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ABSTRACT
UWB antennas are limited to poor gain at higher frequencies due to the presence of higher modes, especially when fed with the probe. This paper demonstrates a method to boost the peak gain of a probe-fed hexagonal UWB antenna. Artificial magnetic conductor (AMC) based reflector is introduced to the antenna that enhances boresight gain to a wider band as well as peak gain for UWB antenna. Average gain improvement is 3.74 and 5.5 dB in peak and antenna boresight, respectively. The boresight gain improves, i.e. becomes positive for around 1 GHz wider band in the presence of AMC-based reflector. The dimension of UWB antenna is 46 × 46 mm2, while with AMC reflector, the total dimension of the antenna becomes 100 × 100 mm2. The proposed antenna structure can provide directional and stable radiation pattern and suits for UWB applications.
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Abhishek Joshi
Abhishek Joshi was born in Rajasthan, India. He received Bachelor's degree in Electronics and Communication Engineering from Rajasthan Technical University, Kota, Rajasthan, India, in 2010 and Master's degree in Digital Communication from Rajasthan Technical University, Kota, Rajasthan, India, in 2013. He is currently working towards the Ph.D. degree in the Department of Electrical and Electronics Engineering, Birla Institute of Technology and Science, Pilani-Campus, Pilani, Rajasthan, India. His current research interests include different antennas design, wideband microstrip antennas for UWB applications and wireless communication, analysis of antenna with equivalent circuit models, designing the periodic structures such as AMCs, and FSSs, and antenna design with AMC surfaces.
Rahul Singhal
Rahul Singhal received his B.E. in Electronics Engineering from Nagpur University in 1999. Post graduation, he started his teaching career itself. He taught electronics engineering courses for six years in KNMIET, Modinagar. During the tenure, he joined his M.Tech in Digital Communication from Uttar Pradesh Technical University. He received his M.Tech in 2007 and soon after, he got registered in his Ph.D. at Birla Institute of Technology and Science (BITS), Pilani-Campus, Pilani, which he completed in 2013. He is now working as an Assistant Professor in Department of Electrical and Electronics Engineering, BITS, Pilani since 2013. His doctoral work lies in the area of integrated optics involving the design and technology development of various passive photonic components like optical waveguides and power splitters. His present research interest lies in area of planar antenna design and radio over fiber/FSO network for communication applications. He has authored and co-authored technical papers in various reputed international journals and conferences. He is a member of the IEEE, a fellow of the Optical Society of India and the Institution of Electronics and Telecommunication Engineers (India).