FILTER, FILTERING METHOD, AND COMMUNICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To adjust the pass bandwidth as well as the center frequency in the pass band in a filter. SOLUTION: A first resonance line 12 and a second resonance line 12b each extending from an input point 13 to which a high-frequency signal is input are provided, and a propagation length L1of the first resonance line 12a and a propagation length L2of the second resonance line 12b are set to L1=[λ1/4]×n and L2=[λ2/4]×n. Here, λ1and λ2are wavelengths of specific high-frequency signals and n is a positive odd number. COPYRIGHT: (C)2010,JPO&INPIT