Sensitivity Study of Slotted Radiator Antenna-Based Sensor for Sweat Monitoring

Analysis of sweat has grown rapidly for early diagnosis and monitoring applications in healthcare system. This paper presents a simple, economical, non-invasive slotted radiator microstrip antenna-based sensor for sweat monitoring with operating frequency of 2.4 GHz. The antenna-based sensor is designed in three different geometrically shape slotted radiator of copper patch on paper substrate. For sensitivity performance, the fabricated antenna-based sensor is tested with Sodium Chloride (NaCl) as artificial sweat solution. The variation of magnitude of reflection coefficient represented as S11 and shift in resonant frequency is observed. Square slotted radiator antenna-based sensor with the larger frequency shift of 0.17 GHz demonstrates better sensitivity performance compared to other antenna design.