Abstract
The bandwidths of capacitive micromachined ultrasonic transducers (CMUTs) affect the resolution of the ultrasound image. This paper analyzes the factors affecting the bandwidth, defines the form of the gain bandwidth product, and studies the maximum condition of the performance metric. Using MATLAB simulation calculation, the parameters of the CMUT bandwidth and gain bandwidth are simulated in transmit and receive modes. The influence of the product provides a theoretical basis for further design of the composite CMUT, increasing the bandwidth and thus improving the resolution of the ultrasound image.
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