Frequency Band Broadening of Piezoelectric Ultrasonic Transducer Using Multifrequency Impedance Network Coupling Method

Micromachined piezoelectric ultrasonic transducer with ultra-wide frequency bandwidth

A New Method of Designing Electrical Impedance Matching Network for Piezoelectric Ultrasound Transducer

A new method that is based on genetic algorithm (GA) is developed to design electrical impedance matching network for broadband piezoelectric ultrasound transducer. The new method can both optimize the topology of the matching network and perform optimization on the components at the same time. Results of classical algorithms are referenced to reduce the number of candidate topologies and great...

Horn-Type Piezoelectric Ultrasonic Transducer: Modelling and Applications

1-3 Piezoelectric Composites for High Power Ultrasonic Transducer Applications

In this paper, we demonstrated that 1-3 PZT/polymer composites, fabricated using PZT-4 ceramic and a polymer possessing a high glass transition temperature and low loss, can be used as high power ultrasonic transducer materials for high intensity focused ultrasound (HIFU) applications. The mechanical quality factor of the 1-3 composite with 64% ceramic volume fraction is over 200. The dielectri...

A Tri-band Impedance Transformer Using Stubbed Coupling Line

In this paper, a compact tri-band impedance transformer by utilizing stubbed coupling line for matching a load at three arbitrary frequencies is proposed. The transformer is composed of two parts, and each part is constructed from parallel-coupled transmission lines. Two structures with different configurations of the proposed transformer have been given and analyzed. Then, the close-form equat...