Title :
A method to improve isolation for RFID applications
Author :
Kim, Jaekwon ; Yoon, Hyunchul ; Park, Jooyong ; Burm, Jinwook
Author_Institution :
Dept. of Electron. Eng., Sogang Univ., Seoul
Abstract :
The isolation between transmitter and receiver has been a critical problem in a pulse-modulated RFID (radio frequency identification) system where transmitter and receiver uses identical frequencies. A method using a switch, a mixer, a BPF (band-pass filter), and an additional oscillator in the transmitter is proposed to improve the isolation between transmitter and receiver in an RFID system. The proposed system up-converts the outgoing wave from a frequency different from the received signal and improves the isolation. The proposed method provided additional 20 dB improvement on the isolation
Keywords :
band-pass filters; mixers (circuits); oscillators; pulse modulation; radio receivers; radio transmitters; radiofrequency identification; switches; band-pass filter; isolation improvement; pulse-modulated RFID system; radio frequency identification; Band pass filters; Optical transmitters; Passive RFID tags; Power supplies; Radio frequency; Radio transmitters; Radiofrequency identification; Receivers; Surface acoustic waves; Switches;
Conference_Titel :
Wireless Technology, 2005. The European Conference on
Conference_Location :
Paris
Print_ISBN :
2-9600551-1-X
DOI :
10.1109/ECWT.2005.1617748
