Patent ID: 7116186
Filing Date: 2006-10-03
Classification: H04B

Abstract:
1. A dual-band bandpass filter having a first pass band and a second pass band respectively corresponding to a first frequency and a second frequency, the dual-band bandpass filter comprising: a first pair of resonators comprising a first resonator and a second resonator, both of which share a first grounding transmission line having one end grounded, wherein the first resonator and the second resonator generate coupling by the first grounding transmission line; a second pair of resonators comprising a third resonator and a fourth resonator, both of which share a second grounding transmission line having one end grounded, wherein the third resonator and the fourth resonator generate coupling by the second grounding transmission line; and a first coupling element coupled between the first pair of resonators and the second pair of resonators to generate coupling with the first pair of resonators and the second pair of resonators such that the dual-band bandpass filter has the first pass band and the second pass band.