Dual-mode dual-band bandpass filter design using open-loop resonators

作者：Liu Haiwen^*; Zhao Yulong; Shi Liyun; Luo Hui

来源：Microwave and Optical Technology Letters, 2012, 54(10): 2370-2372.

DOI：10.1002/mop.27080

• non-degenerate modes
• bandpass filter
• dual-band
• open loop resonator
• dual-mode

This letter presents a novel dual-band bandpass filter using dual-mode open-loop resonator. Non-degenerate modes of the dual-mode resonator are excited by loading a center-loaded T-shaped stub and its nature is investigated through the even-odd mode analysis. Based on the aforementioned dual-mode resonators, a compact dual-band filter is designed. Results verify that the fabricated filter with the central frequencies of 1.8 and 2.4 GHz and the fractional bandwidth of 8.3 and 12.9% are obtained. Also, there are several transmission zeros located at both sides of each passband. It provides the filter with improved selectivity and stopband suppression.

• 出版日期2012-10
• 单位华东交通大学