Frequency shift rate detector

Details Frequency shift rate detector Frequency shift rate detector

1962-02-28

1978-09-12

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

324162, G01S 1100

Patent

active

041141563

ABSTRACT:
2. A doppler shift rate detector system comprising: a first mixer; input ns for simultaneously applying a carrier signal and a doppler shifted sideband signal to said first mixer; first and second intermediate frequency amplifiers coupled to said first mixer; a mixer and an intermediate frequency amplifier stage coupled to said first and second intermediate frequency amplifiers; a mixer and oscillator stage coupled to said mixer and intermediate frequency amplifier stage; a frequency multiplier coupled to said mixer and oscillator stage; a second mixer coupled to said frequency multiplier; a delay line having an input coupled to said frequency multiplier and an output coupled to said second mixer, a narrow-band active filter coupled to said second mixer; an indicating means coupled to said filter; a low frequency switch coupled to said filter; a R. F. switch coupled to said first and second intermediate amplifiers; a sweep generator coupled to said R. F. switch and to said low frequency switch; and a variable frequency oscillator coupled between said sweep generator and said first mixer.

REFERENCES:
patent: 2896162 (1959-07-01), Berger et al.
patent: 3032715 (1962-05-01), Frye
patent: 3089029 (1963-05-01), Brinker
patent: 3453625 (1969-07-01), Zakheim et al.

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