Patent ID: 6147571
Filing Date: 2000-11-14
Classification: H01P,H03H

Abstract:
A multilayer bandpass filter comprising:a first filter unit comprising a plurality of stacked ceramic layers having a strip line resonator and a coupling electrode;a second filter unit comprising a plurality of stacked ceramic layers having a strip line resonator and a coupling electrode;a shield electrode inserted between said first and second filter units;said second filter unit being stacked under said first filter unit to define a stacked structure;a first input electrode for input of said first filter unit formed on an outer surface of said stacked structure and extending in the stacked direction;a first output electrode for output of said first filter unit formed on said outer surface of said stacked structure and extending in the stacked direction;a second input electrode for input of said second filter unit formed on said outer surface of said stacked structure and extending in the stacked direction;a second output electrode for output of said second filter unit formed on said outer surface of said stacked structure and extending in the stacked direction;a first ground electrode formed on said outer surface of said stacked structure and extending in the stacked direction and located between said first input electrode and said first output electrode; anda second ground electrode formed on said outer surface of said stacked structure and extending in the stacked direction and located between said second input electrode and said second output electrode;wherein said first and second input and output electrodes are provided separately and each have their end portions bent over the top and bottom surfaces of the stacked structure.