Radio receiving and retransmitting apparatus with frequency lock

Details Radio receiving and retransmitting apparatus with frequency lock Radio receiving and retransmitting apparatus with frequency lock

1978-07-05

1980-07-22

Safourek, Benedict V.

Telecommunications

Carrier wave repeater or relay system

With frequency conversion

455 22, H04B 7155

Patent

active

042142059

ABSTRACT:
In radar apparatus for actively enhancing and retransmitting a received radar signal, the incoming signal is mixed with the output of a first local oscillator, the resulting signal being supplied to a frequency lock loop which varies the frequency of the first local oscillator until the frequency of the resulting IF signal is equal to a first reference IF frequency. The first local oscillator output is mixed with the output of a second local oscillator, the frequency of which is varied until the frequency of the resulting second IF signal is equal to a second reference IF frequency. The output from the second local oscillator is retransmitted. The first and second reference IF frequencies are identical if the frequency to be retransmitted is the same as the incoming RF carrier frequency.

REFERENCES:
patent: 3675132 (1972-07-01), Hansen
patent: 3860870 (1975-01-01), Furuya
patent: 3940695 (1976-02-01), Sickles

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