A Spurious-Free 5.8 GHz Circular Patch Antenna for Rectenna Applications

KEYWORDS

In this paper, a 5.8 GHz capacitive coupled circular patch antenna having harmonic suppression capability has been designed and fabricated for wireless power transfer applications. Harmonics suppression has been achieved up to the fourth order of the fundamental operating frequency by using two stubs and one split circular slot. Such a type of simple geometry for harmonic suppression is definitely a potential advantage as compared to the earlier published similar type of work where complex geometry has been involved for harmonic suppression. Surface current distributions on the antenna have been shown at harmonic frequencies to illustrate the harmonic suppression graphically. Model equivalent circuit of the presented antenna also has been shown to explain the harmonic suppression functionality in detail. Proposed antenna has been fabricated and the simulation results are experimentally verified.

KEYWORDS:

• Circular patch antenna
• Defected ground structure (DGS)
• Filtering antenna
• Harmonic suppression
• Rectenna
• Stub

Additional information

Notes on contributors

Udayabhaskar Pattapu

Udayabhaskar Pattapu born in Kothapatnam (Andhra Pradesh), India. He received his M.Tech. in Communications and Signal Processing from Acharya Nagarjuna University, Andhra Pradesh, India, in 2009. He is currently pursuing his PhD as a Senior Research Fellow in the Department of Electronics Engineering from IIT (Indian School of Mines) Dhanbad, India. He served as a Junior Research Fellow in the Department of Electronics Engineering, IIT (Indian School of Mines) Dhanbad, India, during 2014–2016. He has a student IEEE membership and also Associate membership IETE. His research interests include Rectenna Design System for Wireless Energy Transfer/ Harvesting.

Sushrut Das

Sushrut Das received B.Sc. degree in Physics from Calcutta University, M.Sc. degree in Physics from Banaras Hindu University, M. Tech degree in Microwave from Burdwan University and PhD degree in Engineering from Indian Institute of Technology, Kharagpur, India, in the year 1999, 2001, 2003 and 2007, respectively. After that he joined IIT (ISM), Dhanbad, India, where he is currently an Assistant Professor in the Department of Electronics Engineering. He has authored one book, Microwave Engineering (Oxford University Press, 2014) and published several research papers in referred international journals and conferences. He has received URSI (International Union of Radio Science) Young Scientist Award in Istanbul, Turkey, in 2011. His research interest includes Microwave Antennas, Microwave passive structures, Wireless energy transfer and energy harvesting. Email: [email protected]