Sazzadur Chowdhury

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A highly accurate mathematical method has been presented for analytical characterization of capacitive micromachined ultrasonic transducers (CMUTs) built with square diaphragms. The method uses a new two-dimensional polynomial function to more accurately predict the deflection curve of a multilayer square diaphragm subject to both mechanical and(More)
Design of a discretized hyperbolic paraboloid geometry beamforming array of capacitive micromachined ultrasonic transducers (CMUT) has been presented. The array can intrinsically provide a broadband constant beamwidth beamforming capability without any microelectronic signal processing. A mathematical model has been developed and verified to characterize(More)
A MEMS-based axial flux power generator has been developed for use in implantable biomedical devices, such as cardiac pacemakers, hearing aid instruments, etc. The microgenerator can provide a greater energy supply per unit volume at a much smaller size and weight compared to conventional batteries. The device operates on the principle of electromagnetic(More)