公开(公告)号：EP0949707A2

公开(公告)日：1999-10-13

申请号：EP99106828.9

申请日：1999-04-06

申请人： Murata Manufacturing Co., Ltd.

发明人： Sonoda, Tomiya, c/o Murata Mft Co. Ltd. (A170) ,  Hiratsuka, Toshiro, c/o Murata Mft Co. Ltd. (A170) ,  Kanagawa, Kiyoshi, c/o Murata Mft Co. Ltd. (A170)

IPC分类号： H01P1/203

CPC分类号： H01P1/20318

摘要： A dielectric filter includes a case (15), a substrate (6) having microstrip lines formed thereon, and a dielectric plate (3) having non-electrode parts (4a, 4b, 4c) serving as dielectric resonators. The case (15) includes a supporting part for supporting the lower surface of the dielectric plate (3) and includes a side wall surrounding the side faces of the dielectric plate (3) wherein the supporting part and the side wall are formed in an integral fashion. The substrate (6) is bonded to the case (15) and the dielectric plate (3) is mounted on the supporting part of the case. A metal cover (8) is then placed on the case (15) such that the opening of the case is closed with the cover.
In the dielectric filter constructed in the above-described manner, warping of the case (15) for supporting the dielectric plate (3) is suppressed and thus the stress exerted on the dielectric plate (3) is reduced. As a result, the dielectric plate (3) is prevented from being separated from the case (15) and also prevented from having a crack. The above-described structure also allows the dielectric filter to be formed into a small size. The invention also provides a duplexer and a communication device using such a dielectric filter.

摘要翻译： 介质滤波器包括壳体（15），其上形成有微带线的衬底（6）和具有用作介质谐振器的非电极部分（4a，4b，4c）的电介质板（3）。 壳体（15）包括用于支撑电介质板（3）的下表面的支撑部分，并且包括围绕电介质板（3）的侧面的侧壁，其中支撑部分和侧壁形成为整体 时尚。 基板（6）接合到壳体（15）上，电介质板（3）安装在壳体的支撑部分上。 然后将金属盖（8）放置在壳体（15）上，使得壳体的开口用盖封闭。 在以上述方式构成的介质滤波器中，抑制用于支撑电介质板（3）的壳体（15）的翘曲，因此施加在电介质板（3）上的应力减小。 结果，防止电介质板（3）与壳体（15）分离，并且也防止了开裂。 上述结构还允许将介质滤波器形成为小尺寸。 本发明还提供一种使用这种介质滤波器的双工器和通信设备。