Performance Analysis of Highly Efficient Two-Port MIMO Antenna for 5G Wearable Applications

Abstract

In this paper, a compact low-profile dual-band 2 × 2 wide band wearable slot antenna (smart watch) for the frequency spectrum of 3.4–3.6 GHz (LTE Band 42) is proposed. For smart watch applications, the antenna should be as small as possible and it should be resonating at the forthcoming 5G technology. Hence, two resonant modes are achieved for each antenna by etching the T-shaped monopole slot in the ground plane of size 40 × 40 mm², and each slot is coupled fed by the L-shaped tuned stub which is printed on the 0.8 mm-thick FR4 substrate. The proposed antenna is fabricated and its performance is experimentally measured. The measured antenna parameters agree well with the simulated results. The reflection co-efficient and transmission co-efficient of the Multi Input Multi Output (MIMO) antenna are well below −10 dB throughout the band of operation. The efficiency of the MIMO antenna is achieved up to 81% with the overall gain of about 2.4 dB. To validate the proposed MIMO performance, the envelope correlation co-efficient between the antenna elements is calculated. In this paper, the effect of the proposed antenna in the human hand is also studied and discussed along with the specific absorption rate.

KEYWORDS:

• Antenna
• ECC
• Efficiency
• SAR
• Substrate
• Smart watch

Additional information

Notes on contributors

Muthumanickam Anbarasu

A Muthumanickam was born in Tamil Nadu, India, in 1979. He received BE degree in electronics and communication engineering from Mohamed Sathak Engineering College at Ramanathapuram, Madurai Kamarajar University, Tamil Nadu, India and ME degree in communication systems from KLN College of Engineering at Madurai, Anna University Chennai, Tamil Nadu, India, in 2001 and 2007, respectively. He presented 8 papers in international and 15 papers in national conferences in India. He published a book in Optical Communication Networks with ISBN No: 978-93-5104-349-2 and a book in DSP Integrated Circuits with ISBN No:979-93-5137-247-9. He is a life member of ISTE, IETE, CSI, IE(I). He attended 18 workshops and organized five programmes. His current research interest is in the areas of antennas.

Janakiraman Nithiyanantham

N Janakiraman is working as a professor in is Department of Electronics and Communication Engineering of KLN College of Engineering, Madurai. He completed his BE degree in Faculty of Electronics and Communication Engineering from Madurai Kamaraj University in the year 2003 followed by ME degree in the field of applied electronics from Anna University in the year 2005. In addition, he completed his MBA degree in the stream of human resource management from Madurai Kamaraj University in the year 2007. As a golden achievement, he completed his PhD degree in the field of embedded computing from College of Engineering Guindy, Anna University under the AICTE sponsored Quality Improvement Programme scheme in Feb 2015. He is an active executive committee member in various professional bodies like IEEE, IEI, ISTE, CSI, IETE, ORSI, CRSI, and CSTA. He has published 29 technical papers and 5 books. He has organized 20 workshops and attended more than 85 short-term programmes / workshops in his 14 years of teaching experience and 3 years of research experience. He has delivered 26 invited talks and guest lectures in various organizations and also working as consultant in 2 embedded systems based companies. Email: [email protected]