Patent ID: 6861928
Filing Date: 2005-03-01
Classification: H01P

Abstract:
1. A dielectric resonator filter comprising: a plurality of dielectric resonators; an enclosure enclosing the plurality of dielectric resonators to function as a shield against an electromagnetic field; and a plurality of resonance-frequency tuning means provided on a one-by-one basis for the plurality of dielectric resonators, each of the plurality of resonance-frequency tuning means including a conductor plate disposed in a space enclosed by the enclosure to have a first surface opposed to a surface of the corresponding one of the dielectric resonators and a second surface opposed to an inner surface of the enclosure, the resonance-frequency tuning means being capable of changing distances between the conductor plates and the dielectric resonators, the conductor plate of at least one of the plurality of resonance-frequency tuning means having a size different from sizes of the conductor plates of the other resonance-frequency tuning means.