Tracking filter system for use with a FM/CW radar

Details Tracking filter system for use with a FM/CW radar Tracking filter system for use with a FM/CW radar

1981-04-28

1984-01-31

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

328167, 343 14, G01S 1332

Patent

active

044293097

ABSTRACT:
A tracking filter system including a phase locked loop and a tracking filter is receptive of an input signal of frequency A and undesired frequency X from a signal source such as a frequency modulated/continuous wave radar range measuring system. The phase locked loop circuit receives the input signal and produces a control signal corresponding to a frequency intermediate frequencies A and X. The tracking filter is set by the control signal to pass frequencies above or below the intermediate frequency and thus to pass frequency A and to reject frequency X.

REFERENCES:
patent: 3683279 (1972-08-01), Weinberg et al.
patent: 3787774 (1974-01-01), Tietze et al.
patent: 4027264 (1977-05-01), Gutleber
patent: 4136314 (1979-01-01), Blackmer et al.
patent: 4210023 (1980-07-01), Sakamoto et al.
patent: 4234882 (1980-11-01), Thompson
patent: 4321602 (1982-03-01), Kipp

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