Single oscillator FSK pulsed radar receiving transmitter

Details Single oscillator FSK pulsed radar receiving transmitter Single oscillator FSK pulsed radar receiving transmitter

1990-07-19

1991-07-30

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

For frequency modulation

342175, 342 98, 342100, G01S 1326

Patent

active

050363271

ABSTRACT:
An improved radar receiver transmitter uses a single oscillator frequency shift keyed system in which the oscillator shifts rapidly between a pulsed output frequency and a local frequency such that the system can transmit at one frequency and shift fast enough such that when the echo pulse is received, the transmitter is operating at the local frequency desired. The two signals are demodulated in a mixer to establish the desired intermediate frequency which then may be processed to produce the desired output. Extremely fast shifting is accomplished by a gallium arsenide oscillator in conjunction with a varactor diode which responds to a modulator pulse.

REFERENCES:
patent: 4313183 (1982-01-01), Saylors
patent: 4689623 (1987-08-01), Schwab et al.
patent: 4888595 (1989-12-01), Friedman
patent: 4899158 (1990-02-01), Saeki et al.

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