Enhancing the Sensitivity of Wireless LC Sensors Using Time Modulation

Abstract

We present an exceptional point (EP)-based temporally modulated wireless passive sensor, surpassing partly the shortcomings of traditional sensor structures, such as energy-consuming, low sensitivity, and hard-to-integrate. For traditional sensors, those factors mentioned above restrict the scope of applications. To address these limitations, temporally modulated EPs are introduced into LC tank sensing topologies. Originating from quantum mechanics, EPs are characterized by the coalescence of a system's complex eigenvalues, leading to considerable frequency splitting in response to minor perturbations. In this letter, comprehensive simulation results validate the feasibility and enhanced performance of this approach, confirming its superiority over existing sensor technologies. The introduction of EP-based wireless sensors equipped with time modulation marks a significant advancement in the field, promising substantial improvements in the sensitivity and accuracy of wireless sensors for a variety of applications.