Radar RF generator including a stable local oscillator and an ex

Details Radar RF generator including a stable local oscillator and an ex Radar RF generator including a stable local oscillator and an ex

1973-12-26

1976-05-04

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

328 63, G01S 742, H03K 117

Patent

active

039551989

ABSTRACT:
The specification discloses a RF generator for use in a radar system. The generator includes an oscillator having a crystal for generating a predetermined VHF signal. A multiplier multiplies the VHF signal to a desired RF signal. Amplifying circuitry amplifies the RF signal and applies a signal to a first isolator. A filter is connected to the output of the first isolator and includes plural cavaties for filtering all but a selected narrow bandwidth signal from the RF signal. A power divider divides the narrow bandwidth signal to provide a stable local oscillator signal and an exciter signal. A second isolator is connected to receive the exciter signal and a high pass filter is connected to the output of the isolator. A coherent oscillator generates a stable coherent oscillator signal and a transmit switch is provided to gate the coherent oscillator signal in response to a radar timing signal. A mixer mixes the gated coherent oscillator signal with the filtered exciter signal. A bandpass filter passes a selected one of the upper and lower side bands of the output from the mixer. An exciter amplifier is connected to amplify the output of the bandpass filter and to apply the signal through a third isolator to the radar system.

REFERENCES:
patent: 2802105 (1957-08-01), Odden
patent: 2935609 (1960-05-01), Rabin et al.
patent: 2948879 (1960-08-01), Padberg, Jr. et al.
patent: 3263228 (1966-07-01), Abrahams et al.
patent: 3354457 (1967-11-01), Pfab et al.
patent: 3427615 (1969-02-01), Hubka
patent: 3774206 (1973-11-01), Rauch

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