Patent ID: 8482451
Filing Date: 2013-07-09
Classification: G01S,G01V,G06K,H01Q

Abstract:
1. A resonant radar reflector assembly comprising first and second reflector members, the first and second reflector members each being configured to resonate at a respective resonant frequency when irradiated by radio frequency (RF) radiation of a corresponding frequency, wherein the first member has a portion responsive to an electric field applied parallel to an electric polarisation axis of the first member, the second member having a corresponding portion responsive to an electric field applied parallel to a corresponding electric polarisation axis of the second member, the first member also having a portion responsive to a magnetic field applied parallel to a magnetic polarisation axis of the first member, the second member having a corresponding portion responsive to a magnetic field applied parallel to a corresponding magnetic polarisation axis of the second member, the first and second members being arranged such that at least one electric or magnetic polarisation axis of the first member is substantially not parallel to the corresponding electric or magnetic polarisation axis of the second member; and wherein a resonant frequency of the first member is different to a resonant frequency of the second member, the members being arranged to reflect electromagnetic radiation of different respective prescribed frequencies.