Analysis of High-Tc Superconducting Microstrip Antenna Using Modified Spectral Domain Moment Method

Nozomu ISHII  Toru FUKASAWA  Kiyohiko ITOH  

IEICE TRANSACTIONS on Electronics   Vol.E77-C   No.8   pp.1242-1248
Publication Date: 1994/08/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Superconducting Devices)
Category: HTS
high-Tc superconducting,  microstrip antenna,  spectral domain moment method,  three-fluid model,  radiation efficiency,  input impedance,  

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In this paper, we analyze high-Tc superconducting (HTS) microstrip antenna (MSA) using modified spectral domain moment method. Although it is assumed that the patch and the ground plane of the MSA are perfect electric conductors (PECs) in the conventional spectral domain method, we modify this method to compute the conduction loss of the HTS-MSA. In our analysis, the effect of the HTS film is introduced by the surface impedance which we can estimate by using the three fluid model and experimental results. This paper presents numerical results about the HTS-MSA, for example, the relations between the thickness of the substrate and the radiation efficiency, the temperature and the resonant frequency, and so forth. And we discuss the effective power range where the performance of the HTS-MSA is superior to that of the Cu-MSA.