Filled resonant cavity filtering apparatus

Details Filled resonant cavity filtering apparatus Filled resonant cavity filtering apparatus

1986-12-04

1987-09-01

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333208, 333209, 333230, 333231, 333246, H01P 1207, H01P 700, H01P 508

Patent

active

046911790

ABSTRACT:
An apparatus that utilizes a solid, dielectric-filled waveguide filter in a microstrip circuit is dislosed. The microstrip circuit couples directly into and out from the waveguide filter through slot openings in waveguide filter walls without penetrating the interior of the waveguide. Adjustment of the coupling is accomplished through varying the length of the slot. Resonant frequency tuning of the filter is accomplished using additional slots, or by removing metallic plating from metallized cavities which extend into the waveguide core from a central region of a waveguide broad wall.

REFERENCES:
patent: 2704830 (1955-03-01), Rosencrans
patent: 2829348 (1958-04-01), Kostriza et al.
patent: 3265995 (1966-08-01), Hamasaki
patent: 4431977 (1984-02-01), Sokola et al.
patent: 4523162 (1985-06-01), Johnson
patent: 4533884 (1985-08-01), Hudspeth et al.
patent: 4562416 (1985-12-01), Sedivec
James, et al.-"Aperture Coupling Between Microstrip And Resonant Cavities", IEEE Trans, on Microwave Theory and Techniques, vol. MTT-25, No. 5, May 1977; pp. 392-398.

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