-16

申请号：EP98309241.2

申请日：1998-11-11

Applicant: COM DEV LTD.

Inventor： Thomson, Glen R.

IPC: H01P1/208 ,  H01P7/06

CPC classification number: H01P1/2084 ,  H01P1/208

Abstract: A device for changing the operating frequency of a microwave filter is mounted in a wall (6) of a cavity (8) of the filter. The device has a bellows that is located inside the cavity. The bellows contains an elongated member (16) that extends outside the cavity to an actuator (24). The actuator can be temperature dependent and moves the elongated member either further into or further out of the cavity as desired. An interior end (18) of the elongated member can be connected to the bellows or it can simply be in contact with the bellows without being connected. When the elongated member is in contact with the bellows and is not connected, when the elongated member moves outward, the bellows will return to a rest position due to its inherent spring. The bellows is sealed from an interior of the cavity. Filters using the device have one device located primarily for each mode in each cavity of the filter.

Abstract translation: 一种用于改变微波滤波器的工作频率装置被安装在所述过滤器的腔体（8）的壁（6）。 该装置具有一个波纹管并位于空腔内部。 波纹管包含细长构件（16）做了延伸的腔，以在致动器（24）的外部。 该致动器可以是温度依赖性的，并且细长构件移动要么进一步移入或移出腔室根据需要进一步的。 细长构件的内部端部（18）可以被连接到波纹管，或者它可以简单地是与波纹管接触，而无需连接。 当细长构件与所述波纹管接触，并且没有连接，当所述细长部件向外移动时，波纹管将返回到静止位置，由于其固有的弹簧。 波纹管从所述腔体的内部被密封。 使用该装置过滤器具有位于主要用于在过滤器的每个空腔每个模式一个设备。