非对称式双层LC谐振结构的无线无源柔性压力传感器设计

Design of Wireless Passive Flexible Pressure Sensor Based on Asymmetric Double Layer LC Resonant Structure

通过归纳LC谐振器的基本工作原理,分析双层非对称式LC谐振结构的互感耦合模型,提出了一种新式非对称式双层LC谐振结构的无线无源柔性压力传感器的设计方案。通过建立集总电路模型,用SPICE软件进行电路仿真分析验证该设计模型的可行性,并用HFSS软件电磁仿真对比该结构与单层LC结构以及双层对称式LC结构区别。结果表明,该设计利用双层非对称式LC结构的特定耦合方式,降低了初始谐振频率,增大了品质因子,相对灵敏度提高了6.6%。

In this work,a new design scheme of wireless flexible pressure sensor with asymmetric double-layer LC resonant structure is proposed by summarizing the basic working principle of LC resonator and analyzing the mutual inductance coupling model of double-layer asymmetric LC resonant structure.Based on the lumped circuit model,the feasibility of the design model is verified by circuit simulation analysis with SPICE software,and the differences between this structure and single-layer LC structure and double-layer symmetrical LC structure are compared by electromagnetic simulation with HFSS software.The results show that the initial resonance frequency is reduced,the quality factor is increased and the relative sensitivity is increased by 6.6%.