Design of a Novel Miniaturized Wide Stopband Filtering Coupler

被引：0
|
作者：
Mo X. [1 ]
Yuan Y. [1 ]
Li M. [1 ]
Zhang P. [2 ]
Yan Y. [1 ]
Zhao G. [1 ]
Tu Z. [1 ]
机构：
[1] Key Lab of Ministry of Education of Intelligent Computing & Signal Processing, Anhui University, Hefei
[2] Anhui Science and Technology University, Bengbu
来源：
Progress In Electromagnetics Research M | 2023年 / 119卷
基金：
中国国家自然科学基金;
关键词：
Compendex;
D O I：
10.2528/PIERM23070203
中图分类号：
学科分类号：
摘要：
This paper designs a miniaturized, wide stopband microstrip filtering coupler based on coupled resonators. Firstly, a short-stub loaded uniform-impedance resonator (SSLUIR) is proposed, and the size of the SSLUIR is reduced by adjusting the impedance ratio of the stubs and bending them. Then, the resonance performance of SSLUIR during electrical and magnetic coupling is studied. By adjusting the electrical length of the short stubs, higher harmonics are suppressed, and the upper stopband is widened. Finally, a 3 dB 180◦ microstrip filtering coupler is designed based on SSLUIRs. The measurement results show that the center frequency of the filtering coupler is 2.43 GHz, with a relative bandwidth of 6.6%. It can suppress harmonics within the 8.2f0 range by more than 18 dB and has a size of 0.23λg × 0.33λg. The correctness of the design method for miniaturized and wide stopband filtering coupler has been verified. © 2023, Electromagnetics Academy. All rights reserved.
引用
收藏
页码：105 / 116
页数：11
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