ABSTRACTA grating is positioned on a surface acoustic wave deviceon a first axis in-line with the delay line for substantiallyreducing the amount of energy reflected on that axis to thetransmitter and receiver. The grating sits on the first axis at aposition between the delay line and one of the edges of thedevice. The grating is comprised of a parallel series of gratingmembers each oriented so as to extend at a first angle relative tothe first axis, the grating members being generally longitudinallybisected by that axis. An optimum value for the first angle isprovided by a theoretical analysis, and experimental results arepresented. On the experimental device, the grating is defined bya series of parallel grooves formed in the surface of the device;however, the grating may also be defined by a series of metallicstrips mounted on the surface of the device.
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