Agile microwave filter having at least one ferrite resonator

Details Agile microwave filter having at least one ferrite resonator Agile microwave filter having at least one ferrite resonator

1991-02-15

1993-02-02

Dzierzynski, Paul M.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333209, 333210, 3332192, H01P 1219

Patent

active

051840979

ABSTRACT:
An agile microwave filter tunable by ferrite is constituted as a filter having dielectric confinement resonators and as a result comprises an evanescent mode waveguide and resonant cylinders placed in the waveguide. In addition, the cylinders are made of ferrite and means are provided for applying an adjustable magnetic field thereto, thereby enabling the center frequency of the filter to be shifted.

REFERENCES:
patent: 2948868 (1960-08-01), Reeves
patent: 3001154 (1961-09-01), Reggia
patent: 3593210 (1971-07-01), Skedd
patent: 3919673 (1975-11-01), Kostelnick
patent: 4122418 (1978-10-01), Nagao
patent: 4143344 (1979-03-01), Nishikawa et al.
patent: 4578655 (1986-03-01), Etienne et al.
patent: 5032811 (1991-07-01), Nishikawa et al.
Patent Abstracts of Japan, vol. 11, No. 70 (E-485)(2517) Mar. 3, 1987, and JP-A-61 225903 (Fujitsu Ltd) Oct. 7, 1986.
IEEE Transactions on Microwave Theory and Techniques, vol. 29, No. 8, Aug. 1981, New York, USA, pp. 754-770; J. K. Plourde et al.: "Application of dielectric resonators in microwave components".

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