Device for measuring the range of a moving target and the speed

Details Device for measuring the range of a moving target and the speed Device for measuring the range of a moving target and the speed

1977-12-19

1980-05-27

Buczinski, S. C.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 75, 343 175, G01S 944, G01S 902, G01S 923

Patent

active

042053145

ABSTRACT:
A radio range measuring apparatus having a controlled modulation slope in order to keep the beat frequency between the transmitted signal and the received signal constant. The apparatus also measures the speed at which a mobile target approaches or recedes by means of a generator of a fixed frequency which, after frequency division, maintains the duration between the start of two consecutive sawtooth modulation signals fixed. A particular spectral line of the beat signal is demodulated by this fixed frequency via a mixer whose output is filtered by a passband filter. The signal at the output of the filter has a frequency which is equal to the Doppler frequency, proportional to the speed.

REFERENCES:
patent: 2537593 (1951-01-01), Landon et al.
patent: 3605094 (1971-09-01), Peperone
patent: 3680092 (1972-07-01), Scott
patent: 3896436 (1975-07-01), Johnson
patent: 4008473 (1977-02-01), Hinachi et al.
patent: 4008475 (1977-02-01), Johnson
patent: 4079377 (1978-03-01), Heiden et al.

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