Dielectric resonator and filter utilizing a nonradiative dielectric waveguide device

A high-frequency band-pass filter device comprising:

• a plurality of dielectric resonators arranged at predetermined intervals, each of said dielectric resonators having:
• a dielectric substrate having a first surface and a second surface opposite from each other;
• a first electrode formed on the first surface of said dielectric substrate;
• a first opening formed in the first electrode on the first surface of said dielectric substrate;
• a second electrode formed on the second surface of said dielectric substrate:
• a second opening in the second electrode formed in substantially the same shape as said first opening and positioned substantially opposite from said first opening;
• a first conductor plate disposed by being spaced apart from the first surface of said dielectric substrate by a predetermined distance, a portion of said first conductor plate facing said first opening;
• and
• a second conductor plate disposed by being spaced apart from the second surface of said dielectric substrate by a predetermined distance, a portion of said second conductor plate facing said second opening;
• an input device for inputting a high-frequency signal to said dielectric resonators;
• and
• an output device for outputting a high-frequency signal from said dielectric resonators,
• wherein at least one of said input device and said output device comprises a nonradiative dielectric waveguide.