Abstract
In this paper, biosensor based on an asymmetric single split resonator (SRR) which is excited by a high-impedance microstrip line at microwave frequencies is presented. According to the previously obtained results, good resonance peaks have been demonstrated in the symmetric SRR, but the Q value of SRR is still lower. We carry out our discussion on the working principle by comparing the transmission characteristics (S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</sub> ) and sensitivity of both the symmetric and asymmetric SRR biosensors. The simulated results show that the asymmetric SRR is a compact configuration and achieve narrow resonance with a higher Q value of 56, while the symmetric SRR has a Q value of 52. Furthermore, coating with different thickness of biologic samples, the asymmetric SRR exhibits a more sensitive performance. These results indicate that the asymmetric biosensor has high sensitivity, which makes it great promising applications for biosensors in future.
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