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ABSTRACT
To expand the beam-width and bandwidth of high-frequency transducer, a novel piezoelectric composite spherical cap vibrator was developed. The feasibility of expanding bandwidth was verified via finite element simulation. The vibrator was prepared by cutting the piezoelectric ceramic spherical cap and filling it with polymers. The piezoelectric composite spherical cap transducer was fabricated using the prepared vibrator. Test results show that the bandwidth of the transducer is 30 kHz and the −3 dB beam width is 40°. The novel piezoelectric composite spherical cap transducer realized the goal of high-frequency broadband wide–beam transmission.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (No.61471047, 61671068, 11604363), and the Beijing College Innovation Capability Promotion Plan of Beijing Municipal Institutions (No. TJSHG201510772015). The project is also supported by The Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions (No. CIT&TCD201504053).
Funding
This work was supported by the National Natural Science Foundation of China [61471047, 61671068, 11604363]; The Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions [CIT&TCD201504053] and Beijing College Innovation Capability Promotion Plan of Beijing Municipal Institutions [TJSHG201510772015].