EMITTER OF ULTRASONIC THERAPEUTIC APPARATUS

摘要

An emitter of ultrasonic therapeutic apparatus contains the piezoelectric converter. One side of the converter contacts acoustically with the skin of the patient while the opposite side contacts the air. The emitter is designed on the base of piezoelectric plate made of PZT-8 ceramics with high mechanical factor of quality (Q=1000) and coefficient of electromechanical connection (k=0.51) with one transitional aluminum layer with the thickness of b=0.54 (n=0.27) and two coupling circuits with m=0.75, m=0.79, α=0.5 added to the resistance Rγ, and factor of quality Q=1.44.