Design and implementation of SAW reader receiving circuit

Author

Zhi-xiang Gao ; Zhi-jun Chen ; Xin Huang ; Rui Tong ; Meng-yang Wang

Author_Institution

Coll. of Autom. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

fYear

2013

fDate

25-27 Oct. 2013

Firstpage

1

Lastpage

4

Abstract

Surface acoustic wave (SAW) devices find numerous applications in sensor fields, as well as in Radio Frequency Identifications (RFID). SAW RFID system works similar to conventional radar system. The reader of SAW RFID system is based on delay line device and time-domain interrogation. The SAW Reader is composed of transmitting circuit and receiving circuit. The transmission circuit sends inquiries pulse to the SAW tag, and the receiving circuit demodulates echo signal, samples and stores the demodulated signal. The receiving circuit is designed and fabricated with IQ demodulator chip, low-noise baseband amplifier, ADC driver, high-speed ADC, FPGA and SRAM. Measured results obtained by a built reader and SAW tags bonded to the antenna for an SAW RFID system are given and analyzed.

Keywords

SRAM chips; acoustic delay lines; analogue-digital conversion; demodulators; field programmable gate arrays; low noise amplifiers; radiofrequency identification; surface acoustic wave devices; time-domain analysis; ADC driver; FPGA; IQ demodulator chip; RFID system; SAW tags; SRAM; built reader; delay line device; high-speed ADC; low-noise baseband amplifier; radar system; radiofrequency identifications; reader receiving circuit; sensor fields; surface acoustic wave devices; time-domain interrogation; transmitting circuit; FPGA; IQ demodulator; SAW; high-speed ADC;

fLanguage

English

Publisher

ieee

Conference_Titel

Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2013 Symposium on

Conference_Location

Changsha

Print_ISBN

978-1-4799-3289-4

Type

conf

DOI

10.1109/SPAWDA.2013.6841095

Filename

6841095