Abstract
A novel reconfigurable-bandwidth wideband bandpass filter (WB BPF) with independently controllable notch band is presented. The proposed BPF starts from a terminated cross-shaped resonator (TCSR) with two open-ended stubs and a pair of parallel-coupled lines. Theoretical analysis finds that the filter bandwidth is independently controlled by TCSR, while the center frequencies and bandwidth of notch bands are mainly controlled by the rest parts. As such, a reconfigurable-bandwidth BPF with controllable notch band, whose bandwidth and center frequency are fixed under different work states, can be designed with the help of PIN diodes. As the measured and simulated agree well, a simple and effective design approach of reconfigurable WB BPFs can be validated.
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