The wearable antenna for wireless body area network is trending in recent time. The demand for lightweight wearable antennas for body area networks is growing every day, as an antenna is one of the most vital parts of a wireless body area network. By putting numerous devices on the human body, WBAN has developed communication between them. Different types of miniaturized microstrip patch antennas play a different important role. This paper presents a small-sized, low-profile, and flexible antenna using FR-4 material as the substrate. An antenna's substrate has an impact on its properties. The proposed antenna operates at a 2.4 GHz frequency and has a return loss of less than -10 dB. The proposed antenna is intended to achieve a low human body SAR model and is recommended for continuous monitoring of important human signals such as blood pressure, heart rate, and body temperature via a wireless body area network. The results of the simulation show that the antenna has 2.2 dB gain, 5.4 directivity, -46.05 dB return loss, 95.8 MHz Bandwidth. This antenna is appropriate for WBAN applications because of its low profile, small size, and low price. The parameters such as VSWR, return loss, directivity, and gain of U shape slotted antenna are analyzed using CST software. This flexible and compact antenna is more suitable for various applications, specifically for wireless body area network applications.
Microstrip Patch Antenna, SAR, Wireless body area network, Wearable Antenna, FR-4 Substrate