Title :
A remote wireless identification system based on passive surface acoustic wave (SAW) devices
Author :
Shujian, Li ; Lin, Ma ; Danzhi, Wadg
Author_Institution :
Sch. of Electr. & Inf. Eng., Beijing Univ. of Aeronaut. & Astronaut., China
Abstract :
A wireless identification system, based on passive surface acoustic wave (SAW) devices, is presented in this paper. Because the system operates at 915 MHz center frequency, we employ a pair of SAW dispersive delay lines to expand and compress the signal. Using this method, we can enhance the processing gain and filter the noise out of the bandwidth. Thus, we can decrease the demands of the receiver sensitivity and improve the system´s performance in rejecting interference signals. The testing results show that the maximum readout distance of the interrogator is 20 m.
Keywords :
compandors; interdigital transducers; radiofrequency identification; surface acoustic wave delay lines; 165 MHz; 20 m; 915 MHz; RFID; SAW dispersive delay lines; interdigital transducer; interference rejection; interrogator maximum readout distance; passive surface acoustic wave devices; receiver sensitivity; remote wireless identification system; signal compressor; signal expander; Acoustic noise; Acoustic waves; Band pass filters; Bandwidth; Delay lines; Dispersion; Frequency; Surface acoustic wave devices; Surface acoustic waves; System performance;
Conference_Titel :
Communications, Circuits and Systems, 2005. Proceedings. 2005 International Conference on
Print_ISBN :
0-7803-9015-6
DOI :
10.1109/ICCCAS.2005.1495301
