Slot line tunable bandpass filter

Details Slot line tunable bandpass filter Slot line tunable bandpass filter

1985-08-07

1988-02-02

Buczinski, Stephen C.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333235, H01P 1203

Patent

active

H00004324

ABSTRACT:
A tunable bandpass filter comprising a pair of slot line resonant cavities formed in a metallic film covering the planar surface of a ferrite substrate. A magnetic biasing field of variable magnitude is generated and applied through the ferrite substrate transversely across the slot line resonant cavities. The magnetic field operates to change the electrical length of the resonant cavities due to the fact that the magnetic permeability of the ferrite material changes with the applied field.

REFERENCES:
patent: 3539950 (1970-11-01), Freibergs
patent: 3602845 (1971-08-01), Agrios et al.
patent: 3688225 (1972-08-01), Cohn
patent: 3766494 (1973-10-01), Anbe et al.
patent: 4020429 (1977-04-01), Bickley
patent: 4027253 (1977-05-01), Chiron et al.
patent: 4169252 (1979-09-01), Muskiewicz
IEEE Transactions on Microwave Theory and Techniques, vol. MTT-17, No. 12, ec. 1969, "Slot Line Characteristics", Elio A. Mariani, et al., pp. 1091-1096.
IEEE Transactions on Microwave Theory and Techniques, vol. MTT-18, No. 12, Dec., 1970, "Slot-Line Filters and Couplers", Elio A. Mariani, et al., pp. 1089-1095.
Application of Slot Line to Miniature Ferrite Devices, May, 1969, discloses concept of slot line on a dielectric substrate.

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