Design on semiconductor coupled SAW convolver

This paper presents the results of a study on the design of a semiconductor coupled SAW convolver, in which bi-directionally propagating SAWs, on a high coupling coefficient piezoelectric substrate, couple with bonded semiconductor diodes through multi-strips. In order to obtain convolution signals with a high efficiency, we adopted a diode balanced bridge structure for nonlinear operation. We also used multi-strip tapping electrodes, which display robustness against operation frequency variation and temperature dependent variation on SAW delay. We verify the effectiveness of the device using circuit simulation and a basic test circuit, which was fabricated by using the epitaxial lift off film bonding process.