Microwave notch filter using pin diode shunted YIG resonators

Details Microwave notch filter using pin diode shunted YIG resonators Microwave notch filter using pin diode shunted YIG resonators

1989-06-02

1990-10-23

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333176, 3332192, H01P 120, H01P 1218

Patent

active

049655396

ABSTRACT:
Disclosed is a microwave notch filter which includes a plurality of serially connected YIG tuned resonators, each YIG resonator including a coupling wire and a PIN diode connected in parallel with the coupling wire. A first interconnect interconnects one end of the plurality of serially connected YIG resonators to an RF signal source, and a second inter-connect interconnects another end of the plurality of serially connected YIG band reject filters to a load. An inductor connects one of the interconnects to a circuit ground potential, and an inductor means connects the other interconnect to a DC voltage source, whereby the PIN diodes in the YIG resonators can be forward-biased or reverse-biased by an applied DC voltage. The DC voltage source selectively provides a positive DC voltage and a negative DC voltage which effectively controls the functioning of said YIG band reject filters. The PIN diodes are serially connected with like polarities whereby application of a negative voltage reverse-biases said diodes and application of a positive voltage causes said diodes to short-circuit said YIG resonators.

REFERENCES:
patent: 3973204 (1976-08-01), Keiter
patent: 4420731 (1983-12-01), Schiebold et al.
patent: 4554516 (1985-11-01), Basawapatna
patent: 4633205 (1986-12-01), Jones

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