Handheld Large 2D Array with Azimuthal Planewave and Row-Multiplexed Elevation Beamforming Enabled by local ASIC Electronics

This project presents a methodology-oriented design and evaluation framework for a high-density, large-aperture 2-D transducer array system optimized for advanced 3-D ultrasound imaging. To overcome the physical constraints of routing 1024 individual elements (64 azimuth by 16 elevation), the proposed architecture integrates local application-specific integrated circuit (ASIC) multiplexing devices directly with the acoustic array. The system utilizes azimuthal planewave transmission combined with row-multiplexed synthetic aperture beamforming in the elevation plane to achieve high lateral and contrast resolution at depth. Local preamplifiers and buffering circuits are incorporated to mitigate signal degradation from high-impedance elements, while a local Field Programmable Gate Array (FPGA) manages digital control, timing, and synchronization. The research-backed framework

provides structural guidance for simulating and modeling the orthogonal 2-D and full 3-D beamforming algorithms. By analyzing the trade-offs between multiplexing rates, power dissipation, and penetration depth, this work establishes a robust evaluation model for next-generation handheld diagnostic imaging platforms, supporting academic research in advanced beamforming and hardware-software co-design.

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