Magnetostatic wave S/N enhancer and receiving apparatus of FM or

Details Magnetostatic wave S/N enhancer and receiving apparatus of FM or Magnetostatic wave S/N enhancer and receiving apparatus of FM or

1991-09-13

1994-04-26

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455306, 455312, 455214, 333148, 333201, H04B 126

Patent

active

053075161

ABSTRACT:
A magnetostatic wave (MSW) signal-to-noise (S/N) enhancer includes a divider for dividing an input signal into a first and a second path signals, first and second microwave-MSW transducers for transducing the first and second path signals into the first and second path transduced signals, and a combiner for combining the first and second path transduced signals in opposite phase to each other. The first path signal contains a desired signal which is higher than a first saturation level and a noise component which is lower than the first path threshold power level. The first microwave-MSW transducer outputs the noise in linear operation and the desired signal in saturation operation. All the component signals of the second path signal including noise are lower than the second path threshold power level and are output in a linear operation by the second microwave-MSW transducer.

REFERENCES:
patent: 3875537 (1975-04-01), Dolby
patent: 4127819 (1978-11-01), Keane
patent: 4283692 (1981-08-01), Adam
patent: 4780667 (1988-10-01), Reese, Jr. et al.
patent: 4814718 (1989-03-01), Agrintaru et al.
"Magnetostatic Wave and Magnetostatic Wave-Optic Filler Technology" Adam et al; Microwave Journal Nov. 1990; pp. 105-112 and 115.
"Broadband Microwave Signal to Noise Enhancer"; Adam, J. D. IEEE Transactions, vol. MAG-16, No. 5, pp. 1168-1170 (1980).
"A Slot Line MSW Signal-to-Noise Enhancer"; Adam, J. D. IEEE Transactions, vol. Mag-21, No. 5, pp. 1974-1976 (1985).
"Microwave Magnetostatic Delay Devices Based on Epitaxial Yttrium Iron Garnet", Adam et al.; IEEE, vol. 64, No. 5; May 1976.
"A Magnetostatic Wave Signal to Noise Enhancer" Adam et al, Applied Physics Letters, vol. 36; Mar. 15, 1980,

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