Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1980-06-23
1982-04-06
Hubler, Malcolm F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343100PE, G01S 1302
Patent
active
043238980
ABSTRACT:
An apparatus and method for detecting the polarization of signals reflected from targets immersed in clutter. Signals reflected from targets illuminated with quasimonochromatic electromagnetic signals such as FMCW radar are received by antennas responsive to orthogonally polarized components of the reflected signals. These received orthogonal signal components are then modified such that one component is phase shifted with respect to the other signal components, and the amplitudes of the signal components are varied according to predetermined angles of polarization. The resulting signals are further analyzed in a processor which detects the polarization of the reflected signals by estimating the Stokes parameters for the reflected signal. The Stokes parameters may then be used to generate detection criteria that are compared to a predetermined threshold level.
REFERENCES:
patent: 3234547 (1966-02-01), Katzin
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patent: 3760274 (1973-09-01), Vogt
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"An Analog Polarization Follower for Measuring the Faraday Rotation of Satellite Signals", by Gottfried Vogt, The Radio & Electronic Engineer, Oct. 1964, pp. 269-278.
Barnes Richard M.
Bennett, Jr. Clarence L.
Vachula George M.
Hubler Malcolm F.
Ilardi Terry J.
Sperry Corporation
Terry Howard P.
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