论文部分内容阅读
研究了面状分布缺陷开口谐振环(split ring resonators,SRRs)组对三维左手材料的微波透射行为的影响.用电路板刻蚀技术制备了以六边形SRRs与金属铜Wires组合为结构单元的三维左手材料样品,利用波导法测量了含有不同空间取向面缺陷SRRs构成的三维左手材料X波段(8-12GHz)微波透射行为.实验表明,相对于无缺陷情形,面缺陷的引入使谐振峰谐振频率移动,且红移、蓝移的情况都存在;谐振强度明显下降,最多达到19.3 dB,相当于原来的46%;通频带宽在[315-817.5 MHz]范围变化.面缺陷的存在破坏了材料的周期性结构,导致形成新的电磁谐振条件、谐振峰发生变化.不同空间取向的面缺陷对材料周期性结构改变程度不同,其缺陷效应差异较大.相对于点缺陷、线缺陷,面缺陷效应更强.
The effect of planar ring resonators with split ring resonators (SRRs) on the microwave transmission of three-dimensional left-handed materials was investigated. The hexagonal SRRs and metallic copper wires were used as the structural units The three-dimensional left-handed material samples were measured by waveguide method, and the X-band (8-12GHz) microwave transmission behavior of three-dimensional left-handed materials with different SRRs was measured.The experimental results show that the introduction of surface defects resonates the resonant peak The frequency shift, and the redshift, the blue shift are all present; the resonant strength drops significantly, up to 19.3 dB, which is equivalent to 46% of the original; the passband changes in the [315-817.5 MHz] range. The periodic structure of materials leads to the formation of new electromagnetic resonance conditions and the change of resonance peak.Different spatially oriented surface defects have different degrees of periodic structural changes to the materials with significant differences in their defect effects.Compared with the point defects, Defective effect stronger.