Minimizing harmonic distortion apparatus

Details Minimizing harmonic distortion apparatus Minimizing harmonic distortion apparatus

1980-06-13

1982-03-16

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 7A, G01S 1358

Patent

active

043203981

ABSTRACT:
An apparatus is provided to minimize harmonic distortion in a microwave circuit which is used with a velocity measuring system. The apparatus is particularly applicable where at least two Doppler signals are generated at substantially the same time from two different targets whose velocity is being measured. The apparatus includes a microwave circuit which transmits a microwave energy signal directed to each of the targets. The microwave circuit also receives the signals reflected by the targets and produces Doppler signals. A control circuit responds to the Doppler signals outputted by the microwave circuit by providing a control signal corresponding to the greatest in amplitude of the Doppler signals. The control signal is fed back to the microwave circuit to control the Doppler signals so that a predetermined amplitude thereof is not exceeded and, as a consequence, harmonics of the Doppler signals are not generated.

REFERENCES:
patent: 3618084 (1971-11-01), Balsiger et al.
patent: 4020490 (1977-04-01), Millard
patent: 4052722 (1977-10-01), Millard
patent: 4117483 (1978-09-01), Fujiki
patent: 4172256 (1979-10-01), Pacozzi

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