Method and means for providing frequency agile operation of MTI

Details Method and means for providing frequency agile operation of MTI Method and means for providing frequency agile operation of MTI

1982-04-28

1985-01-22

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 172R, G01S 1352, G01S 1324

Patent

active

044955014

ABSTRACT:
The obtaining of simultaneous pulse-to-pulse transmitter carrier frequency agility and compatible moving target indicator (MTI) operation in conventional surveillance radars is achieved by the use of pairs of frequencies with a controlled relationship between the frequencies of each pair. A set of four pulses with different frequencies is sequentially transmitted and form two pairs of pulses. The difference between the frequencies of one pair of pulses is made equal to the difference between the frequencies of the second pair of pulses. MTI operation is obtained by differencing the pairs. Pulses having any three frequencies may be selected in any sequence before a constraint is imposed. The frequency of the fourth pulse is then determined by the frequencies of the first three pulses.

REFERENCES:
patent: 3403394 (1968-09-01), Rouault
patent: 4023169 (1977-05-01), Kolp et al.
patent: 4038659 (1977-07-01), Hamer et al.
patent: 4071844 (1978-01-01), Hopwood
patent: 4153899 (1979-05-01), Taylor, Jr.
patent: 4155088 (1979-05-01), Taylor et al.
patent: 4206463 (1980-06-01), Glasgow
patent: 4361840 (1982-11-01), Hauptmann
patent: 4385298 (1983-05-01), Josefsson et al.

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