Design of Power Amplifier and Antenna for Power Transmission at RF-ID
RF-ID에서 전력전송을 위한 전력증폭기와 송수신 Antenna 설계
- Yim Sang-Wook (Dept. of Electrical Engineering, Chungnam National University) ;
- Kim Yong-Sang (Dept. of Electrical Engineering, Chungnam National University) ;
- Kim Yang-Mo (Dept. of Electrical Engineering, Chungnam National University)
- Published : 2004.07.14
RF-ID system is one of the very interesting field not only in a technical and economical point of view but also that people are still trying to realize lossless power transmission. This paper has a purpose on the efficient power transmission at the passive type IDcard by using wireless power transmission system. The most difficult but important part of the passive type RF-ID system is building the system that supplies power from Reader-antenna to IDcard-antenna. To check what is the most efficient way to deliver power depending on what kind of specifications of the power-amp in reader, antenna and antenna in IDcard is for operating IDcard circuit efficiently receiving the power from reader-antenna. For this, we used 125kHz sinewave for RF signal as a basic specification, OP-amp for amplifying signal and power-amp for amplifying power, loop type antenna.