Bluetooth Low Energy Antenna Design for Monitoring Applications

Bluetooth technology enables short range data exchange between the devices. It operates in 2.4 GHz Industrial, Scientific and Medical (ISM) band, allowing connectivity for devices such as smartphones, headphones and Internet of Things (IoT) applications. Several bluetooth antennas have been discussed previously but they come with some limitations, i.e. some are large in size, some have less bandwidth percentage and some have less gain. Therefore, small sized bluetooth antenna is proposed in the paper with 15 mm radius and 1.6 mm thickness using Roger RT duroid 5880 substrate. The proposed compact bluetooth low energy antenna possess simulated bandwidth percentage of 4.08 %, 2.03 dBi gain and 99.20 % radiation efficiency. Moreover, the simulations were done using Ansys High Frequency Structure Simulator (HFSS) software.