BAIDENGER AGYEKUM TWUMASI （PhD candidate）
ABSTRACT:
The quest for flexibility and demand for power to drive electric devices has been on the increase in recent times with the increase in the number of mobile devices and electric vehicles in use, hence the need for the wireless transmission of power to such devices. The need for precise imaging and localization in medicine and radio over fibre applications in dangerous environments calls for novelty in such applications with EM-TR. This technique will provide convenience and better user experience in such applications.
Recently, wireless charging is rapidly evolving from theories towards standards, and are being adopted in commercial products, especially mobile phones, electric vehicles and other portable electronic devices.
Wireless power transfer (WPT) skills have been extensively used in many areas, e.g, the charging of electric toothbrush, mobile phones, and electric vehicles and this research seeks to extend this use case with electromagnetic time reversal technique to other applications since there are lots of limitations with current magnetic induction methods.
Time reversal is a general strategy in wave propagation in inhomogeneous media when a flag is recorded at purposes of a gadget called time reversal mirror, gets time switched and emanated back in the medium. The subsequent field has a property of refocusing. Time reversal has been extensively reported in acoustics.
In summary, the Electromagnetic Time Reversal (TR) technique is based on the time invariance property of electromagnetic waves. In line with this, this research seeks to explore the wireless transmission of power to portable electronic devices, electric vehicles and other electronic devices needing power using this property of electromagnetic waves propagation. This work will also extend this technique to medical imaging and localization applications.
Overall emphasis will be on how to improve the charging efficiency for wireless charging applications, how to increase the action distance in wireless power transfer, how to reduce the charging time for electric vehicles (EVs) and mobile phones with wireless power transfer and finally how to enhance detection and localization in medical imaging applications with EM-TR.
PRESENTER: BAIDENGER AGYEKUM TWUMASI， PhD candidate of the School of Physical Electronics（DISCIPLINE: ELECTRONIC SCIENCE AND TECHNOLOGY）
SUPERVISOR: PROF. LI JIALIN
Date: 6th July, 2017
Time: 10:30 am
Venue: Room 707, School of Physical Electronics
