Design of Circularly Polarized Array Rectenna for the Applications of Wireless Power Transmission

• Main Authors: Yu-Yi Lee, 李育易
• Other Authors: 孫卓勳
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/9242vc

碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 99 === In this thesis, circularly polarized array rectenna for the applications of wireless power transmission has been studied. The proposed array antenna is operating at Microwave Frequency which intercepts and receives the RF energy of any polarization wave in free space. Low-pass filter, matching network and voltage-doubler rectifier are designed for impedance matching after the receiver antenna as well as to suppress the high order harmonics efficiently and minify the circuit size. It also solved the problem of traditional electric products battery charging. The technology of wireless power transmission for a rectenna by using the electromagnetic power as a charging resource, combine with the circular polarized array rectenna to achieve self-sufficiency application. The proposed design of circular polarized slot array antenna, Low-pass filter, matching network and the voltage-doubler rectifier which exhibit bandwidth and axial ratio bandwidth are following the specification of IEEE 802.11b (2.4~2.485 GHz). The result of the antenna gain is about 6~7.2 dBi. With the present design, a maximum voltage of 6.5 V and a conversion efficiency of 70 % colud be attainable.