Patent ID: 6255921
Filing Date: 2001-07-03
Classification: H01P,Y02B

Abstract:
A dielectric waveguide filter comprising:a dielectric block having an outer surface covered with a conducting film, and comprising a pair of end surfaces, first and second opposing side surfaces extending between said end surfaces, and third and fourth opposing side surfaces extending between said first and second side surfaces;a pair of terminal electrodes disposed respectively on said outer surface and isolated from said conducting film;a pair of coupling holes formed in the dielectric block, each of said coupling holes having a coupling electrode disposed on an inner surface thereof, each of said coupling electrodes being connected to a corresponding one of said terminals electrodes;each of said coupling holes extending from the respective said terminal electrode to an adjacent one of said end surfaces and side surfaces, and being connected to said conducting film at said adjacent one of said surfaces;a pair of resonance holes extending between said first and second side surfaces, inner surfaces of said resonance holes being substantially free of conductive material, each said resonance hole defining a resonator electromagnetically coupled with a respective one of said coupling electrodes; anda pair of slots formed respectively in said third and fourth side surfaces, at locations along said dielectric block between said pair of resonance holes, and covered by said conducting film.