Electrical coupling effects in an ultrasonic transducer array
Abstract
A study of mechanisms and methods of minimizing electric coupling effects in nearby transducers in an ultrasonic array is presented. Electrical leakage is an important source of coupling; a semi-empirical calculation was made to determine the coupling strength between adjacent transducers, using the experimental curves deduced from a rheographical simulation. The consequences on the radiation pattern were studied in terms of the width and depth of cuts made in the ceramic material and of the acoustical and electric matching conditions. The results define the safe cut depth, taking the geometrical parameters of the array into account, in order to obtain performance very close to that predicted from the zeroth order theory, and provide the means of reducing the coupling.
- Publication:
-
Ultrasonics
- Pub Date:
- November 1979
- Bibcode:
- 1979Ultra..17..255B
- Keywords:
-
- Cross Coupling;
- Matrices (Circuits);
- Potential Fields;
- Rheoelectrical Simulation;
- Ultrasonic Wave Transducers;
- Ceramics;
- Coupling Circuits;
- Depolarization;
- Impedance Matching;
- Piezoelectric Transducers;
- Potential Fields;
- Radiation Distribution;
- Instrumentation and Photography