HIGH-FREQUENCY FILTER

摘要

PROBLEM TO BE SOLVED: To implement an inexpensive high-frequency filter which is ultra-compact and has little insertion loss in the band and has a sharp attenuation characteristic and can ensure a large amount of attenuation, and is easy to expand the pass band and cutoff region.;SOLUTION: The high-frequency filter is equipped with a plurality of branch lines which are provided in a direction intersecting with a transmission line of a high-frequency signal and have each a coupling portion which electromagnetically couples with those of other branch lines. The high-frequency filter filters a specific frequency component from the high-frequency signal. The plurality of branch lines are formed asymmetrically.;COPYRIGHT: (C)2010,JPO&INPIT