《3_RFID_Antenna_and_System_Design》.pdf

Radio Frequency Identification (RFID) Antenna and System Design Markus Laudien ( ANSOFT Corp) Application Engineer RFID antenna and system design Agenda Requirements of UHF-RFID systems and limitations of analytical treatment Reader antenna Transponder unit ( chip, package, antenna ) Field-Simulation of a whole transmission setup. Integration of nonlinear components into the transmission setup. Conclusions What is RFID (Radio Frequency IDentification) Wireless identifications of piece goods Reader: Communication with Tags, tracking of piece goods Frequencies of operation : status : LF: 125 kHz ; 13.56 MHz ( near field coupling ) established, mass production, short range (typ 1 m ) UHF: 433 MHz, 868 MHz, 915 MHz , 2.45 GHz market introduction, ( far field operation ) larger range ( 8m) Block diagram of an RFID transmission system antenna ASK Transponder IC RECEIVER DEMODULATOR LOGIC READER SYSTEM MEMORY PSK or TRANSMITTER (READ/WRITE)