Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1998/10/25 Vol. E81-CNo. 10pp. 1573-1577 Type of Manuscript: INVITED PAPER (Special Issue on Low- and High-Temperature Superconductive Electron Devices and Their Applications) Category: Analog Applications Keyword: high-temperature superconductor, HTS, bandpass filter, filter subsystem, front-end,