Design of chiral planar integrated antennas with cover via the method of lines

Abstract

The analysis of patch antennas loaded by general inhomogeneous and lossy chiral media is presented in this paper, implementing ( ) a new method-of-lines MoL procedure, which considers inhomogeneous planar structures loaded by any bi-isotropic material. Presented results refer to the effect of a chiral co¨er on the resonance frequency of a simple squared-patch structure. Design charts are presented to simply analyze the separate effects of co¨er thickness and chirality.ABSTRACT: The detection, location, and sizing of immersed objects in a host medium are tasks of interest in many fields. One of the most suitable tools for the nonin¨asi¨e measurements of buried objects is the use of microwa¨es. We propose in this paper a microwa¨e method based on the knowledge of the reflection coefficient.

Extended method of line procedure for the analysis of microwave components with bianisotropic inhomogeneous media

“…In order to avoid this problem we introduce the super-vector and we rewrite (11) as (14) In the following, we will assume that, if the material is inhomogeneous along direction, we approximate the constitutive parameter variation as a cascade of several -homogeneous layers with different electromagnetic properties. In each homogeneous layer we can write and diagonalize (14) and, following [1], we obtain a simple diagonalized system for the rotated vector , where is the eigenvector matrix of . Differently from standard MoL, we get a first order differential equation, which admits exponential solutions.…”

“…In addition, we propose an Extended MoL (E-MoL) procedure, applicable to any linear material, including the ones not satisfying the previous condition, which collapses to the standard one when such a condition holds. The authors have already used this technique to study the electromagnetic properties of bianisotropic and chiral media applied to patch antennas [13], [14], but in these communications the attention is focused only on the component features and no details are given on the method. In this paper, instead, the authors for the first time present the entire algorithm and validate it through the comparison with numerical data obtained using FEM.…”