提出了一种基于平板波导的新型异向谐振结构--交叉椅型谐振结构,通过理论分析和数值计算,说明和验证了单个交叉椅型谐振结构加载的平板波导具有双通带特性和异向特性;设计了一种由多个交叉椅型谐振结构周期加载的异向平板波导结构,并通过仿真实验验证了其负折射特性。交叉椅型谐振结构的全金属半封闭式结构和其特殊的电磁谐振方式,使得此类2维异向平板波导与传统的由金属开口谐振环与金属线正交阵列而成的2维异向介质相比,具有双通带、无介质损耗、功率容量大等特异性质;单个交叉椅型谐振结构加载的平板波导作为一种新型的滤波器结构,具有良好的双通带特性,尺寸较小。

The cross-chairs-shaped resonator(CCSR),a new structure of the planar waveguide periodically loaded with a novel resonant structure,is presented. Theoretical analysis,numerical calculation and simulation results show and verify the properties of 2D left-handed materials (2D LHM) in two frequency bands. Compared with the conventional 2D LHM consisting of orthogonal arrays of wires and split ring resonators,this 2D LHM has some novel properties:double-band-pass,no medium loss,higher power capacity and so on because of the cross-chairs-shaped resonator’s all-metallic structure and special resonant ways. Meanwhile,the CCSR unit cell loading planar waveguide is a new type of planar waveguide dual-bandpass filter with perfect bandpass characteristic and small size.