| 摘要 |
An elastic surface wave device comprises a main elastic surface wave filter (F1) formed on a piezoelectric substrate (11) made of monocrystalline lithium tetraborate and an auxiliary elastic surface wave filter (F2) formed on said piezoelectric substrate (11) and connected in parallel with the main elastic surface wave filter (F1) to cancel the higher frequency side unnecessary component attributable to the bulk wave contained in the output of the main elastic surface wave filter (F1). <IMAGE> |
