Surface acoustic wave scattering grating

Details Surface acoustic wave scattering grating Surface acoustic wave scattering grating

H - Electricity

01

L

349/59.1

H01L 41/00 (2006.01) H03H 9/02 (2006.01)

Patent

CA 1299732

ABSTRACT A grating is positioned on a surface acoustic wave device on a first axis in-line with the delay line for substantially reducing the amount of energy reflected on that axis to the transmitter and receiver. The grating sits on the first axis at a position between the delay line and one of the edges of the device. The grating is comprised of a parallel series of grating members each oriented so as to extend at a first angle relative to the first axis, the grating members being generally longitudinally bisected by that axis. An optimum value for the first angle is provided by a theoretical analysis, and experimental results are presented. On the experimental device, the grating is defined by a series of parallel grooves formed in the surface of the device; however, the grating may also be defined by a series of metallic strips mounted on the surface of the device.

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