High-selective triple-mode SIW bandpass filter using higher-order resonant modes

被引:28
作者
Liu, Qing [1 ]
Zhou, Dongfang [1 ]
Shi, Jian [1 ]
Hu, Tao [1 ]
机构
[1] PLA Strateg Support Informat Engn Univ, Dept Electromagnet Wave & Antenna Propagat, Zhengzhou 450001, Henan, Peoples R China
关键词
INTEGRATED WAVE-GUIDE;
D O I
10.1049/el.2019.3234
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A novel high-selective triple-mode substrate integrated waveguide (SIW) bandpass filter using higher-order resonant modes is proposed in this Letter. The new triple-mode SIW resonator is realised by the second degenerate dual modes TM210 and one perturbed higher-order mode TM020 in a circular SIW cavity. The resonance of TM020 mode can be independently moved to that of dual modes TM210 by changing the size of a floating circular patch. The proposed triple-mode SIW filter can produce three finite-transmission zeros (FTZs), which can also be controlled well by the angle between two feeding lines. For the demonstration, a triple-mode SIW filter with the centre frequency of 13.5 GHz was designed, fabricated and measured. The proposed triple-mode circular SIW filter has the merits of the high-quality factor, high selectivity and controllable bandwidth as well as FTZs.
引用
收藏
页码:37 / +
页数:3
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