基于交叉结构的混合左右手传输线单元设计  

Design of CRLH Transmission Line Unit Cell Based on a Lattice Topology

作　　者：黄文[1] 董金生[2] 

机构地区：[1]重庆邮电大学光电工程学院,重庆400065 [2]中国电子科技集团公司第二十九研究所,四川成都610000

出　　处：《压电与声光》2015年第3期427-429,436,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(61401054);重庆市教委科研基金资助项目(KJ1400417);重庆邮电大学自然科学基金资助项目(A2013-38);重庆邮电大学博士启动基金资助项目(A2013-16)

摘　　要：提出了一种基于交叉结构的混合左右手传输线(CRLH-TL)单元的设计方法。基于CRLH-TL理论,结合交叉结构单元的等效电路,分析其Bloch阻抗及Bloch传播常数,并采用电磁仿真软件构建出3层介质板的微带线结构来进行物理实现。仿真结果表明,此交叉结构CRLH-TL的带宽为20.2GHz,插入损耗低于0.5dB,回波损耗大于10dB。中心频率为6GHz,此时传输线的相移为0。结果表明,此基于交叉结构的CRLH-TL结构小巧,性能良好。A design method for composite right/left-handed transmission line（CRLH-TL）unit cell based on a lattice topology is proposed in this paper. Based on the theory of CRLH-TL and combing with the equivalent circuit of a lattice topology, the Bloch impedance and Bloch propagation constant are analyzed, and the microstrip-line structure with three-layer dielectric-slab is constructed using the electromagnetic simulation software for physical im- plementation. The simulation results show that the bandwidth of lattice structure of CRLH-TL is 20.2 GHz, with insertion loss below 0.5 dB and return loss greater than 10 dB. The center frequency is 6 GHz when the phase shift of the transmission line is zero. Thus the CRLH-TL cell based on a lattice topology is proved not only compact, but also has good performance.

关 键 词：混合左右手 传输线 交叉结构 3层 Bloch阻抗 

分 类 号：TN817[电子电信—信息与通信工程]