Efficient CAD Model to Analysis of High Tc Superconducting Circular Microstrip Antenna on Anisotropic Substrates

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 the superconducting circular patch are also presented.

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

“…The goal of the second proposition is to improve the calculation of the resonant frequency by using the formula of the effective dielectric constant (effective permittivity), given by [6]…”

“…In order to account the anisotropy in the substrate by using electromagnetic knowledge, thickness h and relative permittivities ε x and ε z of the uniaxially anisotropic substrate are replaced by equivalent parameters using the following equations [6] ε req = ε z (6)…”

“…The resonant frequency of HTSMAs will vary with temperature due to changes in the surface reactance of the HTS thin films used to fabricate the microstrip patches. This change in resonant frequency can be determined using a modified cavity model of the microstrip patch antenna, by considering the effective dielectric constant [6].…”

“…where t is the thickness of HTS film, and ε eff is the permittivity equivalent. For a homogeneous superconductor, the temperature dependence of the magnetic penetration depth λ f can be modeled by the Gorter-Casimir two-fluid model as [6]…”

Resonant Characteristics of Circular HTC Superconducting Printed Antenna Covered With a Dielectric Layer

“…Partly due to their very low surface impedance, smaller losses, smaller dispersion and smaller propagation time have been reported showing that HTS patches are good candidates for current rapid communications. Furthermore, greater performances have been obtained using anisotropic dielectrics or substrate/superstrate configurations for HTS rectangular [10][11][12] and circular patch [13][14][15].…”