A High-Resolution Active Microwave Sensor for Contactless Pressure Measurement
Journal Title: Applied Electromagnetics - Year 2023, Vol 11, Issue 1
Abstract
In this paper, an active contacless microwave pressure sensor with high-quality factor for harsh environment applications are presented. The proposed sensor operates at 1.2GHz and consists of two parts of a reader antenna and a passive Split Ring Resonator (SRR). A movable pad is located above the resonator by considering an air gap between them and this gap is decreased when external pressure is applied. By decreasing the gap, the resonant frequency of SRR is decreased. The resonant frequency of SRR is measured by using the insertion loss scattering parameter through the reader part, wirelessly. To improve the resolution, the sensorâs quality factor is enhanced by using an active circuit with a positive feedback design in the reader part. Therefore, the quality factor of the passive sensor is increased from 73.91 to 3268 by using the active sensor. The sensitivity of the sensor is 70MHz/mm in both passive and active sensors. The proposed sensor is simulated and studied using CST and ADS software.
Authors and Affiliations
Ali Keyvanlou,Morteza Rezaee,
Keywords
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- EP ID EP730698
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