1. Miniaturization of Triple-Mode Wideband Bandpass Filters.
- Author
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Zhang, Zhi-Chong, Yu, Xu-Zhou, Wong, Sai-Wai, Zhao, Bing-Xiong, Lin, Jing-Yu, Zhang, Xiao, and Tam, Kam-Weng
- Subjects
BANDPASS filters ,CIRCUIT complexity ,TRANSMISSION line matrix methods ,QUALITY factor - Abstract
In this article, a class of wideband bandpass filters (BPFs) using triple-mode coaxial resonators has been introduced. Each triple-mode resonator is utilized with TM010 mode, TE− mode, and TE+ mode orthogonal to each other. Two L-shaped feeding probes and a loading disk are adopted to implement the miniaturization of these wideband BPFs. To observe the degree of miniaturization, we set a design specification of the same fractional bandwidth (FBW) of 40% at the same central frequency of 2.5 GHz. After employing the L-shaped feeding probes and loading disk, the efficient circuit size without cavity thickness is reduced by 80% compared with the triple-mode wideband filter without L-shaped feeding probes and loading disk. In contrast, the unloaded quality factors are slightly changed. In addition, another advantage of this work is that the upper stopband is extended to $2.5f_{0}$. Three experimental wideband BPFs in the large, medium, and small sizes are designed, manufactured, and tested for demonstration. Good agreements are obtained between simulation and experiment. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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