This letter proposes a wide-range reconfigurable bandpass filter (WRBPF) based on the cross-shape triple-mode resonator. Varactor diodes and switching diodes are utilized at the ends of the resonator and the positions of external coupling, which combines the two working modes of the low-frequency band and high-frequency band, greatly broaden the tunable range of the center frequency ( f0f_{0} ). When the 3-dB bandwidth of WRBPF is 180 MHz, f0f_{0} can be adjusted from 0.78 to 1.93 GHz, and the relative adjustment range is 84.9%. When f0f_{0} is 1.355 GHz, the absolute bandwidth can be adjusted from 110 to 950 MHz, and the relative bandwidth adjustment range is 8.1%–70.1%. Moreover, the circuit size of WRBPF is only 0.29λg×0.22λg0.29\,\,\lambda g\,\,\times 0.22\,\,\lambda g . The experimental results show that WRBPF has not only a simple structure but also an excellent performance.

中文翻译：

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紧凑型宽范围频率和带宽可重构滤波器


这封信提出了一种基于十字形三模谐振器的宽范围可重构带通滤波器（WRBPF）。谐振器两端和外耦合位置采用变容二极管和开关二极管，结合了低频段和高频段两种工作模式，大大拓宽了中心频率的可调范围（f0f_{ 0}）。当WRBPF的3dB带宽为180MHz时，f0f_{0}的调节范围为0.78～1.93GHz，相对调节范围为84.9%。当f0f_{0}为1.355 GHz时，绝对带宽可调节范围为110～950 MHz，相对带宽调节范围为8.1%～70.1%。而且，WRBPF的电路尺寸仅为0.29λg×0.22λg0.29\,\,\lambda g\,\,\times 0.22\,\,\lambda g 。实验结果表明，WRBPF不仅结构简单，而且性能优良。