Patent ID: 6747527
Filing Date: 2004-06-08
Classification: H01P

Abstract:
A dielectric duplexer comprising:a dielectric block; an outer conductor on exterior surfaces of the dielectric block; a first filter forming a band eliminate filter which includes: a first plurality of conductive through holes formed in the dielectric block; a first antenna input/output electrode coupled to a first conductive through hole of the first plurality of conductive through holes; and a first input/output electrode coupled to a second conductive through hole of the first plurality of conductive through holes; a second filter which includes: a second plurality of conductive through holes formed in the dielectric block; a second antenna input/output electrode coupled to a first conductive through hole of the second plurality of conductive through holes; and a second input/output electrode coupled to a second conductive through hole of the second plurality of conductive through holes; and a phase circuit exterior to the dielectric block and provided between the antenna input/output electrode of the band eliminate filter and an antenna, wherein a phase is shifted by the phase circuit so that the first antenna input/output electrode of the band eliminate filter becomes open-circuited.