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

作     者：ZHANG Jin-ling ZHANG Hong-xin LU Ying-hua ZHANG Li-kun 

作者机构：School of Telecommunication Engineering Beijing University of Posts and Telecommunications Translation Department 

出 版 物：《The Journal of China Universities of Posts and Telecommunications》 (中国邮电高校学报（英文版）)

年 卷 期：2013年第20卷第4期

页      面：112-115页

核心收录：

学科分类：0810[工学-信息与通信工程] 080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 081001[工学-通信与信息系统] 

基　　金：supported by the National Natural Science Foundation of China (61171051  61202399  61072136) 

主　　题：DGS band-stop filter dual-resonant characteristics unsymmetrical T-shape 

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.