Computer-Aided Design of Superconducting Equilateral Triangular Patch on Anisotropic Substrates

Abstract

The effects of both anisotropy in the substrates and the superconducting films on the resonant frequencies and radiation patterns of an equilateral triangular patch are investigated theoretically. Our proposed method is based on the modified cavity model in conjunction with the electromagnetic knowledge. The validity of the proposed method is tested by comparing the computed results of the resonant characteristics with experimental data. Results show effects of the superconducting patch thickness as well as the anisotropy in the substrate on the resonant frequency and the radiation pattern of the triangular patch. The effects of the antenna parameters on resonant frequencies and radiation patterns are also presented and discussed. At higher substrate thicknesses, numerical results indicate that the radiation pattern is drastically changed. The resonant frequency, on the other hand, decreases with high equivalent permittivity of the anisotropic substrate. The proposed method is very fast, simple, and compatible well with CAD.

Resonant Frequency of Circular Sectorial Microstrip Antenna Printed On Double-Layered Anisotropic Substrates

“…For the case of uniaxially anisotropic substrate, by using the electromagnetics knowledge, the thicknesses ( i h ) and the relative permittivities ( i x  , i z  ) of each anisotropic substrate are replaced by equivalent parameters using the following equations [11] 2…”

“…To deal with the disabilities mentioned, several techniques have been presented in the literature to boost the characteristics of microstrip antennas, such as adding a parasitic band around the radiant element [1], Making a slot in the ground plane [8], increasing the thickness of the substrate and using stacked configurations [1,9]. So, one method of designing high-performance antennas is to use antenna printed on anisotropic substrates [10][11][12]. The anisotropic substrates provide docility, precise design and an additional degree of control over the features of the practical design of printed circuits [13][14][15][16][17][18].…”

“…The anisotropic substrates provide docility, precise design and an additional degree of control over the features of the practical design of printed circuits [13][14][15][16][17][18]. Consequently, several researchers have been devoted to the characterization of the different geometries of the microstrip antennas printed on anisotropic substrates [11,13,16]. In particular, a circular microstrip resonator can be used both as a separate antenna and as a component of oscillators and filters in multilayer microwave and millimeter wave integrated circuits (MWIC) [19].…”