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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hui-Wen Cheng Tsung-Chi Yu Hong-Yi Huang Ssu-Han Ting Tzuen-Hsi Huang Jin-Chern Chiou Ching-Hsing Luo |
| Copyright Year | 2002 |
| Abstract | 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- μm process, produces a dc output voltage of 2.94 V and a conversion efficiency of 31% across a resistive 3.5 k Ω 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. |
| Sponsorship | IEEE Antennas and Propagation Society |
| Starting Page | 1156 |
| Ending Page | 1159 |
| Page Count | 4 |
| File Size | 784473 |
| File Format | |
| ISSN | 15361225 |
| Volume Number | 13 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-01-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Application specific integrated circuits Lenses Antenna measurements Rectifiers Dipole antennas Rectennas rectifying antenna (rectenna) Contact lens microelectromechanical systems (MEMS) radio frequency (RF) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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