Excitation of Asymmetric Resonance with Symmetric Split-Ring Resonator

Abstract

In this paper, a new approach to excite sharp asymmetric resonances using a single completely symmetric split-ring resonator (SRR) inside a rectangular waveguide is proposed. The method is based on an asymmetry in the excitation of a symmetric split-ring resonator by placing it away from the center of the waveguide along its horizontal axis. In turn, a prominent asymmetric resonance was observed in the transmission amplitude of both the simulated results and the measured data. Using a single symmetric SRR with an asymmetric distance of 6 mm from the center of a rectangular waveguide led to the excitation of a sharp resonance with a Q-factor of 314 at 6.9 GHz. More importantly, a parametric study simulating different overlayer analytes with various refractive indices revealed a wavelength sensitivity of 579,710 nm/RIU for 150 μm analyte thickness.

Shielding Performance of Electromagnetic Shielding Fabric Implanted with “Split-Ring Resonator”

“…As shown in Figure 1 a, in this structure, an opening is added on a conductive ring to make it equivalent to a resonant circuit composed of inductance and capacitance. Two concentric split rings with different sizes are placed in reverse, which can offset the electric dipole moments generated by the two rings, thereby enhancing the electromagnetic wave loss effect of the SRR [ 34 ]. As shown in Figure 1 b, this article selects conductive stainless-steel filaments and the invisible embroidery technology to form SRRs with different parameters in the EMS fabric, use the SRR characteristics to counteract electromagnetic waves and achieves the purpose of improving the SE of the EMS fabric.…”