S/N enhancer

Details S/N enhancer S/N enhancer

2005-08-30

2005-08-30

Wambley, Patrick (Department: 2819)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C342S375000

Reexamination Certificate

active

06937112

ABSTRACT:
A S/N enhancer using the magnetostatic wave signal. The S/N enhancer comprises a balun coupler for dividing an input signal into a first and second signals having the same power, the second signal having the phase difference of 180 degree with respect to the first signal; a saturation magnetostatic wave filter for receiving the first signal output from the balun coupler, converting that into a magnetostatic wave signal, and oppositely converting the magnetostatic wave signal, wherein the power of the magnetostatic wave signal is saturated if the first signal has the power of equal to and more than that of a noise signal; a delay line having the linearity to transmit the second signal output from the balun coupler; and a power synthesizer for synthesizing the respective signals output from the saturation magnetostatic wave filter and the delay line.

REFERENCES:
patent: 4283692 (1981-08-01), Adam
patent: 4605911 (1986-08-01), Jin
patent: 4675682 (1987-06-01), Adam et al.
patent: 5923228 (1999-07-01), Okada et al.
patent: 670631 (1995-09-01), None
patent: 724330 (1996-07-01), None
patent: 2303740 (1993-02-01), None
A Reflection Type of MSW Signal-To-Noise Enhancer in the 400-MHz Band by T. Kuki et al., IEEE, 1995.
DBS Receiver with noise-reduction function using an MSW signal-to-noise enhancer by T. Nomoto et al., IEEE, 1993.
A signal-to-noise enhancer using two MSSW filters and its application to noise reduction in DBS reception by T. Nomoto et al., IEEE, 1993.

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