Wireless communication filter operating at low temperature,申请号US19960629349-传众专利搜索

Wireless communication filter operating at low temperature

申请公布号：US6178339(B1)

申请号：US19960629349

申请日期：1996.04.08

申请公布日期：2001.01.23

申请人：

MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人：SAKAI MASAHIRO;HIGASHINO HIDETAKA;SETSUNE KENTARO

分类号：H01P1/203;H01P1/213;(IPC1-7):H01P1/213;H01B12/02

主分类号：H01P1/203

摘要：A high power filter apparatus which is used in a mobile communication base station or the like is provided wherein the temperature stability and frequency selection are excellent, an insertion loss is small, the size is small, power consumption is low and costs are low. A shield case block comprises signal input and output portions, and a plurality of closed spaces which house a filter element connected between the signal input and output portions. A cooling plate is provide in a heat insulating container which houses the shield case block. The shield case block is fixed to the cooling plate in the thermal contact state. Each filter element is place almost in parallel. A cylindrical hole having an axis which is almost parallel with the face of the filter element penetrates the shield case block. A ground rod made of a conductor which changes the volume of the closed space is provided on the inner end portion of a movable member which moves in the axial direction of the cylindrical hole.