Acoustic wave filter with filter-shaping element and method

A method for making acoustic wave filter, said method comprising:

• providing a substrate for supporting propagation of acoustic waves;
• disposing a first acoustic wave transducer on said substrate, said step of disposing said first acoustic wave transducer including steps of disposing at least one bus bar and electrically coupling said at least one bus bar to a first electrical port of said acoustic wave filter;
• disposing a second acoustic wave transducer on said substrate in line with said first acoustic wave transducer and acoustically coupled thereto, said step of disposing said second acoustic wave transducer including steps of disposing at least one bus bar and electrically coupling said at least one bus bar to a second electrical port of said acoustic wave filter;
• and
• disposing a third acoustic wave transducer on said substrate, said step of disposing said third acoustic wave transducer including steps of disposing at least one bus bar and electrically coupling said at least one bus bar to said first electrical port, wherein said third acoustic wave transducer is acoustically decoupled from said first acoustic wave transducer and said second acoustic wave transducer, wherein said steps of disposing first and second acoustic wave transducers include steps of disposing electrodes having a periodicity different from electrodes comprising said third acoustic wave transducer.

An acoustic wave filter comprising:

• a substrate for supporting propagation of acoustic waves;
• a first acoustic wave transducer disposed on said substrate, said first acoustic wave transducer including at least one bus bar electrically coupled to a first electrical port of said acoustic wave filter;
• and
• another acoustic wave transducer disposed on said substrate, said another acoustic wave transducer including at least one bus bar electrically coupled to said first electrical port, said another acoustic wave transducer acoustically decoupled from said first acoustic wave transducer, wherein a first periodicity of interleaved electrodes comprising said first acoustic wave transducer and a second periodicity of interleaved electrodes comprising said second acoustic wave transducer each differ from another periodicity of electrodes comprising said another acoustic wave transducer.