Abstract
The effect of a protecting dielectric superstrate on the resonance of a high Tc superconducting microstrip patch is investigated. The analysis approach is based on the spectral-domain method of moments in conjunction with the complex resistive boundary condition. The complex surface impedance of the superconducting thin film is determined using London’s equation and the two-fluid model of Gorter and Casimir. Numerical results show that the resonant frequency of the high Tc superconducting rectangular patch decreases monotonically with increasing superstrate thickness, the decrease being greater for high permittivity loading.
Highlights
Microstrip devices have been used widely as microwave circuit elements such as transmission lines, filters, resonators, etc
We study the influence of the superstrate thickness on the resonant frequency
A rigorous full-wave analysis has been applied to investigate the effect of dielectric protecting superstrate on the resonant frequency of a high Tc superconducting rectangular microstrip patch
Summary
Microstrip devices have been used widely as microwave circuit elements such as transmission lines, filters, resonators, etc. For high frequency operation in the millimetre-wave range, the thin substrate approximation of low frequencies is not valid and a rigorous analysis is necessary for greater accuracy in the design of the element. The benefits of using high-temperature superconductors in microwave and millimetre-wave microstrip array feed networks can be quite substantial owing to the reduced losses, which translates to an increase in the design of the antenna [10]. This paper presents a rigorous full-wave analysis of high Tc superconducting rectangular microstrip patch in a substrate-superstrate configuration. Numerical results for the effect of the dielectric protecting superstrate on the resonant frequency of the high Tc superconducting rectangular microstrip antenna are given. ADVANCED ELECTROMAGNETICS SYMPOSIUM, AES 2013, 19 – 22 MARCH 2013, SHARJAH – UNITED ARAB EMIRATES
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