Patent ID: 6421004
Filing Date: 2002-07-16
Classification: G01R

Abstract:
A method of testing an antenna comprising the steps of:(a) emitting a test signal along a plurality of spaced apart signal source directions having respectively different orthogonal principle plane parameters relative to the boresight of said antenna, so that said test signal is incident upon said antenna from said plurality of different directions relative to the boresight axis of said antenna; (b) for each of the plurality of spaced apart signal source directions of step (a), receiving and demodulating signals received by said antenna; (c) combining a replica of said test signal with signals received and demodulated in step (b) in a manner that extracts energy in said test signal but excludes energy in any other signals that may be incident upon said antenna; and (d) processing test signal energy extracted in step (c) to derive a measure of a characteristic of said antenna.