FIELD: acoustoelectronics. SUBSTANCE: piezoelectric substrate 1 mounts input and output interdigital transducers 2 and 3, respectively with screen 4 in the form of metal film placed inbetween. Acoustic-wave absorber 5 is applied between ends of substrate 1 and interdigital transducers 2,3 to suppress waves reflected from substrate edges. Distance between centers of interdigital transducers 2 and 3 is selected from condition given in description of invention. EFFECT: reduced level of stray signals at desired rejection frequencies; improved output and quality of serviceable products. 2 dwg
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