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Ultrasonic Transducers in Next-Generation Application

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Acoustics and Vibrations".

Deadline for manuscript submissions: 20 December 2025 | Viewed by 4023

Special Issue Editor


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Guest Editor
Department of Advanced Automotive Engineering, Sun Moon University, Asan-si 31460, Republic of Korea
Interests: ultrasonic transducers; automotive semiconductor; sensor semiconductor
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Ultrasonic technology is used in sensing and communication with ultrasonic signals, and the range of its application is expanding further still with high-resolution capabilities. Ultrasonic transducers, which are devices that generate ultrasonic waves, are being applied in various fields such as medicine, the automotive industry, and for engineering sensors. Depending on the application, the technology is implemented in various ways—such as mechanical processes and semiconductor processes—and, structurally, it is made in various ways, depending on the shape, signal mode (e.g., piezoelectric or capacitive micromachined ultrasonic transducers—CMUTs), and number of arrays.

In this Special Issue, we invite all the original research and review papers to discuss next-generation ultrasonic transducer technology along with various recent developments related to the design, manufacture, materials, signal, interface electronics, platform, reliability, and applications of ultrasonic transducers.

Dr. Inn-Yeal Oh
Guest Editor

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Keywords

  • sensor
  • communication
  • piezoelectric
  • MEMS
  • CMUT
  • PMUT
  • array
  • beam focusing

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Published Papers (1 paper)

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Review

17 pages, 2028 KB  
Review
CMOS-Compatible Ultrasonic 3D Beamforming Sensor System for Automotive Applications
by Khurshid Hussain, Wanhae Jeon, Yongmin Lee, In-Hyouk Song and Inn-Yeal Oh
Appl. Sci. 2025, 15(16), 9201; https://doi.org/10.3390/app15169201 - 21 Aug 2025
Viewed by 3763
Abstract
This paper presents a fully electronic, CMOS-compatible ultrasonic sensing system integrated into a 3D beamforming architecture for advanced automotive applications. The proposed system eliminates mechanical scanning by implementing a dual-path beamforming structure comprising programmable transmit (TX) and receive (RX) paths. The TX beamformer [...] Read more.
This paper presents a fully electronic, CMOS-compatible ultrasonic sensing system integrated into a 3D beamforming architecture for advanced automotive applications. The proposed system eliminates mechanical scanning by implementing a dual-path beamforming structure comprising programmable transmit (TX) and receive (RX) paths. The TX beamformer introduces per-element time delays derived from steering angles to control the direction of ultrasonic wave propagation, while the RX beamformer aligns echo signals for spatial focusing. Electrostatic actuation governs the CMOS-compatible ultrasonic transmission mechanism, whereas dynamic modulation under acoustic pressure forms the reception mechanism. The system architecture supports full horizontal and vertical angular coverage, leveraging delay-and-sum processing to achieve electronically steerable beams. The system enables low-power, compact, and high-resolution sensing modules by integrating signal generation, beam control, and delay logic within a CMOS framework. Theoretical modeling demonstrates its capability to support fine spatial resolution and fast response, making it suitable for integration into autonomous vehicle platforms and driver-assistance systems. Full article
(This article belongs to the Special Issue Ultrasonic Transducers in Next-Generation Application)
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