Design and Development of Biosensor Microstrip Antenna at 2.45 GHz

Biosensors antenna can be applied to the human body such as for health monitoring, diagnosis, and treatment. This research proposes a microstrip antenna that is applied for biosensing applications. The proposed antenna operates in the Industrial Scientific Medicine (ISM) band (2.4-2.5 GHz). In this study, the antenna is designed using the proximity coupled feeding technique. The proposed antenna is designed using CST Software. The antenna was fabricated and measured using the Pocket Vector Network Analyzer (VNA) device. The antenna substrate material used is Roger 3010 with a thickness of 1.28 mm. The results of the proposed antenna simulation show that the operating frequency is 2.46 GHz, S11 is -19.76 dB, and the bandwidth is 401.2 MHz. Meanwhile, the results of the fabricated antenna measurements show the operating frequency at 2.5 GHz with an S11 of -21.55 dB. Based on the comparison graph between the simulation and the measurement results, it can be concluded that the fabricated antenna has experienced an increasing shift frequency compared to the simulation results.