Title :
Hypersonic generator for SAW gas sensors
Author :
Pasternak, Mateusz
Author_Institution :
Mil. Univ. of Technol., Poland
Abstract :
Commercially available surface acoustic wave (SAW) sensors usually work within the frequency range from a few dozen to a few hundred MHz. It is well-known that the mass sensitivity of a SAW sensor is directly proportional to its operating frequency and many SAW sensors are mass sensitive. For this reason, designers are still looking for high frequency generators for SAW sensors. The design of a hypersonic generator with a SAW resonator is described. The circuit works stably at 4.710 GHz (29th harmonic of the loaded resonator) at the -2.35 dBm level. In the construction, distributed-parameter circuits have been applied. The generator can be used in high sensitivity SAW sensors for the detection of complex organic gases and vapours.
Keywords :
distributed parameter networks; gas sensors; microwave oscillators; nonlinear network synthesis; sensitivity; signal generators; surface acoustic wave resonators; surface acoustic wave sensors; 4.710 GHz; SAW gas sensors; SAW oscillator; SAW resonator; distributed-parameter circuits; hypersonic generator; mass sensitivity; operating frequency; organic gas detection; organic vapour detection; surface acoustic wave sensors; Acoustic sensors; Acoustic waves; Chemical sensors; Circuits; Frequency; Gas detectors; Gases; Impedance; Surface acoustic wave devices; Surface acoustic waves;
Conference_Titel :
Sensors, 2004. Proceedings of IEEE
Print_ISBN :
0-7803-8692-2
DOI :
10.1109/ICSENS.2004.1426313
