U‐patch antenna loaded by complex substrates for multifrequency operation

Abstract

In this paper, the analysis of patch antennas with U-shaped\ud metalization loaded by bianisotropic media is deeloped. A theoretical\ud study is performed to obtain transmission-line equations for bianisotropic\ud materials, and then a method-of-lines (MoL) procedure is applied to\ud obtain the radiatie characteristics. Presented results assure, for particular\ud patch dimensions and feed application geometry, a multifrequency\ud operation in the microwae range, een for isotropic substrates. The\ud application of bianisotropic materials gies better performances for bandwidth\ud and input impedance at the central frequency, but degrades other\ud frequency operation performances

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

“…Note that optimized tensors and collapse into and elements of [15] when standard MoL can be applied [i.e., for media satisfying condition (8)], avoiding to use shifting operators if not strictly necessary. Moreover, (13) has the property of applying shift tensors for a maximum of twice on constitutive tensors, in parallel with central difference operators, avoiding, in this way, to worse the method precision in presence of transverse inhomogeneities.…”

“…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.…”