Author(s): Karapetyan G. Ya. | Bagdasaryan A. S. | Kataev V. F. | Kataeva O. V.
Journal: Tekhnologiya i Konstruirovanie v Elektronnoi Apparature
ISSN 2225-5818
Issue: 2;
Start page: 31;
Date: 2008;
Original page
Keywords: surface acoustic waves | interdigital transducer | delay line | pressure sensors
ABSTRACT
The paper deals with sensors based on delay lines on surface acoustic waves (SAW), having a receiving-emitting and a reflective interdigital transducers (IDT). The dependence of the reflection coefficient of SAW on type and intensity of the load was studied. The authors propose a composite delay line in which the phase of the reflection coefficient depends on the pressure. Pressure leads to a shift of the reflective IDT relative to the transceiver, because they are located on different substrates. The paper also presents functional diagrams of the interrogator.
Journal: Tekhnologiya i Konstruirovanie v Elektronnoi Apparature
ISSN 2225-5818
Issue: 2;
Start page: 31;
Date: 2008;
Original page
Keywords: surface acoustic waves | interdigital transducer | delay line | pressure sensors
ABSTRACT
The paper deals with sensors based on delay lines on surface acoustic waves (SAW), having a receiving-emitting and a reflective interdigital transducers (IDT). The dependence of the reflection coefficient of SAW on type and intensity of the load was studied. The authors propose a composite delay line in which the phase of the reflection coefficient depends on the pressure. Pressure leads to a shift of the reflective IDT relative to the transceiver, because they are located on different substrates. The paper also presents functional diagrams of the interrogator.