Microwave resonator for operation in the whispering-gallery mode

Details Microwave resonator for operation in the whispering-gallery mode Microwave resonator for operation in the whispering-gallery mode

1988-06-01

1991-02-12

Lee, Benny T.

Wave transmission lines and networks

Resonators

3332191, H01P 708, H01P 710

Patent

active

049927639

ABSTRACT:
A microwave resonator for operation in the whispering-gallery mode is constituted by a resonant element included in a flat disk having a diameter (2a) which is considerably larger than its thickness (2d). An electromagnetic wave which propagates within the disk is confined between the periphery of this latter and a so-called caustic surface having a smaller radius (a.sub.c). The wave does not radiate to the exterior and the resonator can be placed on a dielectric or metallic substrate. The disk can be hollowed-out within the caustic surface. A resonator can be simulated within the thickness of a dielectric substrate by at least one metallic ring which forms a magnetic short-circuit with the ground plane. Excitation is produced by microstrips or by dielectric image waveguides.

REFERENCES:
patent: 3558213 (1971-01-01), Marcatili
patent: 4097826 (1978-06-01), Knox et al.
patent: 4727342 (1988-02-01), Ishikawa et al.
patent: 4800350 (1989-01-01), Bridges et al.
Shindo et al., "Low-Loss Rectangular Dielectric Image Line for MM-Wave IC's"; IEEE Trans on Microwave Theory and Techniques; vol. MTI-26, No. 10, Oct. 1978, pp. 747-751.
Jiao, X.A. et al.; "Whispering-Gallery Modes of Dielectric Structures: Applications to MM-Wave Bandstop Filters", IEEE Trans on Microwave Theory & Techniques, MTT35, No. 12, Dec. 1987, pp. 1169-1175.
IEEE Proceedings Section A A I, vol. 129, no. 4, Part H, Aug. 1982, pp. 183-187, Old Woking, Surrey, GB;C. Vedrenne et al., "Whispering-Gallery Modes of Dielectric Resonators" in its entirety.

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