S/N enhancer

Details S/N enhancer S/N enhancer

2005-02-01

2005-02-01

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S201000

Reexamination Certificate

active

06850132

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 said 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 linear magnetostatic wave filter for receiving the second signal from said balun coupler, converting that into a magnetostatic wave signal, and oppositely converting the magnetostatic wave signal, wherein the received second signal is converted into the magnetostatic wave signal having an energy linear to the power of the input signal; and a power synthesizer for synthesizing the respective signals output from said saturation magnetostatic wave filter and said linear magnetostatic wave filter.

REFERENCES:
patent: 5523725 (1996-06-01), Ishikawa et al.
patent: 5923228 (1999-07-01), Okada et al.
patent: 7-7445 (1995-10-01), None
A Reflection Type of MSW Signal-To-Noise Enhancer in the 400-MHz Band by T. Kuki et al. 1995.
DBS Receiver with noise-reduction function using an MSW signal-to-noise enhancer by T. Nomoto et al. 1993.
A signal-to-noise enchancer using two MSSW filters and its application to noise reduction in DBS reception by T. Nomoto et al. 1993.

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