A Comparative Study of Simulation Methods for Patch Antenna Strain Sensors

2022 19th International Multi-Conference on Systems, Signals & Devices (SSD) Pub Date : 2022-05-06 DOI:10.1109/SSD54932.2022.9955918

D. Rajendran, O. Kanoun

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Abstract

Passive wireless strain sensors based on microstrip patch antennas recently show significant promise for reliable health and performance monitoring in the aerospace and civil industries. Microstrip patch antenna consists of a metal patch, dielectric substrate, and metal grounding plate. When excited by the signal, an electro-magnetic resonant cavity is formed between the conductor patch and the grounding plate and radiates outward through the gap between the patch and the grounding plate. These antennas radiate at their resonant frequency. When the antenna experiences deformation, the antenna shape changes, causing a shift in the electromagnetic resonance frequency of the antenna. For this purpose, the antenna design is critical to influencing both RF characteristics and strain sensing behavior. In this work, a passive wireless strain sensor using a microstrip patch antenna with feed-inset operating at 2.8 GHz was designed and simulated in different simulation methods using simulation software CST Microwave studio and COMSOL Multiphysics. The simulation results were compared regarding the patch antenna's processing time, linearity, and sensitivity for strain sensing. Among these methods, strain and RF simulation of patch antenna using COMSOL software show better accuracy and linear response towards strain.

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贴片天线应变传感器仿真方法的比较研究

基于微带贴片天线的无源无线应变传感器最近在航空航天和民用工业中显示出可靠的健康和性能监测的重大前景。微带贴片天线由金属贴片、介质衬底和金属接地板组成。在信号的激励下，导体贴片与接地板之间形成电磁谐振腔，并通过贴片与接地板之间的间隙向外辐射。这些天线以共振频率辐射。当天线发生变形时，天线的形状会发生变化，导致天线的电磁谐振频率发生偏移。为此，天线设计对于影响射频特性和应变传感行为至关重要。本文设计了一种工作频率为2.8 GHz的无源无线应变传感器，并利用CST Microwave studio和COMSOL Multiphysics仿真软件，采用不同的仿真方法进行了仿真。仿真结果比较了贴片天线应变传感的处理时间、线性度和灵敏度。其中，利用COMSOL软件对贴片天线进行应变和射频仿真具有较好的精度和对应变的线性响应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 19th International Multi-Conference on Systems, Signals & Devices (SSD)

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