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A Highly Miniaturized Ultra-Wideband Antenna with a Triple-Band Notch for Wearable Applications

M.A. A. Rashid 1, S. M. Shah 2, H. A. Majid 2, A. Ponniran 1, and F. Hassan3
1. Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, Johor, Malaysia
2. Research Center for Applied Electromagnetics, Universiti Tun Hussein Onn Malaysia, Johor, Malaysia
3. School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Malaysia

Abstract—In this paper, a compact UWB antenna with a triple-band notch for wearable applications is designed and simulated for Ultra-Wideband (UWB) applications with the operating frequency from 3.1GHz to 10.6GHz. The antenna can be used for UWB applications, while at the same time, is able to reject the narrowbands namely, WiMAX (3.2GHz to 3.6GHz), C-band (3.7GHz to 4.2GHz) and WLAN (5.15 GHz to 5.35GHz). Two slots are introduced on the radiating patch of the antenna to notch the three narrowbands, instead of three slots to notch each narrowband. The antenna is designed on a semi-flexible Rogers Duroid RO3003TM substrate. The final outcomes indicate that the antenna can operate over the UWB frequency from 3.09 GHz to 11.09GHz. The antenna is able to notch the WiMAX and C-bands with a frequency range from 3.16GHz to 4.20 GHz and the WLAN band with a frequency range from 5.14 GHz to 5.34GHz. The performance of the antenna in bending condition is also examined with the antenna bent over a varying diameter of vacuum cylinder starting from 50mm, 80mm and 100mm. It is shown from the reflection coefficient of each diameter that the performance of the antenna is not affected by bending and thus, is particularly useful to be worn on body for wearable applications, other than its compact size of 19mm×14mm. The SAR results obtained shows that the antenna obeys the guidelines for 1mW of input power.
 
Index Terms—Bandwidth, bending investigation, electromagnetic, ultra-wideband, wearable antenna, wireless local area network, worldwide interoperability for microwave access

Cite: M.A. A. Rashid, S. M. Shah, H. A. Majid, A. Ponniran, and F. Hassan, "A Highly Miniaturized Ultra-Wideband Antenna with a Triple-Band Notch for Wearable Applications," International Journal of Electrical and Electronic Engineering & Telecommunications