Keating & Bennett, LLP
Duplexer having laminated structure
A duplexer having a laminated structure includes a first three-stage band-pass filter having parallel LC resonators, and a second three-stage band-pass filter having parallel LC resonators. The first and second three-stage band-pass filters are coupled through impedance matching patterns. An inductor of each of the resonators is defined by via-holes formed on insulator sheets which are connected in sequence in the laminating direction of the sheets.
Murata Manufacturing Co., Ltd.
H
H01P
inventional
Sadayuki Hiroko Noboru
Matsumura Nomura Kato