A Compact Wide-Range Frequency and Bandwidth Reconfigurable Filter

作者：Tian, Mingen; Long, Zhihe; Feng, Lijun; He, Leilei; Zhang, Tianliang^*

来源：IEEE Microwave and Wireless Components Letters, 2022, 32(11): 1283-1286.

DOI：10.1109/LMWC.2022.3178722

• Bandpass filter (BPF)
• reconfigurahle
• switching diode
• wide range

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 hand and high-frequency band, greatly broaden the tunable range of the center frequency (f(0)). When the 3-dB bandwidth of WRBPF is 180 MHz, f(0) can he adjusted from 0.78 to 1.93 GHz, and the relative adjustment range is 84.9%. When f(0) is 1.355 GHz, the absolute bandwidth can he 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 0.29 lambda g x 0.22 lambda g. The experimental results show that WRBPF has not only a simple structure but also an excellent performance.

• 单位
  电子科技大学