A Compact On/Off-Body Dual Band Antenna with Modified Ground for Healthcare Applications

Abstract

In this paper, a compact dual-band radiator with a modified ground structure is presented for on/off body communication. The antenna is capable of resonating in the ISM-I (2.4 GHz) and WLAN (5.15–5.85 GHz) bands. The proposed antenna consists of a novel compact ring loaded with a C-shaped radiator for dual-band operation. To improve impedance matching and shifting of the lower band at the ISM-I band, a modified ground structure is used. This suggested antenna has a small footprint of 0.24λ₀×0.22λ₀×0.016λ₀, wherever λ₀ is the free space wavelength at the lower operational frequency. The proposed antenna is parametrically studied, as well as the analysis of electric field and SAR at different positions on the arm are also carried out to check its utility for medical applications. The proposed antenna's specific absorption rate (SAR) meets IEEE standards and the prototype's measured findings validate the simulation results.

Keywords:

• Biomedical applications
• Dual-band antenna
• ISM band
• On-body antenna
• Off-body antenna
• SAR

ACKNOWLEDGEMENT

The authors would like to thank Mr. Padam Singh Saini from the Department of ECE, G. B. Pant Govt. Engineering College, Delhi, India for providing their Advance Microwave and Antenna Testing Lab for calibration and measurement purposes.

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Ankur Utsav

Ankur Utsav received the BTech degree in electronics and communication engineering from Uttar Pradesh Technical University, India, in 2014 and the ME degree from the Birla Institute of Technology, Patna, Bihar, India, in 2018. He is currently pursuing his PhD from the Department of Electronics and Communication Engineering, Birla Institute of Technology, Patna, Bihar, India. His research interest is focused on WBAN antenna design.

Ritesh Kumar Badhai

Ritesh Kumar Badhai was born in India in 1984. In 2007, he received a Bachelor of Engineering Degree in electronics and communication engineering from Rajiv Gandhi Proudyogiki Vishwavidyalaya in Bhopal, India. He received his Master of Engineering and PhD degrees in electronics and communication engineering from the Birla Institute of Technology, Mesra, Ranchi, India in 2009 and 2015, respectively. He is now an assistant professor in the Department of Electronics and Communication Engineering at the Birla Institute of Technology Off campus Patna, Bihar, India. His research interests include computational electromagnetics, biomedical antenna design, RF circuit design, and EMI/EMC. Email: [email protected]