Resonant frequency of a rectangular patch antenna using asymptotic basis functions

Abstract

Purpose -The purpose of this paper is to illustrate three types of basis functions and their asymptotic forms defined over the patch to model the unknown currents. Design/methodology/approach -A rigorous calculation of a microstrip structure that contains isotropic and anisotropic substrates via Galerkin's method is presented. The dyadic Green's functions of the problem are efficiently determined by the (TM, TE) representation. Findings -The resonant frequency of a rectangular microstrip patch antenna using these different asymptotic basis functions is investigated. The effect of uniaxial anisotropy in the resonant frequency is presented for these asymptotic currents. Originality/value -Comparisons are made, and show that the utilization of the asymptotic basis function provides a significant improvement in the computation time over the exact form in the evaluation of the resonant frequency of a microstrip patch antenna. Convergent solutions are in good agreement with the exact sinusoid basis function without edge condition and with those obtained from literature.

Full-wave Analysis of Rectangular Microstrip Antenna Printed on Electric-Magnetic Uniaxial Anisotropic Substrates

“…The resonant frequency and half-power bandwidth of the patch antenna against the substrate thickness are shown in Figures 2(a) and (b), where isotropic   This influence tends to be neglected for lower substrate thickness. These behaviors agree very well with those reported for a various shapes patch antenna, by [6][7][8][9][10][11]. (Figure 4(b)), it is increased due to the negative uniaxial anisotropy, and decreased due to the positive uniaxial anisotropy.…”

“…However, there has been very little research into using anisotropic materials as substrates [6][7][8][9][10][11]. By introducing a variety of anisotropic dielectrics into multilayered microstrip antennas, some of those unwanted characteristics of conventional antenna could potentially be eliminated or improved [4].…”

“…The method of moments (MoM) has been proven to be one of the most powerful CAD tools for solving this class of problems. By now, a number of microstrip antennas with anisotropic substrate have been investigated using the MoM based spectral domain analysis method [6][7][8].…”

Hankel transform domain analysis of covered circular microstrip patch printed on an anisotropic dielectric layer

“…Owing to the inherent narrow bandwidth of this type of antenna around their operating resonant frequencies, it is important to develop accurate algorithms for the computation of those resonant frequencies [4][5][6]. The addition of a superstrate layer over microstrip patch antenna has been reported to allow for the enhancement of the antenna gain and radiation efficiency, effectiveness and polarization of the antenna [1,7,8].…”

Spectral-domain analysis of a resistive patch antenna with uniaxial substrate

“…In general these structures are poor radiators, but by proper design the radiation performance can be improved and these structures can be used as antenna elements [1][2][3][4][5][6][7][8][9][10]. In recent years microstrip patch antennas became one of the most popular antenna types for use in aerospace vehicles, telemetry and satellite communication.…”