Analysis of caustic region fields of a cassegrain system having PEMC reflectors embedded in homogeneous chiral medium

Abstract

Analysis of high frequency field expressions for the Cassegrain system having perfect electromagnetic conducting (PEMC) boundaries are studied. Both the reflectors of Cassegrain system are PEMC and are embedded in chiral medium. Two different cases have been analyzed depending upon the values of chirality parameter (kβ). In the first case, chiral medium supports positive phase velocity (PPV) for both the left circularly polarized (LCP) and right circularly polarized (RCP) modes. In the second case, chiral medium supporting PPV for one mode and negative phase velocity (NPV) for the other mode is taken into account. Mathematical recipe proposed by the Maslov is used to obtain the field expressions in the focal region because geometrical optics (GO) causes non-realistic singularity in this region. Field patterns of focal plane are given in the paper for different values of admittance (M) of the PEMC boundary and the chirality parameter (kβ).