Circular Quarter-Mode SIW Antenna for WBAN Application

ABSTRACT

In this paper, a miniaturized Substrate Integrated Waveguide (SIW) antenna is designed for 5.8 GHz Wireless Body Area Network application. The proposed antenna is based on a quarter-mode concept, which is acquired by cutting a circular patch into four quarters along the perfect magnetic walls. Later on, by etching a tilted-rectangular slot on the top of a quarter-mode SIW cavity, two modes TM₂₁₀ and TM₀₂₀ get coupled and in results, an enhancement in bandwidth is achieved. The performance of the fabricated antenna has been validated on pork tissues. The measured impedance bandwidth and the radiation efficiency of the antenna are 400 MHz [5.52–5.92 GHz] and 88.5%, respectively. The evaluated value of specific absorption rate on pork tissues is 1 W/kg averaged over 1 g mass of tissue, with the input power of 250 mW. The simulation results and the measurement results examined on pork tissues agree well with each other.

KEYWORDS:

• Pork tissues
• Quarter mode substrate integrated waveguide (QMSIW)
• Specific Absorption Rate (SAR)
• Voxel body model
• Wireless body area network (WBAN)

ACKNOWLEDGEMENTS

The authors would like to express their sincere gratitude to Dr C. K. Aanandan (Prof. of the Dept. of Electronics Engineering, Cochin University of Science and Technology) for his kind approval to perform antenna measurements.

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Divya Chaturvedi

Divya Chaturvedi was born in Kanpur, India. She received her BTech degree in Electronics and Communication Engineering from UPTU, India and MTech degree in Electronics Engineering from Pondicherry University, India. She is working currently towards PhD degree in the area of Substrate Integrated Waveguide antenna for WBAN applications at NIT Tiruchirappalli. Her area of research involves SIW, MIC, metamaterial, and biological effects of radiation on the human body.

S. Raghavan

S. Raghavan has 34 years of experience in teaching and research at the National Institute of Technology, Tiruchirappalli, India as a senior professor. He received his UG degree in ECE from the College of Engineering, Guindy, PG degree in the specialization of Microwave Engineering from the College of Engineering, Trivandrum. He completed his Doctoral programme in the field of MIC from IIT Delhi, India under the guidance of Prof. Bharathi Bhat and Prof. S. K. Koul. His research interest includes microwave/millimeter-wave circuits and devices, MIC, antennas, EMI/EMC, RF/BIO MEMS, metamaterials, and microwaves in biomedical applications. He has contributed more than 100 papers in international and national journals.

E-mail: [email protected]