Abstract
In this paper, an electromagnetic approach based on cavity model in conjunction with electromagnetic knowledge was developed. The cavity model combined with London’s equations and the Gorter-Casimir two-fluid model has been improved to investigate the resonant characteristics of high Tc superconducting circular microstrip patch in the case where the patch is printed on uniaxially anisotropic substrate materials. Merits of our extended model include low computational cost and mathematical simplify. The numerical simulation of this modeling shows excellent agreement with experimental results available in the literature. Finally, numerical results for the dielectric anisotropic substrates effects on the operating frequencies for the case of superconducting circular patch are also presented.
Highlights
The circular disc printed on a dielectric substrate backed by a perfectly conducting ground plane is used as an antenna as well as a resonator in microwave integrated circuits
This section describes improvements and simulations performed on the cavity model, for superconducting circular microstrip antenna printed on uniaxially anisotropic substrates
We study the effect of anisotropy on the substrate, on the resonant frequency of perfect conducting circular microstrip patch antenna
Summary
The circular disc printed on a dielectric substrate backed by a perfectly conducting ground plane is used as an antenna as well as a resonator in microwave integrated circuits. In a previously presented study [6,7,8], we have shown that circular microstrip antenna with the properly selected uniaxial anisotropic substrate is more advantageous the isotropic one by exhibiting wider bandwidth characteristic with different resonant frequencies. With the increasing complexity of geometry and material property, designing these antennas requires more and more dedicated and sophisticated computer-aided-design (CAD) tools to predict the characteristics These commercial design packages use computer-intensive numerical methods such as Finite Element Method (FEM), Method of Moment (MoM), Finite Difference Time Domain (FDTD) method, etc. Fewer researchers [14,15], have investigated the effect of the anisotropic substrate on the resonant characteristics of conventional conducting microstrip antennas. The main advantage of this approach lies in its mathematical simplicity and low computation cost which is faster than the numerical methods and commercially available softwares
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