| 摘要 |
PURPOSE:To suppress the mutual induction between an input and an output and to increase a guaranteed attenuation, by wiring either one of connecting lines for an input or output transducer so that it crosses over a transmission line for elastic surface waves. CONSTITUTION:In an elastic surface wave device providing a pair of transducers 2, 3 on a piezoelectric substrate 1, a spatical region 9 which includes both the boundary lines of the band area consisting of a transmission line of an elastic surface wave and its extension and in which it is clipped with two planes vertical to the substrate 1 is assumed. Crossing finger electrodes 2-1, 2-2 opposed to each other of the transducer 2 are connected to terminals 13, 14 with leads 11, 12 located respectively at both sides of the region 9, and one of crossing finger electrodes 3-1, 3-2 opposed with each other of the transducer 3 is connected to a terminal 18 with a lead 16, and another is connected to a terminal 20 with a lead 19 wired crossing over the region 9. |
