Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1981-04-15
1983-06-14
Wilbur, Maynard R.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 5NQ, 343 9R, G01S 1334, G01S 1358
Patent
active
043886221
ABSTRACT:
A double sideband linear frequency modulation technique for radar applications is disclosed for obtaining simultaneous range and doppler measurements. The method of obtaining measurements is useful in a variety of radar applications; however, the most promising area is in continuous wave radar systems. Linear Frequency Modulated (LFM) waveforms of both increasing and decreasing frequency are simultaneously transmitted. Upon reception, these sideband signals are combined coherently to give an output that is a function of the target's radial velocity. The received signals are also processed separately to obtain target ranging information.
REFERENCES:
patent: 2695995 (1954-11-01), Cauchois
patent: 4302758 (1981-11-01), Tomasi
M. I. Skolnik, "Introduction to Radar Systems", 1962, pp. 86-103, discloses lock diagrams of CW radar techniques, as for example FIGS. 3.11, 3.14, and 3.19; also, a CW ranging technique is discussed at p. 88 which uses both up and down chirp signals, however the sequential technique does not coherently combine the signals, resulting in a loss in detection capability.
Burk Robert C.
Bush Freddie M.
Gibson Robert P.
Lane Anthony T.
The United States of America as represented by the Secretary of
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