Dual-band-stop filters with unsymmetrical T-shape DGS resonators

doi:10.1016/S1005-8885(13)60078-3

Acta Metallurgica Sinica(English letters) ›› 2013, Vol. 20 ›› Issue (4): 112-115.doi: 10.1016/S1005-8885(13)60078-3

Dual-band-stop filters with unsymmetrical T-shape DGS resonators

张金玲¹,张洪欣²

1. School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China 2. Translation Department, Beijing 100015, China

收稿日期:2013-03-01 修回日期:2013-04-02 出版日期:2013-08-31 发布日期:2013-08-30
通讯作者: 张金玲 E-mail:zhangjl@bupt.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (61171051, 61202399, 61072136).

Dual-band-stop filters with unsymmetrical T-shape DGS resonators

,Hong-Xin ZHANG

1. School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China 2. Translation Department, Beijing 100015, China

Received:2013-03-01 Revised:2013-04-02 Online:2013-08-31 Published:2013-08-30
Supported by:
This work was supported by the National Natural Science Foundation of China (61171051, 61202399, 61072136).

摘要/Abstract

摘要： A kind of dual-band-stop filter with an unsymmetrical T-shape defected ground structure (DGS) is proposed. The filter has two band gap centers at 4.9 GHz and 7.35 GHz, respectively, where the two centre frequencies are just the second and third harmonics 2.45 GHz. The filters with high band-stop performance and wideband spurious suppression can be achieved by cascading miniaturized unsymmetrical T-shape DGS. The attenuation of three-cascaded T-shape DGS filter is 30.77 dB at 4.9 GHz and 17.96 dB at 7.35 GHz respectively. The above experimental results are in good agreement with the simulation results, especially for the third harmonic.

关键词: DGS, band-stop filter, dual-resonant characteristics, unsymmetrical T-shape

Abstract: A kind of dual-band-stop filter with an unsymmetrical T-shape defected ground structure (DGS) is proposed. The filter has two band gap centers at 4.9 GHz and 7.35 GHz, respectively, where the two centre frequencies are just the second and third harmonics 2.45 GHz. The filters with high band-stop performance and wideband spurious suppression can be achieved by cascading miniaturized unsymmetrical T-shape DGS. The attenuation of three-cascaded T-shape DGS filter is 30.77 dB at 4.9 GHz and 17.96 dB at 7.35 GHz respectively. The above experimental results are in good agreement with the simulation results, especially for the third harmonic.

Key words: DGS, band-stop filter, dual-resonant characteristics, unsymmetrical T-shape

Zhang JIn-ling, Zhang Hong-xin, LU Ying-hua, ZHANG Li-kun. Dual-band-stop filters with unsymmetrical T-shape DGS resonators[J]. Acta Metallurgica Sinica(English letters), 2013, 20(4): 112-115.

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Dual-band-stop filters with unsymmetrical T-shape DGS resonators

Dual-band-stop filters with unsymmetrical T-shape DGS resonators

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