Patent ID: 7345625

Claim:
A method for compensating errors in transmitted circular polarization such that reflections from spherical objects tend to be cancelled, said method comprising: transmitting from an antenna an electromagnetic signal at a carrier frequency, which signal includes mutually orthogonal linear components nominally phased to generate circular polarization, but which may instead generate noncircular elliptical polarization, to thereby produce transmitted signals; receiving, by means of first and second linear antennas, first and second mutually orthogonal linear components of reflections of said transmitted signals, to thereby produce first and second received signals; procuring a set of correction factors to the first and second received signals, which correction factors are a function of (a) beam direction in the case of monostatic radar and (b) beam directions in the case of bistatic radar; processing said first and second received signals with said correction factors in such a fashion as to cause the received signal to appear as if substantially perfect circular polarization had been transmitted and received.