Low-profile twist reflector design using genetic algorithms

A novel low-profile twist reflector is genetically engineered For a linear polarized incident wave, a perpendicular linear polarized wave can be achieved upon reflection. Unlike the typical twist reflector, which requires at least a quarter-wavelength space between the top metal strip and main reflector, the proposed structure is built on a 0.08lambda thick substrate, still enhancing about 20% bandwidth. Finally, there is good agreement between the measured and the simulated results promising that the twist reflector can be used to alter the antenna polarization response.