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This paper presents the performance of tunable bandpass filters using high Q, wide-tuning-range passive tunable ICs. These passive tunable ICs are fabricated using ParaScan™, Paratek’s proprietary doped BST material. The tunable capacitors in these passive ICs have a tuning ratio of 4.15:1 and a Q factor over 100, from 100 MHz to 1 GHz. Two tunable filters using these passive tunable ICs were designed,...