Genetically-engineered meanderline twist reflector

A meanderline polarization twist reflector designed through genetic optimization is presented. Modeled and measured reflection response of electric field components parallel and perpendicular to the meanderline axis are reported, with excellent agreement. Polarization conversion efficiency greater than 98% is demonstrated over 18% bandwidth at 12.9 GHz for a meanderline on substrate of thickness t ≪0.10λ
o
. Dual-band performance is revealed by considering insertion loss of co-polarized reflection for an incident electric field oriented 45° from the meanderline axis. Parameter-dependent sensitivity at the two resonant frequencies is reported, providing a means for independent control of the lower and upper frequency response.