Polarization-converse tag design for clutter-isolation radio detection and ranging applications

Radio detection and ranging (RADAR) always suffers from clutters, which extremely constrains its maximum operation distance. To mitigate such intrinsic and common problem, a novel polarization-converse tag on targets is proposed and designed with an integration of a sharedaperture dual-linearly-polarized (DLP) antenna, a microstrip hybrid coupler, and two RF grounded (GND) stubs, which can directly transform polarizations of transmitting interrogation (e.g., vertical polarization) to converse-polarization backscatters (e.g., horizontal polarization) insulated from clutters. The proposed polarization-converse tag design is validated by the theoretical analysis as well as experimental results, which brings a prospect for RADAR applications.