紧凑型复合左右手传输线电磁特性

提出了基于正六边形互补开口单环谐振器对的紧凑型复合左右手传输结构和其等效电路模型。通过对结构参数的仿真分析,明确了该型传输线的作用机理,实现了对谐振频点和带宽的操控;设计的传输线在4GHz处实现了左右手的无缝连接,其-10dB阻抗带宽达到了1.85GHz(3.61~5.46GHz),相对带宽达到了40.8%;采用转移参数矩阵与Bloch-Floquet理论对电路模型进行了深入分析,电磁仿真模型、等效电路模型和测试结果的高度一致性证明了等效电路模型的合理性与有效性;并提取了等效电磁参数模型,验证了该结构的负折射率与后向波传输特性。

A Study of Electromagnetic Characteristics on Novel Compact Composite Right/Left-Handed Transmission Line

A novel resonant-type composite right/left-handed transmission line and its correlative lumped-element equivalent circuit model are presented based on regular hexagon complementary single split ring resonator pair. The effective mechanism of its transmission lines is further defined, the control of the resonance frequency and that of the transmission band are realized through analysis of the structure parameters. A perfect balanced condition at 4 GHz is accomplished for the novel CRLH TL, and its impedance bandwidth comes to 1.85 GHz (3.61~5.46 GHz), and the relative bandwidth comes to 40.8%. The circuit model is analyzsed in depth by adopting transfer parameter matrix and Bloch-Floquet theory. A high coincidence of parameters'' results of the circuit model and the electromagnetic simulation proves the correctness and efficiency of the circuit model. And a balanced condition is extracted. The negative refractive index and the backward wave propagation are demonstrated by the effective electromagnetic parameter retrieval.