Full-Wave Analysis of Planar Transmission Lines With Layered Lossy Anisotropic Media and High-T/sub c/ Superconductors

A modified spectral domain immittance approach is presented which takes into account all practical parameters for the calculation of slow-wave and loss characteristics in modem MMIC and high-Tc superconductor microsmp transmission line structures. The method is capable of considering multilayered anisotropic substrates, conductor, dielectric and gyromagnetic losses, alternative directions for the magnetic bias, the finite-thickness of conventional or super-conducting strips, and lossy ground metallizations. At the example of ferrite-dielectric layered high-Tc superconducting microstrip lines, it is demonstrated that the line characteristics largely depend on both losses and the tensor parameters of anisotropic materials.