| 摘要 |
This invention discloses a composite ultrasonic therapeutic transducer, which comprises a piezoelectric ceramic having a positive electrode and a negative electrode, and a metallic housing, and is characterized in that the piezoelectric ceramic is formed with at least one recess which is open to the negative electrode attached onto the metallic housing. Thus, the transducer has a higher impedance and a wider bandwidth, and is easy to reach a well impedance matching with a driver.
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