Spectral Domain Analysis of Resonant Characteristics of High Tc Superconducting Rectangular Microstrip Patch Printed on Isotropic or Uniaxial Anisotropic Substrates

Abstract

In this paper, radiation characteristics of the perfectly superconducting, or an imperfectly conducting rectangular microstrip, which is printed on isotropic or uniaxial anisotropic substrate are investigated using a Fourier transforms domain in conjunction with the stationary phase method. The effects of uniaxial anisotropy on the resonant frequency, half-power bandwidth, and radiation patterns are investigated as the function of anisotropy ratio values of substrate materials. It is found that the resonant frequency and the half-power bandwidth are affected significantly by the superconductivity property of the patch. Further results show that a thin superconductor patch has a significant effect on the radiation pattern. Results are compared with previously published data and are found to be in good agreement.

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

“…There are many techniques [10][11][12] to enhance the bandwidth of conventional microstrip antennas. Bandwidth of antenna can be increased by designing the antenna with dielectric cover [13], where structures with substrate-superstrate are generally employed to improve the characteristics of the resonator, especially those of the antenna [14].…”

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

“…Isotropic substrates may as well exhibit anisotropy at high frequencies [18]. In earlier studies, we demonstrate that the optical properties of anisotropic substrate can dynamically exhibit wider bandwidth characteristic with several resonant frequencies [15][16][17][18][19]. Therefore, its precise description, including the effect of anisotropy on the substrate, is important for computer-aided design of microstrip antennas.…”

“…As compared to simpler coupled designs, slot cut in MSAs is relatively complex in design [7]. Substrate materials useful in Microwave Integrated Circuits (MICs) exhibit a natural or artificial dielectric anisotropy due to their manufacturing process [17]. Isotropic substrates may as well exhibit anisotropy at high frequencies [18].…”

“…Approximate techniques are usually developed for structures of a simple geometry, and furthermore, because they make the problem easy to understand by using certain assumptions, they can be relatively reliable and accurate under relevant conditions [16]. The spectral domain approach, full-wave analysis methods, and also commercially available simulation software can be used for the analysis of characteristics of patch antennas in multilayer substrates and for various structures and complex geometry [17][18][19]. All of these techniques provide reasonably accurate results.…”

Design and Analysis of a Microstrip Antenna Based on Superconducting Material for Millimeter Wave Applications

“…Advantages of using the superconducting materials at high frequencies are: very small losses which means low attenuation and low noise, smaller devices due to the lower losses, which leads to larger integration density, and the propagation time can be greatly reduced because of the smaller size and the shorter interconnects [5].…”