Wearable Electromagnetic Sensor for Potassium Monitoring

This paper presents a wearable potassium sensors based on a flexible electromagnetic filter. The filter design includes four supershaped double split ring resonators optimized for operating at 3.5 GHz. The RT/duroid®6202 dielectric substrates was selected for its flexibility and durability against wear and abrasion. The resonators were embedded to reduce their footprint and increase sensitivity, especially near the operating frequency. A parametric analysis was conducted to identify the optimal shape and geometrical parameters for the resonators improving sensing capabilities. The sensor performance was investigated under normal and critical conditions achieved through a shaped profile.