BANDPASS FILTER, AND WIRELESS COMMUNICATION MODULE AND WIRELESS COMMUNICATION DEVICE USING THE SAME

摘要

A bandpass filter, which has two passbands: a super-wide band and an appropriately wide band, and a wireless communication module and a wireless communication device that use the bandpass filter. In the bandpass filter, first resource electrodes (30a,30b,30c) are arranged in an inter-digital manner in a first layer of a multilayer body (10); a plurality of second resource electrodes (31a,31b,31c,31d) are arranged in an inter-digital manner in a second layer; an input coupling electrode (40a) and an output coupling electrode (40b) are arranged in a third layer located between the first and second layers. The input coupling electrode (40a) is opposed in an inter-digital manner to the first resource electrode (30a) of the input stage and to the second resource electrode (31a) of the input stage. The output coupling electrode (40b) is opposed in an inter-digital manner to the first resource electrode (30b) of the input stage and to the second resource electrode (31b) of the output stage.