Effects of Superstrate Layer on the Resonant Characteristics of Superconducting Rectangular Microstrip Patch Antenna

Abstract

Abstract-The resonant characteristics of superconducting rectangular microstrip patch antenna with a superstrate layer are investigated using a full-wave spectral analysis in conjunction with the complex resistive boundary condition. The complex surface impedance of superconducting patch is determined using London's equation and the two-fluid model of Gorter and Casimir. Numerical results using the full-wave analysis presented here are in excellent agreement with theoretical and experimental results available in the open literature. Numerical results show that the effect of the superstrate layer on the resonant frequency and half-power bandwidth of the superconducting rectangular patch is stronger than that of the structure without superstrate layer as both the thickness and permittivity of the superstrate increase. Finally, numerical results concerning the effects of the parameters of superstrate-substrate and superconducting patch on the antenna performance are also presented and discussed.

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

“…These behaviors agree very well with those reported elsewhere in [7]. Note that the abrupt change in the resonant frequency at temperatures near Tc can be attributed to a modification of the magnetic penetration depth of the YBCO [23]. It also observed that the resonant frequencies obtained when the superconducting patch is printed on PTFE are higher than those obtained when the superconducting patch is printed on the Boron nitride or Quartz because the effective relative permittivity of the PTFE is lower than the one of both anisotropic materials Boron nitride and Quartz.…”

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

“…where T and U in Equations (11) and (12) are respectively the Chebyshev polynomials of the first and second kinds.…”

“…Consider the evaluation of the VHT of Equations (11) and (12). The basis functions given in Equations (13) and (14) are then Hankel transformed to obtainΨ np andΦ nq , whose expressions are given by [14].…”

“…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].…”