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US08260242B2 Bandpass filter, and radio communication module and radio communication device using same 有权
带通滤波器，无线电通信模块和使用它的无线电通信装置

Bandpass filter, and radio communication module and radio communication device using same
Abstract:
A bandpass filter, and a radio communication module and device using the same are disclosed. Provided is the bandpass filter in which resonant electrodes (30a, 30b, 30c) are disposed in an interdigital manner inside of an annular ground electrode (23) disposed in one interlayer of a laminate (10) composed of a plurality of dielectric layers (11) on the upper and lower surfaces of which first and second ground electrodes (21, 22) are disposed, and in which an input coupling electrode (40a) facing the resonant electrode (30a) in an input stage in the interdigital manner, an output coupling electrode (40b) facing the resonant electrode (30b) in an output stage in the interdigital manner, and an input/output coupling conductor (71) which faces the input coupling electrode (40a), the resonant electrode (30a) in the input stage, the output coupling electrode (40b), and the resonant electrode (30b) in the output stage and is subjected to electromagnetic field coupling therewith are disposed in the other interlayer of the laminate (10).
Abstract(Chinese):

公开了一种带通滤波器以及使用该带通滤波器的无线通信模块和装置。 提供了一种带通滤波器，其中谐振电极（30a，30b，30c）以叉指方式设置在设置在由多个电介质层（11）构成的层叠体（10）的一个中间层中的环形接地电极（23）的内部 ），其中设置有第一和第二接地电极（21,22）的上表面和下表面，并且其中以指数方式在输入级面对着谐振电极（30a）的输入耦合电极（40a），输出 在交叉指示的输出级面对共振电极（30b）的耦合电极（40b）和面向输入耦合电极（40a）的输入输出耦合导体（71），输入端的谐振电极（30a） 输出级中的输出耦合电极（40b）和谐振电极（30b）被设置在层叠体（10）的另一层中。

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