Approach for Designing Broadband Transducer Systems and Evaluation of Various Cylindrical Transducer Technologies

date February 10, 2016
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Wednesday, February 10, 2016 1:30 p.m. in ARL Conference Room 1

Dr. Corey Bachand
BTech Acoustics LLC
Barrington, Rhode Island

Underwater transducers for broadband communication rely on effective tuning and matching to a power amplifier for maximum signal bandwidth and efficiency. This analysis follows a systematic approach to design an efficient and effective broadband acoustic transmit system. Power switching (Class D) amplifiers use a variety of modulation schemes to reduce the losses incurred at the high power amplification stage. Filtering, impedance matching, and tuning are essential for efficient, high power delivery to the transducer over a broad frequency range. There are a wide variety of transduction technologies to suit the performance and cost criteria of a given application. Several cylindrical transducer designs having the different transduction elements yet the same form factor are evaluated. Construction of an equivalent electrical circuit of the fluid-loaded transducer permits full system characterization to be performed in the convenience of a laboratory on the benchtop.