COUPLING STRUCTURE FOR NON-RADIATIVE DIELECTRIC LINE WITH RESONATOR, AND OSCILLATOR FILTER, DUPLEXER, COMMUNICATION EQUIPMENT USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide the coupling structure of a nonradiative dielectric line having excellent productivity with a resonator that relaxes the rapid decline of coupling characteristic with respect to the distance between a dielectric strip and a resonator. SOLUTION: This coupling structure has a nonradiative dielectric line composed of two plate-shaped conductor plates 11 almost in parallel, grooves provided at the facing positions of the two conductor plates, and dielectric strip 12 arranged so as to fit into those grooves with a resonator 13 arranged in the neighborhood of the dielectric strip 12. In this case, at least one of those two conductor plates 11 is provided with a recessed part 14 in the surrounding of the resonator 13.