Al-Naib Ibraheem, Ateeq Ijlal Shahrukh
Biomedical Engineering Department, College of Engineering, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia.
Materials (Basel). 2022 Aug 26;15(17):5921. doi: 10.3390/ma15175921.
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 -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.
本文提出了一种在矩形波导内使用单个完全对称的开口环谐振器（SRR）激发尖锐非对称谐振的新方法。该方法基于通过将对称开口环谐振器沿其水平轴放置在远离波导中心的位置来实现对其激发的不对称性。相应地，在模拟结果和测量数据的传输幅度中都观察到了显著的非对称谐振。使用一个与矩形波导中心距离为6 mm的非对称距离的单个对称SRR，在6.9 GHz处激发了一个品质因数为314的尖锐谐振。更重要的是，一项模拟具有不同折射率的不同覆盖层分析物的参数研究表明，对于150μm的分析物厚度，波长灵敏度为579,710 nm/RIU。
