Abstract
This paper presents a microstrip antenna-based sensor for detecting lead in water. The proposed antenna consists of a simple rectangular patch with inset feeding with an overall size of 50 mm × 45 mm. CST Studio Suite and COMSOL Multiphysics are used to simulate the characteristics of the antenna and analyze the reflection coefficients in different environment conditions. It can achieve a 10 dB reflection coefficient with VSWR <2 at 2.4 GHz. Results show that the reflection coefficient decreases with the increment of lead contents in the solution from 0.1 mg/L to 0.5 mg/L. With the salient antenna performances, the sensor demonstrates good sensitivity to detect lead content in water and upload the data using IoT analytic platform which is called ThingSpeak for data monitoring purpose. The proposed design is suitable to be used in IoT smart water quality monitoring system for lead detection as well as other heavy metal detection in water.
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