通过理论分析、电磁仿真和实验测量,研究了U形金属开口谐振环对(Split Ring Resonator Pair,SR-RP)在微波波段的电磁响应。利用等效电路方法研究SRR及SRRP的电磁响应特性,解释了SRRP构成的周期阵列中由于电磁耦合作用引起的共振模劈裂现象。并通过电磁全波仿真与实验测量,进一步研究了构成SRRP的两谐振环的夹角变化引起的传输特性的变化,传输曲线上的共振模劈裂程度随着两谐振环夹角在0°~180°范围内的变化呈现先减小后增大的变化趋势。
The propagation of microwaves through a pair of U-shaped split-ring resonators (SRRP) is theoretically and experimentally studied. We study the electromagnetic response of SRR and SRRP by utilizing equivalent circuit equations. The dependence of the propagation properties of a unit cell containing two identical split-ring resonators on twist angles is investigated by experiments and electromagnetic simulation. By increasing the twist angle Ф, the two resonance branches first tend to converge, then the two branches shift away from one another.