In practice, it was found that the choice of the substrate or superstrate material of printed antennas is of a great importance and plays a significant role in achieving the optimum resonant characteristics of the antenna; Uniaxial dielectrics have drawn more attention due to their availability in materials such as sapphire, boron nitride and Epsilam-10 ceramic-impregnated Tefon. Previous studies of anisotropic materials used in microwave devices indicate that the effects of anisotropy on the performance of such structures particularly in high frequencies cannot be ignored. Three very popular full wave methods that can be used to characterise microstrip patch antennas are: the finite element method, the finite difference time domain method, and the moment method. The last one also known as the full-wave method is arguably the most popular method for the analysis of microstrip antennas. In this work, resonant characteristics (the resonant frequency, the Half-power bandwidth) of an annular microstrip patch printed on uniaxially anisotropic substrate and covered with an anisotropic superstrate layer are studied using an electric field integral equation and the spectral domain Green’s function. In order to validate the present method, we have confronted our results with theoretical and experimental data from the literature and very Good agreements were obtained between our computed data and measurements, and the convergence of the method is proven.
Primary Language | English |
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Subjects | Engineering |
Journal Section | Articles |
Authors | |
Publication Date | November 24, 2019 |
Published in Issue | Year 2019Volume: 7 |