A Triangular-shaped Quarter-mode Substrate Integrated Waveguide based Antenna for WBAN Applications

Divya Chaturvedi; S. Raghavan

doi:10.14429/dsj.68.11833

Divya Chaturvedi Department of Electronics and Communication Engineering, National Institute of Technology, Tiruchirappalli - 620 015
S. Raghavan Department of Electronics and Communication Engineering, National Institute of Technology, Tiruchirappalli - 620 015

DOI: https://doi.org/10.14429/dsj.68.11833

Keywords: Circularly polarised antenna, Off-body communication, Quarter mode substrate integrated waveguide, Wireless body area network

Abstract

In this study, a compact quarter-mode substrate integrated waveguide (QMSIW) based dual-band antenna is proposed for wireless body area network applications. A QMSIW resonator is realised by splitting the full-mode substrate integrated waveguide cavity along the perfect magnetic conductor walls. The proposed antenna preserves the fundamental mode TE110 and the third order mode TE220 of the square SIW cavity. The proposed antenna is linearly polarised in the lower band at 2.45 GHz and circularly polarised in the higher frequency band at 5.8 GHz. The on-body performance of the antenna is validated on a piece of pork muscle tissue and it has been found to be stable with respect to surroundings. The proposed antenna covers the ISM bands 44 MHz (2.445 GHz - 2.489 GHz) and 225 MHz (5.730 GHz - 5.955 GHz) at 2.45 GHz and 5.8 GHz, respectively. The measured gain of the antenna on pork tissue is 1.87 dBi and 5.5 dBi at two bands. In addition, the specific absorption rate is obtained of 0.65 mW/g and 1.51 mW/g at two bands (wext = 2 mm), averaged over 1 g of muscle with 100mW input power. Moreover, the simulated and experimental results demonstrate a good agreement.

Author Biographies

Divya Chaturvedi, Department of Electronics and Communication Engineering, National Institute of Technology, Tiruchirappalli - 620 015

Ms Divya Chaturvedi received her BTech (Electronics and Communication Engineering) from Uttar Pradesh Technical University, India and MTech (Electronics Engineering) from Pondicherry Central University, India. Currently pursuing her PhD at National Institute of Technology, Tiruchirappalli. Her area of research involves : Substrate integrated waveguide, microwave integrated circuits, metamaterial and biological effects of radiation on human body.

S. Raghavan, Department of Electronics and Communication Engineering, National Institute of Technology, Tiruchirappalli - 620 015

Dr S. Raghavan received his BE (ECE) from College of Engineering, Guindy, and ME (Microwave Engineering) from College of Engineering, Trivandrum. He received his PhD from IIT Delhi, India. Currently working as Senior Professor at National Institute of Technology, Tiruchirappalli, India. His research interest includes : Microwave/millimeter-wave circuits and devices, microwave integrated circuits, antennas, EMI/EMC, computational Electromagnetics, RF/BIO MEMS, Metamaterials and microwaves in biomedical applications. He has contributed more than 100 papers in journals and 200 papers in conferences proceedings.