A Simple Wideband Angular Stable Linear-Circular and Linear-Cross Reflective Type Polarizer for Satellite Communication Applications

Abstract

A simple linear-cross and linear-circular reflective polarizer is presented in this work. For a 45° linearly polarized EM wave incidence, this design exhibits linear-circular conversion with Axial Ratio (AR) ≤ 3dB from 20.01-21.83 GHz (RCP at K-band) and 28.66-50.14 GHz (LCP at Ka-band and V-band), with 8.70%, and 54.52% Fractional Bandwidth (FBW) respectively. It also results in linear-cross conversion with 90% Polarization Conversion Ratio (PCR) bandwidth from 23.09-26.33 GHz (K-band with 13.11% FBW). Multiple surface plasmonic resonances are responsible for this dual-polarization conversion. Surface current patterns of the top FSS and ground plane are investigated to get physical insight. The PCR and AR performance are stable up to 40° for Transverse Electric (TE) and Transverse Magnetic (TM) cases. The design is compact with a structural periodicity of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$0.093 \lambda_{\mathrm{L}}\times 0.137 \lambda_{\mathrm{L}}$</tex> , and thickness of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$0.053 \lambda_{\mathrm{L}}$</tex> . Here, <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\lambda_{L}$</tex> corresponds to the lowest frequency's free-space wavelength of the operating range. The author firmly thinks that the miniaturized converter countervails Faraday's rotation experiences by Electromagnetic (EM) waves in satellite communication applications.