报告人简介:

Eng-Hock LIM，马来西亚拉曼大学（UTAR）教授，马来西亚科学院和东盟工程技术学院院士。1997年获国立台湾海洋大学电机工程学士学位，2000年获南洋理工大学电机与电子工程硕士学位，2007年获香港城市大学电子工程博士学位。2013年至2016年期间，担任期刊IEEE Transactions on Antennas and Propagation杂志副主编。现任期刊IEEE Journal of Radio Frequency Identification副主编，IEEE马来西亚RFID委员会创始主席以及IEEE RFID-S杰出讲师（Distinguished Lecture）。曾于获得自动识别和移动协会颁发的 Teds Williams 奖。目前研究兴趣包括RFID射频设别技术、智能可重构天线以及多功能天线。

报告摘要：

The Ionic Polymer-Metal Composite (IPMC) is a promising soft actuator, and it has received attention due to its remarkable high-strain electro-mechanical performance under low stimulated voltage and ability to operate in aqueous environment. Two projects will be shared in this webinar to demonstrate the application of IPMC for antenna design. First, the IPMC actuator has been integrated with an UHF RFID tag antenna for frequency tuning and reconfiguration. Here, the IPMC actuator itself is forming a movable flap that can be used for reconfiguring the resonant frequency of the tag antenna effectively. The IPMC flap can be easily deflected in two directions, either up or down, enabling a two-degree of frequency tuning. The IPMC actuator requires very low power as the deformation of the IPMC will stay even after the DC bias is removed. Simulations and experiments have been conducted to verify the design concept. The functionalities of the fabricated prototype were also tested inside an anechoic chamber as well as using a portable commercial RFID reader. Apart from the RFID application, this webinar will further explore the possibility of powering the IPMC actuator in a wireless manner for implantable drug delivery device. The IPMC actuator can be activated through magnetic resonant coupling when the frequency of an external field is tuned to match with the resonant frequency of the antenna of the planar receiver. Under wireless activation, the IPMC actuator unseals the reservoir to initiate drug releases from the developed drug delivery device to the aqueous surrounding. Experimental results show a successful release of the fluorescein dye from the 0.072 ml reservoir by wirelessly activating the actuator with the RF power of 0.65 W. In vitro study was further performed by wireless releases of tetracycline hydrochloride to an Escherichia-coli (E. coli) suspension. The reduction of E. coli colony formation from 89 × 106 CFU ml-1 to 35 × 106 CFU ml-1 shows that proof of concept on wireless drug delivery was successfully demonstrated.