Design and Analyses of Planar Antenna for Bluetooth based IoT Applications

Bluetooth is the most preferred wireless technology for low-power, short-range Internet of Things (IoT) applications. Bluetooth-based IoT devices being smaller in size, require compact antennas. In this regard, various 2.45 GHz antennas have been proposed in the literature; however, they possess certain limitations, for instance, large size, difficult to fabricate, and costly. Hence, in order to address these concerns, a compact and modified Meandered Inverted F Antenna (MIFA) is proposed in this paper. The proposed antenna possesses a simulated bandwidth percentage of 8.09 %, 1.61 dBi gain, 91.07 % radiation efficiency, and an omnidirectional radiation pattern at 2.45 GHz. Additionally, a comparative analysis between the simple inverted F antenna and the proposed compact and modified meandered inverted F antenna has been made for the improved performance evaluation of the proposed antenna. The proposed antenna design is fabricated on an FR4 substrate with 35 mm x 35 mm x 1.6 mm dimensions and is simulated on Ansys Electronics Desktop 2021R1. Also, numerous experiments have been performed in real-time to validate the proposed design.