MIMO WPT System Optimisation and Prototyping

CSEE Seminar Series

  • Wed 30 Oct 19

    15:30 - 17:30

  • Colchester Campus


  • Event speaker

    Dr Shanpu Shen

  • Event type

    Lectures, talks and seminars

  • Event organiser

    Computer Science and Electronic Engineering, School of

Wireless Power Transfer Explained

Wireless power transfer is a promising technology to overcome the issue of battery recharging and replacement in IoT. The main challenge of WPT is to improve the output DC power of the rectenna without increasing the transmit power.

In this talk, we introduce the multiple-input and multiple-output (MIMO) wireless power transfer (WPT) system so as to enhance the output DC power of the rectennas. Two combining schemes for multiple rectennas at the receiver, DC and RF combinings, are also modelled, analysed, and optimised. Two types of performance evaluations, based on the nonlinear rectenna model and based on an realistic and accurate rectenna circuit simulations, are provided to show that the output DC power can be linearly increased by using multiple rectennas at the transmitter and receiver and that RF combining outperforms DC combining in terms of the output DC power level due to the nonlinearity of the rectenna.

Preliminary prototyping of the MISO WPT system with and without cooperative transmit antennas are also introduced. It is shown that the output DC power can be effectively boosted by adapting to channel state information (CSI). Conclusions and future work will be discussed.

MIMO WPT System Optimisation and Prototyping


Dr Shanpu Shen received the bachelor’s degree in communication engineering from the Nanjing University of Science and Technology, Nanjing, China, in 2013, and the Ph.D. degree in electronic and computer engineering from The Hong Kong University of Science and Technology (HKUST), Hong Kong, in 2017. He was a Visiting Ph.D. Student with the Microsystems Technology Laboratories, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA, from 2016 to 2017. He was a Post-Doctoral Fellow with HKUST from 2017 to 2018.

He is currently a postdoctoral research associate with the Communications and Signal Processing Group (CSP), Department of Electrical and Electronic Engineering at Imperial College London. His current research interests include RF energy harvesting, wireless power transfer, multiple antenna systems, and wireless communication.