Surface acoustic waves system for communication electronic equipment, performs symmetrical-to-asymmetrical conversion and uses piezoelectric substrate and filter system

摘要

The SAW (Surface Acoustic Wave) system (200) is for use in communication electronic equipment. It may perform symmetric-to asymmetrical conversion and uses a SAW filter system (201,202) on a piezoelectric substrate. Each filter has a coupled resonator (203,204) and has interdigitating transducers (205,207) forming arrays with reflectors (208,209) at the ends. The electrodes for the transducers etc. may be made of aluminum.