Design and Analysis of Multifunctional Metasurface for Linear and Circular Polarized Incident Wave

Abstract

A passive multifunctional metasurface design has been proposed in this work for both linear and circular polarized incidences, between a frequency range of 4-7 GHz. The proposed unit cell structure comprises of concentric split pentagonal rings, loaded with two lumped capacitors on the top layer, having single dielectric layer. The main functionalities include polarization selective absorption (4.31-4.36 GHz) and reflective cross-polarization conversion (5.79-6.02 GHz) for linear polarized incidences. Moreover, polarization handedness maintaining reflection (4.57-5.45 GHz) and polarization selective absorption (6.12-6.26 GHz) for circular polarized incidences has been achieved. A sample prototype of 10 X 10-unit cells (2lambda_0 X 2lambda_0), was fabricated and the experimental results were verified with the simulated ones. Since the proposed design has such diversified functionalities for both linear and circular polarized incidences, it can find probable applications in polarimetric imaging techniques, polarization modulation devices, polarization sensors etc.