Simultaneous Beam-Steering and Polarization Conversion Using a Varactor-Integrated Metasurface

We propose a varactor-integrated metasurface on printed circuit board (PCB) which is capable of beam steering and polarization conversion simultaneously at 2.45 GHz with 90 MHz 3 dB bandwidth. By applying proper biasing voltage on the varactors, different phases are added to the orthogonal components of the incident linear-polarized field to achieve linear (LP) to circular (CP) or cross-linear (CLP) polarization conversion and up to 45° beam steering. This design is a good candidate for wireless communication systems to reduce the effect of pattern nulls and polarization mismatch.