Patent ID: 7084721
Filing Date: 2006-08-01
Classification: H01P

Abstract:
1. An RF circuit component comprising: a substrate with a principal surface; and a plurality of resonators, including a first resonator, a second resonator and a third resonator, which are arranged on the principal surface of the substrate so as to be coupled in series together, wherein each of the first, second and third resonators is made of a conductor supported on the substrate, and wherein the resonant modes of each of the first, second and third resonators include two fundamental resonant modes that are polarized perpendicularly to each other within a plane that is defined parallel to the principal surface of the substrate, said fundamental resonant modes having two mutually different resonant frequencies, and wherein the second resonator is arranged between the first and third resonators, and the polarization direction of one of the fundamental resonant modes of the second resonator defines an angle greater than 0 degrees but equal to or smaller than 45 degrees with respect to that of its associated fundamental resonant mode of one of the first resonator and the third resonator, wherein the first, second and third resonators are coupled by said one of the fundamental resonant modes.