Wearable BLE Wireless Sensor Based on U-Shaped EBG Monopole Antenna

In this paper, a compact wearable U-shaped monopole antenna operating at 2.4 GHz frequency band is proposed for Medical Body Area Network applications. The has size of 0.37 ? × 0.31 , covering from 2.14 to 3.03 with gain 2.3 dBi 2.45 GHz, and an efficiency 93% in free space. addition, Electromagnetic Band Gap (EBG) metamaterial utilized isolate the integrated on circuit body, reducing Specific Absorption Rate (SAR). consequence, employing EBG ground plane provides safe value SAR (0.68 W/kg) when it attached human arm followed by 74% reduction compared without (2.57 W/kg). Furthermore, on-body EBG-based improved 54% 73.68%. Finally, experimental results heart rate blood oxygen level BLE sensor based exhibit average power consumption 108 mW, sensitivity -74 dBm, maximum Bluetooth Low Energy (BLE) transmission distance mobile phone 16 m complex environment.