A triple-wideband bandpass filter with controllable bandwidths based on stub-loaded resonators

作者：Gong, Li; Xiong, Yang; Zhang, Fan; Wang, LiTian; Sun, Yan; Zhao, XinJie; He, Ming; Ji, Lu; Zhang, Xu^*; Zhang, Bo

来源：International Journal of Microwave and Wireless Technologies, 2018, 10(8): 904-910.

DOI：10.1017/S1759078718000867

• Bandpass filter (BPF)
• controllable bandwidths
• multi-mode stub-loaded resonators (MMSLRs)
• triple-wideband

In this paper, a triple-wideband bandpass filter (BPF) with controllable bandwidths based on two multi-mode stub-loaded resonators (MMSLRs) and a triple-mode resonator is presented. The MMSLR is loaded with two identical folded open-ended stubs and a T-shaped stub. Each passband of the tri-band BPF is formed by four resonant modes, which provide sufficient bandwidths to meet various application requirement. By adjusting the lengths of open-ended stubs, three passband bandwidths can be controlled individually. The center frequencies of the triple-wideband BPF are allocated at 2.7, 3.67, and 5.44 GHz, with the 3 dB fractional bandwidths (FBWs) of 20.1, 14.7, and 26.3%. Among the three passbands, the highest one covers the 5 G WiFi band (5.15-5.85 GHz). The measured results of the proposed filter exhibit excellent agreement with simulated results.

• 出版日期2018-10
• 单位南开大学