報(bào)告人簡介:

Eng-Hock LIM，馬來西亞拉曼大學(xué)（UTAR）教授，馬來西亞科學(xué)院和東盟工程技術(shù)學(xué)院院士。1997年獲國立臺(tái)灣海洋大學(xué)電機(jī)工程學(xué)士學(xué)位，2000年獲南洋理工大學(xué)電機(jī)與電子工程碩士學(xué)位，2007年獲香港城市大學(xué)電子工程博士學(xué)位。2013年至2016年期間，擔(dān)任期刊IEEE Transactions on Antennas and Propagation雜志副主編?，F(xiàn)任期刊IEEE Journal of Radio Frequency Identification副主編，IEEE馬來西亞RFID委員會(huì)創(chuàng)始主席以及IEEE RFID-S杰出講師（Distinguished Lecture）。曾于獲得自動(dòng)識(shí)別和移動(dòng)協(xié)會(huì)頒發(fā)的 Teds Williams 獎(jiǎng)。目前研究興趣包括RFID射頻設(shè)別技術(shù)、智能可重構(gòu)天線以及多功能天線。

報(bào)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.