| http://www.w3.org/ns/prov#value | - R0, Ri1 and Ri2, N input interdigital transducers Mi (i=1, 2, . . . , N) in place of the interdigital transducers Ti formed on the upper end surface of the piezoelectric substrate PT, N earth electrodes Gi (i=1, 2, . . . , N) formed on the lower end surface of the piezoelectric substrate PT and corresponding with the interdigital transducers Mi, respectively, and a phase shifter S including at lea
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