Means for developing a radar tracking error signal

Details Means for developing a radar tracking error signal Means for developing a radar tracking error signal

1975-02-18

1979-08-07

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 922

Patent

active

041639731

ABSTRACT:
A tracking radar error signal that is independent of pulse to pulse variations of amplitude of the received signal is derived by combining separately detected sum signal energy and difference signal energy in a manner that provides composite error signal pulses that are one-half sum signal energy and one-half sum plus difference signal energy. The pulse composition is realized by means of an RF switch that interrupts the difference signal during approximately one-half of each pulse period. The composite error signal is detected by an IF logarithmic detector and subsequently processed by two parallel box car generators. One box car generator is gated to process sum signal energy and the other is gated to process sum plus difference signal energy. The tracking error signal is obtained from a single pulse by feeding the outputs of the two box car generators to a differential amplifier and obtaining the difference voltage at its output.

REFERENCES:
patent: 3229287 (1966-01-01), Hovda
patent: 3579239 (1971-05-01), Purcell et al.

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