Acoustic surface wave devices

摘要

A length weighted interdigital transducer has lambda /2 spaced electrodes within the overlap region. Outside the overlap region, the overlapping lambda /2 spaced electrodes are connected to the bus bars by pairs of lambda /4 spaced electrodes and extra "dummy" pairs of lambda /4 spaced electrodes are also connected to the bus bars. The lambda /2 spaced electrodes give a good manufacturing yield, and the lambda /4 spaced pairs of electrodes and pairs of dummy electrodes provide compensation for wavefront distortion combined with low "interactions.