The passive wireless sensor on surface acoustic waves for measurement of gas and liquid environments parameters
Abstract
The passive wireless sensor on surface acoustic waves for measurement of gas and liquid environments parameters
The sensor design on surface acoustic waves (SAW), representing the delay line with unidirectional inter-digital transducers (IDT) is considered. The factor of reflection of SAW from the unidirectional IDT loaded on impedance depending on value of resistance connected to it is investigated. On dependence of factor of reflection on size of resistance there is almost linear site at values of resistance more than 50 Ohm. The new design of the connected lattices of nanowire of zinc oxide, having the general resistance in a range of 50-250 Ohm which is connected to reflective IDT as loading is developed.
Keywords: passive sensors, ZnO nanowire, surface acoustic waves, interdigital transducer.