Tracking filter for use in hand held radar device

Details Tracking filter for use in hand held radar device Tracking filter for use in hand held radar device

1979-11-16

1981-12-22

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

328133, G01S 1332

Patent

active

043073980

ABSTRACT:
A tracking filter for tracking the frequency component of highest intensity of an input signal is disclosed in a hand held FM radar device. The tracking filter includes circuitry for providing a high pass signal, a bandpass signal and a low pass signal, all of which are representative of the frequency components of the input signal. An error signal generating circuit utilizes the high pass and low pass signals to control the characteristic frequency associated with the high pass, low pass and bandpass signals. The radar device further includes circuitry for displaying a distance output on an LED display and circuitry for providing an audio signal indicative of target distance.

REFERENCES:
patent: 3461452 (1969-08-01), Welter
patent: 3588899 (1971-06-01), Strauch
patent: 3638037 (1972-01-01), McMurtrie
patent: 3735402 (1973-05-01), Mosher
patent: 4072947 (1978-02-01), Johnson

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