基于单个CSRR CRLH结构的双频带通滤波器  

Dual Band Bandpass Filter Based on A Single CSRR CRLH Structure

作　　者：卞耀冬 王伟[1,2] 尹镕基 姚斌 辛志慧[1,2] BIAN Yaodong;WANG Wei;YIN Rongji;YAO Bin;XIN Zhihui(College of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China;Yunnan Key Laboratory of Opto-electronic Technology,Kunming 650500,China)

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650500 [2]云南省光电信息技术重点实验室,云南昆明650500

出　　处：《云南师范大学学报（自然科学版）》2023年第1期45-50,共6页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：国家自然科学基金资助项目(61751108);云南省自然科学基金资助项目(202201AT070027);兴滇英才支持计划资助项目(00900201329916005)。

摘　　要：提出了一种基于单个互补开口谐振环(CSRR)的复合左右手(CRLH)结构双频带通滤波器,利用CSRR CRLH结构谐振特性,并通过延长、弯曲开路枝节线,引入新的传输零点同时缩小滤波器的尺寸,实现了滤波器双通带、高选择性和小型化.加工并测试了基于CSRR CRLH结构的双频带通滤波器的原型(尺寸为3 cm×3 cm),结果显示第一通带和第二通带的中心频率和插入损耗分别为1.9 GHz/1.7 dB和2.9 GHz/2.8 dB,在DC-1.05 GHz、2.20-2.50 GHz和3.45-4.00 GHz阻带范围内的带外抑制优于20 dB,实现了双频带通特性.A dual band band-pass filter based on a single complementary split ring resorator(CSRR)is proposed.By using the resonance characteristics of the CSRR CRLH structure,and by extending and bending the open circuit branch lines,introducing new transmission zeros and simultaneously reducing the size of the filter,the dual band,high selectivity and miniaturization characteristics of the filter are realized.The prototype of dual band bandpass filter based on CSRR CRLH structure is fabricated and tested,with a size of 3 cm×3 cm.The test results show that the center frequency and insertion loss of the first passband and the second passband are 1.9 GHz/1.7 dB and 2.9 GHz/2.8 dB respectively,and the out of band suppression in the stopband range of DC-1.05 GHz,2.20-2.50 GHz and 3.45-4.00 GHz is better than 20 dB,realizing the dual band pass characteristics.

关 键 词：双频带通滤波器 互补开口谐振环(CSRR) 复合左右手(CRLH) 传输零点 小型化 

分 类 号：TN713[电子电信—电路与系统]