Realization of transmission zeros for bandpass filter using inductive-coupled stub-loaded resonators

被引：4
作者：
Cheng, Fei [1 ]
Lu, Ping [1 ]
Huang, Kama [1 ]
机构：
[1] Sichuan Univ, Coll Elect & Informat Engn, Minist Educ, Key Lab Wireless Power Transmiss, Chengdu 610065, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES | 2020年 / 12卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Transmission zero; inductive-coupling; stub-loaded resonator;
D O I：
10.1017/S1759078719001041
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：
This article proposes a bandpass filter with three controllable transmission zeros (TZs) using three inductive-coupled stub-loaded resonators (SLRs). Different from other works, the proposed SLR can create one transmission pole and one TZ. With the TZs above the passband, high stopband rejection level is achieved. Moreover, the K-inverters are realized by short-circuit stubs between two adjacent SLRs. A general synthesis method for this kind of filter is described. For verification, a filter centered at 2.44 GHz with 0.18 GHz bandwidth is designed. The measured results show that the filter has three TZs at 3.1, 3.9, and 5 GHz. With those TZs, the filter's stopband rejection level is greatly improved.
引用
收藏
页码：34 / 38
页数：5
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