초록 ▼

An apparatus and method for determining the angles-of-arrival and the polarization states of incoming RF signals of unknown polarization using three or more RF sensing antenna elements of differing yet known orientations of polarization. The apparatus includes an array of broad gain, substantially i

An apparatus and method for determining the angles-of-arrival and the polarization states of incoming RF signals of unknown polarization using three or more RF sensing antenna elements of differing yet known orientations of polarization. The apparatus includes an array of broad gain, substantially identical, RF sensing antenna elements of differing yet known orientations of polarization, an antenna element selection network, RF receiver channels, processing means for determining uncorrected phase differences from received RF signal phases for pairs of antennas, processing means for determining received signal powers, processing means for determining from RF signal powers corrections to the phase difference errors caused by polarization diversity between pairs of antennas, processing means for correcting uncorrected phase differences with determined phase difference corrections, processing means for determining incoming RF signal frequencies, processing means for determining ambiguous and unambiguous angles-of-arrival of incoming RF signals and processing means for determining the polarization states of incoming RF signals.

대표청구항 ▼

[ What we claim is:] [1.] An apparatus for determining angles-of-arrival and polarization states of a plurality of incoming electromagnetic waves comprising:(a) an antenna element selection network for electrically and switchably conducting said plurality of incoming electromagnetic waves as voltage

[ What we claim is:] [1.] An apparatus for determining angles-of-arrival and polarization states of a plurality of incoming electromagnetic waves comprising:(a) an antenna element selection network for electrically and switchably conducting said plurality of incoming electromagnetic waves as voltages to a receiver comprising at least three channels for receiving said plurality of incoming electromagnetic waves as voltages; said antenna element selection network providing at least three output signals;(b) means for determining signal power of said voltages of said plurality of incoming electromagnetic waves as produced by said receiver;(c) means for determining frequencies of said plurality of incoming electromagnetic waves;(d) a plurality of differencing junctions for determining phase differences of said plurality of incoming electromagnetic waves as produced by said receiver;(e) processing means for determining corrections to said phase differences of said plurality of incoming electromagnetic waves from said signal power of said voltages;(f) at least one summing junction for correcting said phase differences with said corrections; and(g) processing means for resolving angular ambiguities with said frequencies of said plurality of incoming electromagnetic waves and the corrected phase differences reby said angles-of-arrival and polarization of incoming electromagnetic waves are determined.