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Low profile multi-polarization diversity UWB antenna for body centric communications

Published online by Cambridge University Press:  25 July 2022

Malathi Kanagasabai ,
Padmathilagam Sambandam Open the ORCID record for Padmathilagam Sambandam [Opens in a new window] ,
Mohammed Gulam Nabi Alsath ,
Vikneshwaran Murugesan ,
Sandeepkumar Palaniswamy  and
Arunkumar Shrivastav
Malathi Kanagasabai
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering, Guindy, Anna University, Chennai 600025, India
Padmathilagam Sambandam*
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering, Guindy, Anna University, Chennai 600025, India
Mohammed Gulam Nabi Alsath
Affiliation:
Department of Electronics and Communication Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai 603110, India
Vikneshwaran Murugesan
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering, Guindy, Anna University, Chennai 600025, India
Sandeepkumar Palaniswamy
Affiliation:
Department of Electronics and Communication Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, India
Arunkumar Shrivastav
Affiliation:
Department of Electronics and Communication Engineering, Saveetha Engineering College, Thandalam, Chennai 600056, India
*
Author for correspondence: Padmathilagam Sambandam, E-mail: padmathilagam.s@gmail.com
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Abstract

A low-profile multi-polarized MIMO ultra-wideband antenna suitable for body-centric communications is reported. MIMO configuration is achieved using the symmetric heptagonal monopole (SHM) antenna, a mirrored SHM antenna, an asymmetric ruby-shaped monopole (ARSM) antenna, and a mirrored ARSM antenna placed over the modified C-shaped ground plane (MCGP). The proposed antenna elements are designed to achieve resonance for the entire ultra-wideband frequency range. The SHM antenna is coupled with a co-planar waveguide to produce linear polarization. An ARSM antenna generates circular polarization utilizing an asymmetric geometry both in the radiator and a truncated ground plane. Both the SHM antenna and an ARSM antenna are aligned face-to-face over an MCGP plane and good isolation >15 dB is realized between the antenna elements. The gain and total efficiency for linear polarized and the circularly polarized antennas are 3.05–4.8 dBi/48–66% and from 2.8 to 5 dBic/52 to 70.5%, respectively. The specific absorption rate values are evaluated to understand their suitability for WBAN communications.

Keywords

MIMO antennapolarization diversityspecific absorption rate (SAR)ultra-wideband (UWB)
Type
Biomedical Applications
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 4 , May 2023 , pp. 560 - 571
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Copyright
© The Author(s), 2022. Published by Cambridge University Press in association with the European Microwave Association

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