| 摘要 |
<p>A dispersive acoustic delay line using reflection on slanted gratings is provided. This device comprises slanting input and output transducers each formed of pair electrode fingers. The interval of the electrodes of different polarity varying from nv/2fmin to nv/2fmax, where v is the speed of the waves, fmin and fmax the endmost frequencies of the frequency band and n the number of the harmonic on which the transducers operate. The interval of the gratings varies from kv/fmin to kv/fmax, where k is the number of the operating harmonic of the network, with n NOTEQUAL k.</p> |
