Planar structure gain compensation type SAW device and manufacturing method therefor

The invention discloses a planar structure gain compensation type SAW device and a manufacturing method therefor. The planar structure gain compensation type SAW device comprises an input interdigital energy transducer and an output interdigital energy transducer, both of the input interdigital energy transducer and the output interdigital energy transducer are attached to a surface of piezoelectric material and are coupled to each other via surface acoustic waves, and the output interdigital energy transducer is connected to a matching compensation amplification circuit via a conductor or the input interdigital energy transducer is connected with the matching compensation amplification circuit via the conductor; a defect of large insertion loss of a surface acoustic wave filter or a surface acoustic wave resonator or a surface acoustic wave delay line of the prior art can be overcome; problems of poor consistency, repeatability and reliability and difficult debugging that are caused by traditional use of ext