Low profile meanderline polarizer

Abstract

In this paper, a theoretical analysis of low profile, dual layer meanderline polarizer is presented. Dual layer polarizer is analyzed using transmission line model and computing wave transmission matrix. The relative axial ratio bandwidth was achieved to be 13.6% with thickness of the polarizer 0.137λ at S-band. Behaviour of change in axial ratio and return loss with oblique incidence of plane wave in different planes is predicted and it is found that return loss remains better than 16 dB and axial ratio remains better than 3 dB up to 10° incidence angle in the desired band (2.5-2.7GHz). The results compared with 3D solver CST show good agreement.