| 摘要 |
<p>Input (10) and output (12) transducers are aligned with respect to a dispersive reflective array so that the angle of incidence (P) of a SAW from the input transducer (10) is approximately equal to the angle of reflection (Q) from the reflective array over the entire range of the dispersive array, wherein the transducers are constructed to provide a frequency response which is matched to the periodicity of the dispersive array. …<??>Such design may be accomplished by forming the transducers with hyperbolically curved electrode fingers (13). The transducers may consist of relatively narrower inner electrode fingers and relatively wider outer electrode fingers. The transducers may also be divided into a plurality of tracks (A, B) with each of the tracks being subdivided into a plurality of subtransducer elements which are capacitively coupled in electrical series.</p> |
