標題: Design of Miniaturized Antenna and Power Harvester Circuit on the Enucleated Porcine Eyes
作者: Cheng, Hui-Wen
Yu, Tsung-Chi
Huang, Hong-Yi
Ting, Ssu-Han
Huang, Tzuen-Hsi
Chiou, Jin-Chern
Luo, Ching-Hsing
電機工程學系
Department of Electrical and Computer Engineering
關鍵字: Contact lens;microelectromechanical systems (MEMS);radio frequency (RF);rectifying antenna (rectenna)
公開日期: 1-Jan-2014
摘要: This letter describes a prototype of a miniaturized rectifying antenna (rectenna) design for the wireless powering of an ocular device. In contrast to the conventional on-lens loop antenna, this letter presents a loop antenna with stepped structures for optimal impedance to the rectifier. The return loss of the antenna less than -15 dB at 3 GHz is accomplished in a contact lens with a diameter ranging from 10 to 15 mm. Additionally, the radio frequency (RF) rectifier and voltage-boosting network (VBN) are optimized to enhance the power conversion efficiency (PCE) by using the voltage boosting technique. Experimental results indicate that the optimal rectifier, which is fabricated with the TSMC 0.18-mu m process, produces a dc output voltage of 2.94 V and a conversion efficiency of 31% across a resistive 3.5 k Omega load with an input power of +9 dBm. Moreover, the rectenna under the experiment with an enucleated porcine eye can be powered wirelessly with a transmitting device at a distance of 4 cm. The output power is 2.01 mW with a transmitting power of +32 dBm for the wireless ocular physiological monitoring (WOPM) system. Importantly, this letter demonstrates the feasibility of an optimal miniaturized on-lens rectenna design, capable of overcoming the RF power attenuation on the ocular tissue to increase the delivering distance and reduce the transmitting power.
URI: http://dx.doi.org/10.1109/LAWP.2014.2328611
http://hdl.handle.net/11536/24972
ISSN: 1536-1225
DOI: 10.1109/LAWP.2014.2328611
期刊: IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume: 13
Issue: 
起始頁: 1156
結束頁: 1159
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