Patent ID: 7084720
Filing Date: 2006-08-01
Classification: H01P,H05K

Abstract:
1. A bandpass filter, comprising: a plurality of spiral resonators that are electromagnetically coupled to each other, each spiral resonator having a terminal coupled to a ground; a bypass line in parallel with said plurality of spiral resonators, said bypass line having a bypass line input coupled to a first spiral resonator of said plurality of resonators and a bypass line output coupled to a second spiral resonator of said plurality of resonators; an input, coupled to said first spiral resonator; and an output, coupled to said second spiral resonator; said bypass line input formed from an outer segment of said first spiral resonator that is in-parallel and electromagnetically coupled with a first portion of said bypass line, said bypass line output formed from an outer segment of said second spiral resonator that is arranged in-parallel and electromagnetically coupled with a second portion of said bypass line, a third portion of said bypass line coupled between said first portion and said second portion, wherein said first, second, and third portions of said bypass line have a substantially constant trace width, and wherein said third portion of said bypass line is electromagnetically isolated from at least one of said plurality of spiral resonators that are between said first spiral resonator and said second spiral resonator.