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Abstract
In this paper, we present a rigorous optimization method to design a wireless power transmission (WPT) system. In order to enhance the power received by the receiver, parasitic components are integrated into the system. Our analysis shows that a system with square parasitic wire actually gives better performance than its circular counterpart. From our results, it can be seen that the presence of square parasitic wires in the system improves considerably the efficiencies, as well as the distance of effective power transfer. By implementing two square parasitic wires and using an optimization algorithm to carefully select the positions of the receiving antennas, we show that power coupled to one receiver can be significantly enhanced; while the other suppressed – the peak power at the receiving antenna is improved to 15.7% and the power detected by the adjacent antenna is minimized to as low as 2.6%. This result is important as it shows that the parasitic components do not only enhance the power coupled to the receiving antenna, it also effectively reduces crosstalk in adjacent antennas. Indeed, it can be observed that the peak efficiency obtained using two parasitic wires (with the transmitter sandwiched in between the two wires) is almost twice of that using a single wire.
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Notes on contributors
Kim Ho Yeap
Kim Ho Yeap was born in Perak, Malaysia. He received his BEng (Hons) electrical and electronics engineering from Petronas, University of Technology in 2004, MSc microelectronics from National University of Malaysia in 2005 and PhD in engineering from Tunku Abdul Rahman University in 2011. He is currently an Associate Professor in Tunku Abdul Rahman University. His research interests include wireless power transmission, waveguiding structures and THz optics.
Agnes Ruey Chyi Cheah
Agnes Ruey Chyi Cheah was born in Penang, Malaysia. She received her Bachelor of Engineering (Hons) electronic engineering from Universiti Tunku Abdul Rahman (UTAR), Kampar, Perak. She is currently pursuing her Master of Engineering Science (MEngSC) at UTAR as well. E-mail: [email protected]
Kee Choon Yeong
Kee Choon Yeong was born in Perak, Malaysia on July 18, 1964. He received his BSc from National University of Singapore in 1987, MSc from Bowling Green State University in 1991, and PhD from Rensselaer Polytechnic Institute in 1995. He is currently an Associate Professor in Tunku Abdul Rahman University. His research interests include electromagnetic waves and optics. E-mail: [email protected]
Takefumi Hiraguri
Takefumi Hiraguri received the ME and PhD from the University of Tsukuba, Ibaraki, Japan, in 1999 and 2008, respectively. In 1999, he joined the NTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation in Japan. He has been engaged in research and development of MAC protocol for the high speed and the high communication quality in wireless systems. He is now an Associate Professor in Nippon Institute of Technology. He is a member of IEEE. E-mail: [email protected]
Shunya Yokoyama
Shunya Yokoyama received the BE degree from faculty of engineering in Nippon Institute of Technology in 2014. His research interest is antenna and propagation on sensor network systems. E-mail: [email protected]
Isamu Shitara
Isamu Shitara received the BE degree from faculty of engineering in Nippon Institute of Technology in 2014. He is currently studying ME degree at Graduate School of Electronics, Information and Media Engineering in Nippon Institute of Technology. His research interest is access control scheme on wireless LAN. E-mail: [email protected]
Kazuhiro Hirasawa
Kazuhiro Hirasawa was born in Tochigi, Japan. He received his PhD in electrical engineering from Syracuse University, Syracuse, NY, USA in 1971. He is currently an Emeritus Professor in University of Tsukuba, Tsukuba, Japan and an International Collaborative Partner in Tunku Abdul Rahman University. His research interests include wireless power transmission, mobile antennas and adaptive arrays. E-mail: [email protected]
Ryoji Wakabayashi
Ryoji Wakabayashi was born in Osaka, Japan. He received his BEng from Sophia University in 1987, MEng from Sophia University in 1989 and PhD in Engineering from Tsukuba University in 1999. He is currently a Professor in Tokyo Metropolitan College of Industrial Technology. His research interests include meteor burst communication. E-mail: [email protected]