Patent ID: 6891516
Filing Date: 2005-05-10
Classification: H01Q

Abstract:
1. An adaptive multifilar antenna comprising: a plurality of spaced filaments, at least a portion of the filaments being coupled together in a fixed phase relationship to form a group of filaments; a weighting circuit operable to apply variable phase adjustments to signals passed to and/or from the filaments, said weighting circuit being operable to apply a common variable phase adjustment to signals passed to and/or from the filaments of the group; detecting means operable to detect at least one electrical property of the adaptive multifilar antenna with respect to at least one of the frequency, polarization and/or direction of propagation of a signal to be received or transmitted by the adaptive multifilar antenna and impedance matching of the antenna; and control means, responsive to the detecting means, operable to control operation of the weighting circuit to adjust properties of the multifilar antenna to suit better a current signal to be received or transmitted.