#Array comsol 5.1 full#

Ultrasonic transducers are based on the direct and indirect effects of piezoelectric materials to generate mechanical energy in response to electrical signals and, conversely, electrical signals in response to mechanical vibrations 1, 2, 3, 4, 5, 6.

The needle-like focused ultrasonic beam technology implemented with a piezoelectric ring array based new planar ultrasound transducer is expected to be used in high-resolution imaging devices or medical ultrasound focusing devices in the future.

#Array comsol 5.1 full#

In addition, the results of an ultrasonic-focusing performance test showed that the full width at half-maximum of the axial subwavelength focusing beam was 0.78РћВ», and the full lateral width at half-maximum of the subwavelength lateral focusing beam was 7.03РћВ» at a distance of 10.89РћВ». Subsequently, using a pulse-echo test, we found that the РІв‚¬вЂ™Р’В 6Р’В dB bandwidth of a planar ultrasonic transducer with a center frequency of 1.0Р’В MHz was 37.5%. For practical experiments, a metasurface piezoelectric ring device was fabricated using a laser ablation process. In this study, we designed and optimized a metasurface piezoelectric ring device, and using multiphysics finite element analysis, we examined the performance of a planar ultrasonic transducer consisting of this device, a matching layer, a backing layer, and housing in producing a needle-like subwavelength focusing beam in water. The development of a new ultrasonic transducer capable of improved focusing performance has become a necessity to overcome the limitations of conventional ultrasonic transducer technology.