| 摘要 |
PURPOSE:To avoid the effect of unnecessary waves, by taking two transducers disposed opposingly to each other sandwiching a band-shaping electrode between them as input use and connecting the two transducers in series or parallel electrically. CONSTITUTION:A multistrip coupler 8 is formed on a piezoelectric substrate 7, and two each transducers A, B, A', B' are formed by clipping this multistrip coupler 8. The transducers A, B opposed to each other sandwiching the multistrip coupler 8 between them are taken as input transducers, and electrodes 9, 10 of the two transducers A, B, are connected with a pattern 11. When an input signal is given between an electrode 12 of the input transducer A and an electrode 13 of the input transducer B, an output signal is obtained for the transducer A' from the transducer A via the multistrip coupler 8 and for the transducer B' from the transducer B via the multistrip coupler 8. |
