Patent ID: 7394334

Claim:
A dielectric resonance apparatus, comprising: a TM010-mode resonator comprising a dielectric substrate having a first electrode arranged on a front surface and a second electrode arranged on a back surface thereof, wherein the electrode arranged on the front surface is substantially circular; an external substrate implemented on a plane of the back surface of the dielectric substrate and having a surface facing the back surface of the dielectric substrate, a pair of signal lines arranged on said surface of the external substrate, each of which has an end portion and each of which is connected to the TM010-mode resonator, and a magnetic-field coupler arranged on the back surface of the dielectric substrate and adapted to magnetically couple the TM010-mode resonator to the signal lines, wherein the magnetic-field coupler comprises a coupling line having opposite ends electrically connected to the signal lines and which extends through a position facing the substantially circular electrode toward an end portion of the dielectric substrate, and wherein the second electrode comprises two back-surface electrodes each of which is disposed on a different side of the coupling line in a width direction and spaced therefrom such that an isolation gap is provided between the coupling line and each of the two back-surface electrodes.