Surface acoustic waver convolver

A surface acoustic wave convolver, comprising

• at least two excitation electrodes for exciting first surface acoustic waves,
• a plurality of waveguides for propagating the, first surface acoustic waves from the excitation electrodes in reverse directions to each other,
• an output electrode for detecting a second surface acoustic wave which is generated at the waveguides and propagates traversing the first surface acoustic waves to convert the second surface acoustic wave into an electric signal, and
• reflector means for reflecting the first surface acoustic waves from the excitation electrodes toward the waveguides so that reflected waves are in phase with each other, the reflector means reflecting the first surface acoustic waves away from and exterior to the reflector means,
• the excitation electrodes, the waveguides, the output electrode and the reflector means all being arranged on a piezoelectric substrate.

A surface acoustic wave convolver, comprising

• at least two excitation electrodes for exciting first surface acoustic waves,
• a plurality of waveguides for propagating the first surface acoustic waves from the excitation electrodes in reverse direction to each other,
• an output electrode for detecting a second surface acoustic wave which is generated at the waveguides and propagates traversing the first surface acoustic waves, to convert the second surface acoustic wave into an electric signal, and
• reflector means arranged between at least one excitation electrode and at least one waveguide for reflecting the first surface acoustic waves from the excitation electrodes toward each waveguide so that reflected waves are in phase with each other, the reflector means reflecting the first surface acoustic waves away from and exterior to the reflector means,
• the excitation electrodes, the waveguides, the output electrode and the reflector means all being arranged on a piezoelectric substrate.

A surface acoustic wave convolver, comprising

• at least two excitation electrodes for exciting first surface acoustic waves,
• a plurality of waveguides for propagating the first surface acoustic waves from the excitation electrodes in reverse directions to each other,
• an output electrode for detecting a second surface acoustic wave which is generated at the waveguides and propagates traversing the first surface acoustic waves to convert the second surface acoustic wave into an electric signal, and
• reflector means for reflecting the second surface acoustic wave from the waveguides toward the output electrode so that reflected waves are in phase with each other, the reflector means reflecting the second surface acoustic wave away from and exterior to the reflector means,
• the excitation electrodes, the waveguides, the output electrodes and the reflector means all being arranged on a piezoelectric substrate.