Microstrip passband filters with 3, 6, and 11 poles, as well as microstrip resonators, have been fabricated using postannealed Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub x/ (YBCO) films deposited on LaAlO/sub 3/ substrates using three-target simultaneous co-sputtering. The insertion loss in the passband for the filters with center frequencies between 9.5 and 13.4 GHz was
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Rensch et al. (1991) studied this question.
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