ABSTRACT
In this chapter, the authors discuss the differences and similarities in performance of the circuits made of the various materials. The main differences center around the ease of flux motion within Tl–Ca–Ba–Cu–O and the very different grain boundary structure from that seen in Y–Ba–Cu–O. The Tl–Ca–Ba–Cu–O circuits discussed have been made from both 2223 and 2122 phases. High-temperature superconducting (HTS) electronics is divided into three groups: passive electronics, Josephson-based electronics, and non-Josephson active devices. In each case a brief review of the relevant superconducting properties is given along with demonstrated circuits and performance, advantages over conventional counterparts, and a materials discussion. Hence much of the work on HTS passive electronics has centered on microwave or near-microwave circuits, including filters, delay lines, antennas, and related components. It has been seen earlier that HTS filters and delay lines offer performance considerably better than that available with conventional technology.
