Design and Development of Spiral Antenna at ISM Band for WBAN Devices

The advancement in Body Area Network (BAN) was started in 1995 for the idea of combining Wireless Personal Area Network with Wire-‎less BAN which can be implemented to communicate near and around the human body. Initially, ISM (Industrial, Scientific, and Medical) ‎band has been allocated to industries, scientific research and medical field research, but later, it has been allowed to be used in applications ‎such as Bluetooth, Wi-Fi, Cordless phone, etc. For the above-mentioned applications, the antennas such as helical antenna, microstrip or ‎dielectric patch antenna, etc., have been used. Since microstrip patch antenna are compact in size and weight, they have become dominant in ‎this field. The design of this antenna needs 36 × 28 mm³ sheet of FR-4 substrate material. The detuning impact caused by the movement and ‎posture of the body can be tolerated by a wide bandwidth of 400 MHz. The electromagnetic radiation effects on free space are investigated. ‎Radiation gain, VSWR and return loss are also measured for analyzing the antenna design and making the antenna a better component for ‎wearable devices‎.