Patent ID: 6703912
Filing Date: 2004-03-09
Classification: H01P

Abstract:
A dielectric resonator device comprising a coaxial dielectric resonator (2), the coaxial dielectric resonator (2) comprising:a dielectric block (21) having a bore (22) extending therethrough, an outer conductor layer (24) formed on an outer peripheral surface of the dielectric block (21), an inner conductor layer (23) formed on the dielectric block (21) over an inner peripheral surface thereof defining the bore (22), a short-circuiting conductor layer (25) formed on the dielectric block (21) over an end face thereof where the bore (22) has an opening and providing a short circuit between the outer conductor layer (24) and the inner conductor layer (23), and a separated conductor layer (3) formed on the outer peripheral surface of the dielectric block (21) and electrically separated from the outer conductor layer (24), the separated conductor layer (3) of the resonator (2) having connected thereto a switch SW by which the capacitance Câ€² provided between the separated conductor layer (3) and the inner conductor layer (23) is connected to or disconnected from the capacitance C provided between the outer conductor layer (24) and the inner conductor layer (23) upon switching to thereby vary the resonance frequency of the resonator (2).