High Temperature Superconducting Planar Circuit Structure for High Frequency Applications
Abstract
It is known that the surface resistivity and the depth of penetration of high Tc superconductor may be dependent on the current density or the surface magnetic field. If a printed transmission line such as a microstrip line is made of these materials, the current distribution in the cross section of the strip can affect the local resistivity. This in turn modifies the current distribution. Hence, this is a nonlinear problem. A modified spectral domain method in combination with the iteration process was developed which can analyze the propagation characteristics of the superconducting planar transmission lines. The first step is to modify the spectral domain method in such a way that the position dependent surface resistance is included in the formulation. Next, in order to invoke the standard spectral domain format, the current distribution is expressed in terms of Fourier transforms of the subsectional basis functions. For an assumed current distribution, an iteration process is initiated with an assumption that the surface resistance is constant. After the current distribution is obtained, the surface resistance is readjusted and the process continues until convergence is reached. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 02, 1991
- Accession Number
- ADA241537
Entities
People
- Tatsuo Itoh
Organizations
- University of California, Los Angeles