Communications: directive radio wave systems and devices (e.g. – With particular circuit – With polarization
Patent
1996-01-23
1998-03-24
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
With polarization
342153, 342194, G01S 728
Patent
active
057317836
ABSTRACT:
This invention relates to a method and apparatus by which a coarse estimate of radar signal polarisation can be obtained. An array comprises at least three differently directed detectors. The polarisation is estimated by measuring an amplitude relationship, such as a ratio of amplitudes, for two adjacent detectors and for two non-adjacent detectors. This provides sufficient information to obtain a coarse estimate of the polarisation state, obtainable by using the value of the amplitude relationship for the two adjacent detectors together with a look-up table to estimate values of the amplitude relationship for the two non-adjacent detectors for different polarisation states, and then comparing the measured and estimated values for this amplitude relationship.
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"Two Dimensional Angle and Polarization Estimation With a Simple Dipole Array," R. T. Compton, Jr., Antennas and Propagation Society Symposium, vol. 1, 1991, pp. 352-355.
Racal Radar Defence Systems Limited
Sotomayor John B.
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