PRACTICAL MEASUREMENTS OF SURFACE ACOUSTIC WAVE VELOCITY USING PHASE TECHNIQUE
Abstract
This paper presents practical measurements of surface acoustic wave (SAW) velocity using phase technique. The two most important practical properties relating surface wave propagation on piezoelectric substrate are the wave velocity and electromechanical coupling coefficient. The main technique for obtaining precise results of SAW velocity is based on the use of laser probe method, which is expensive and complex. The presented method using phase technique is simple and accurate. The practical measurements are applied across the usable bandwidth of the SAW devices from 30 to 40 MHz, the used SAW filters are chosen due to its operating frequencies, commercial, and have wide bandwidth. This method is applied practically for two available commercial SAW filters F1034, Toshiba product and X101 (E8335) Sanyo product both are used in IF stages in color TV. Moreover, measurements with and without deposited sample of liquid are made for both types of filters. The interpretation of the obtained results indicate that this simple method of measurement along with the preceding programs have the possibility to be used as characterization technique for loading liquid properties, which is best suitable for chemical sensors and biosensors.
Event details
- Event
- TC4 Symposium 2001
- Technical Committee
- TC4
- Place
- Lisbon, PORTUGAL
- Time
- 13 September 2001 - 14 September 2001