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Wireless Communications and Mobile Computing
Volume 2018, Article ID 2179571, 9 pages
https://doi.org/10.1155/2018/2179571
Research Article

A Novel Dual Ultrawideband CPW-Fed Printed Antenna for Internet of Things (IoT) Applications

1Department of Optoelectronic Engineering, Chongqing University, Chongqing, China
2Department of Electrical Engineering, Faculty of Engineering, Islamic University of Madinah, Al-Madinah, Saudi Arabia
3National University of Sciences and Technology (NUST), Islamabad, Pakistan
4Department of Computer Science and Technology, University of Bedfordshire, Luton, UK

Correspondence should be addressed to Hassan Tariq Chattha; moc.liamtoh@34ahttahc

Received 30 November 2017; Accepted 12 February 2018; Published 28 March 2018

Academic Editor: Luca Reggiani

Copyright © 2018 Qasim Awais et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a dual-band coplanar waveguide (CPW) fed printed antenna with rectangular shape design blocks having ultrawideband characteristics, proposed and implemented on an FR4 substrate. The size of the proposed antenna is just 25 mm × 35 mm. A novel rounded corners technique is used to enhance not only the impedance bandwidth but also the gain of the antenna. The proposed antenna design covers two ultrawide bands which include 1.1–2.7 GHz and 3.15–3.65 GHz, thus covering 2.4 GHz Bluetooth/Wi-Fi band and most of the bands of 3G, 4G, and a future expected 5G band, that is, 3.4–3.6 GHz. Being a very low-profile antenna makes it very suitable for the future 5G Internet of Things (IoT) portable applications. A step-by-step design process is carried out to obtain an optimized design for good impedance matching in the two bands. The current densities and the reflection coefficients at different stages of the design process are plotted and discussed to get a good insight into the final proposed antenna design. This antenna exhibits stable radiation patterns on both planes, having low cross polarization and low back lobes with a maximum gain of 8.9 dB. The measurements are found to be in good accordance with the simulated results.