SURFACE ACOUSTIC WAVE FILTER DEVICE FORMED ON A PLURALITY OF PIEZOELECTRIC SUBSTRATES

摘要

A surface acoustic wave device is disclosed for use in a communication apparatus. It has a multiple of surface acoustic wave elements (64-1 to 64-6) having different filter characteristics formed on individual piezoelectric substrates (67-1, 67-2), the different filter characteristics being synthesized to form a combined filter having a desired filter characteristic.