Planar dual-mode cavity filters including dielectric resonators

Details Planar dual-mode cavity filters including dielectric resonators Planar dual-mode cavity filters including dielectric resonators

1984-11-02

1987-03-24

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333227, 333230, H01P 1209

Patent

active

046528431

ABSTRACT:
A bandpass filter has a plurality of cascade cavities that operate in a dual-mode and are mounted in a planar relationship to one another. Each cavity contains a dielectric resonator and resonates at its resonant frequency in two HE.sub.11.delta. modes. An iris is located between adjacent cavities and contains an aperture that can independently control inter-cavity coupling. The dielectric resonator is cylindrical in shape and an adjustable metallic plunger is located in a wall of each cavity so that the cavity can be tuned over a relatively broad range. The filter has good mechanical and thermal stability as well as being extremely flexible in the arrangement of cavities.

REFERENCES:
patent: 4028651 (1977-06-01), Leetma
patent: 4129846 (1978-12-01), Mok
patent: 4180787 (1979-12-01), Pfitzenmaier
patent: 4433146 (1984-06-01), Fiedziuszko
patent: 4484162 (1984-11-01), Kamada et al.
patent: 4489293 (1984-12-01), Fiedziuszko

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