무용성 공중 전파 활용을 위한 저전력 렉테나 설계

Abstract

Design of Low Power Rectenna Applying Ambient Radio Sources

Guen Sik Kim Advisor : Prof. Dong You Choi Ph.D. Department of Information and communications Engineering Graduate School of Chosun University

The interface components and modules used in the receiving section of sensors around the mobile electronic devices or RFID-based technologies require low voltage source for its operation. In this paper, design of low power rectenna utilizing ambient air frequency has been studied Microstrip patch antenna is an antenna fabricated on 1.6 mm thick FR4 substrate having dielectric constant of 4.7. The proposed antenna with total dimension of 36.25mm х 77mm including 210mm as the length of rectifying circuit have clamp circuit and was designed to increase the conversion efficiency. The designed antenna resonates at 2.45GHz with reflection loss of 21.58dB. The power efficiency of the antenna with center frequency of 2.45GHz are experimentally calculated for different values ​​of distance between transmit and receiving antenna ranging up to 10 mm. The final RF to DC conversion efficiency of rectenna was achieved as 55%. The antenna gain is reduced in dual-resonant and multi-frequency mode, so it is the improvement of parts of the device used in the rectifier circuit. In compact rectenna design, wireless power transmission technology is expected to be low power and low voltage in order to drive wireless applications.