Huraian
The parameters of the transmission line for low and high-temperature superconducting materials (YBCO at 90.9K, and Nb at 4.2 K) stripline were studied theoretically. This study was done with respect to miniaturization in terms of surface impedance, phase velocity, attenuation and characteristic impedance by using the theory of Mattis and Bardeen. The results were compared with the normal conductor (Cu) at low and high-temperatures (4.2and 295 K).