基于双模开环谐振器的双频带滤波器设计  

Design of Dual-Band Filter based on Double-Mode Open-Loop Resonator

作　　者：易康 邢孟江[1] 侯明[1] 李小珍 代传相 YI Kang;XING Meng-jiang;HOU Ming;LI Xiao-zhen;DAI Chuan-xiang(School of Information Engineering and Automation,Kunming University of Science and Technology,Kunming Yunnan 650500,China;Department of Information and Technology,Kunming University,Kunming Yunnan 650500,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500 [2]昆明学院信息技术学院,云南昆明650500

出　　处：《通信技术》2020年第5期1290-1293,共4页Communications Technology

基　　金：国家自然科学基金项目(No.61564005,No.61864004)。

摘　　要：基于开环双模谐振器设计了一种双频带通滤波器,由两个中心重合的正方形开口环谐振器组成。分析该谐振器的奇偶模谐振频率与传输零点,每个通带内有两个谐振模式。该滤波器中心频率分别为4.5 GHz和6.5 GHz,3 dB相对带宽FBW分别为11%、5%,两通带带内插入损耗分别小于0.6 dB、1.4 dB,带内回波损耗分别优于19.5 dB、16.5 dB,高频处阻带抑制达到50 dB,两通带之间隔离度达到53 dB,尺寸仅为6 mm×11 mm×1.09 mm。Based on double mode open-loop resonator, a dual-band pass filter is designed, which consists of two square split-ring resonators whose centers coincide. The odd-even mode resonant frequency and transmission zero point of the resonator are analyzed, and there are two resonance modes in each passband. The center frequency of the filter is 4.5 GHz and 6.5 GHz, and the 3 dB fractional bandwidth (FBW) is 11% and 5%, respectively. The in-band insertion loss of the two passbands is less than 0.6 dB and 1.4 dB respectively, and the in-band return loss is better than 19.5 dB and 16.5 dB, respectively. The stop band rejection at high frequencies reaches 50 dB, the isolation between the two passbands reaches 53 dB, and the size is only 6 mm × 11 mm × 1.09 mm.

关 键 词：双模谐振器 双频带 带通滤波器 传输零点 插入损耗 

分 类 号：TN713[电子电信—电路与系统]