Double band frequency converting system

Details Double band frequency converting system Double band frequency converting system

1991-07-29

1993-02-02

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307271, 4551901, 455313, H04B 126, H04B 1500

Patent

active

051840847

ABSTRACT:
A double band frequency converter for converting high frequency signals of the microwave radio band to a lower band for a microwave radio band frequency receiver having a wave guide and a low noise amplifier for low-noise amplifying the high frequency signals at the higher microwave frequency band supplied through the wave guide. The double band frequency converter comprises a first frequency converter for converting frequency of the output of the low-noise amplifier, a second frequency converter for frequency-converting the output of the first frequency converter, and an IF amplifier for selectively amplifying the outputs of the first frequency converter or the second frequency converter and an intermediate frequency selection circuit for selecting an output of the first frequency converter or the second frequency converter and supplying it to the IF amplifier. As a result, the second frequency converter operates at the frequency band lower than that of the first frequency converter, facilitating designing and manufacturing works to reduce production cost.

REFERENCES:
patent: 3961264 (1976-06-01), Hekimian et al.
patent: 4132952 (1979-01-01), Honga et al.
patent: 4385402 (1983-05-01), Barrs
patent: 4509198 (1985-04-01), Nagatomi

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