15 October 2012 A SAW oscillator designed for sensor application
Author Affiliations +
Abstract
Dual channel surface acoustic wave (SAW) oscillators of two-port SAW resonators were designed for sensor application. A feedback loop were determined by measuring the corresponding open loop and adjusting the point of 0° total phase to exist near to the point of peak gain by variation of coupling inductance value. Two such feedback loops, a mixer and a TTL invertor comprise a dual channel SAW sensor oscillator. To achieve a stable oscillation, incorporation of a power conditioning components and the use of microstrip techniques (50 Ω characteristic impedance and the least inductance path for RF return currents) are necessary. The standard deviation of difference frequency stability of the oscillator of 433.92 MHz is about 3.92. Finally, the dual channel SAW sensor oscillator is used to detect dimehylmethylphosphonate (DMMP) vapor.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jia Hu, Jia Hu, Xiaosong Du, Xiaosong Du, Chuan Li, Chuan Li, Yadong Jiang, Yadong Jiang, "A SAW oscillator designed for sensor application", Proc. SPIE 8419, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing, Imaging, and Solar Energy, 841934 (15 October 2012); doi: 10.1117/12.976307; https://doi.org/10.1117/12.976307
PROCEEDINGS
5 PAGES


SHARE
Back to Top