Dual mode bandpass filter with switchable response

Jia-Lin Li – Ke-Xin Song – Li-Fei Jiang – Jin-Pu Yang – Shao-Qian Zhou

   A compact dual-mode bandpass filter with independently tunable second passband is proposed based on modified V shaped resonators. By switching the pin diodes at each end of the studied resonators, the second passband is independently tuned without affecting the first passband. A prototype of the dual-mode bandpass filter with a dual-passband of 2.54 GHz and 3.36 GHz or a single passband of 2.54 GHz is designed and verified experimentally.

Keywords: microstrip filter, switchable, dual-mode, bandpass filter

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