Transversal Filter Operating Using Surface Acoustic Waves

摘要

A transversal filter operates using surface acoustic waves and has a piezoelectric substrate and an acoustic track that is arranged on the substrate and in which a first transducer and a second transducer are arranged. Each transducer has electrode fingers. A function, which characterizes the weighting of the overlap length of electrode fingers of different polarity in the second transducer, has a half main lobe and at least one side lobe. The amplitude of the lobes decreases monotonally in a direction that points to the first transducer.