IEEE Ultrasonics Ferroelectrics and Freq Control

  • Front Cover
    Posted on September 1, 2020 at 12:00 am

    Presents the front cover for this issue of the publication. […]

  • Negative Piezoelectric-Based Electric-Field-Actuated Mode-Switchable Multilayer Ferroelectric FBARs for Selective Control of Harmonic Resonances Without Degrading <italic>K</italic><sub>eff</sub>&#x00B2;
    Posted on September 1, 2020 at 12:00 am

    Mode-switchable ferroelectric thin-film bulk acoustic resonators (FBARs) are presented. Such resonators operate based on a dynamic nonuniform effective piezoelectricity in composite multilayer ferroelectrics with large electrostriction coefficients, like barium strontium titanate (BST). Harmonic resonance modes (nfo) of a multilayer ferroelectric bulk acoustic wave (BAW) resonator can be […]

  • IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
    Posted on September 1, 2020 at 12:00 am

    Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication. […]

  • Resonant Tuning of Langevin Transducers for Ultrasonically Assisted Machining Applications
    Posted on September 1, 2020 at 12:00 am

    This article provides a fundamental study into the trade-offs between the location of piezoceramic elements, resonant frequency, and achievable ultrasonic vibration amplitude at the working end of the bolted Langevin-style transducers (BLTs) for ultrasonically assisted machining (UAM) applications. Analytical models and finite-element (FE) models are established for theoretical study, which are […]

  • Table of contents
    Posted on September 1, 2020 at 12:00 am

    Presents the table of contents for this issue of the publication. […]

  • Uniformization of Mass Sensitivity Distribution of Silver Electrode QCM
    Posted on September 1, 2020 at 12:00 am

    Quartz crystal microbalance (QCM) is a highly sensitive mass sensor and has been widely used in many fields. However, the nonuniform distribution of mass sensitivity will lead to poor reproducibility of QCM, which is not conducive to the application of QCM in some fields. Considering the effect of electrode shape, size, and material on mass sensitivity distribution, we found that for an AT-cut […]

  • Design and Development of a Tunable Ferroelectric Microwave Surface Mounted Device
    Posted on September 1, 2020 at 12:00 am

    Based on a Ba(1-x)SrxTiO3 ferroelectric thin film, a discrete tunable surface mounted device (SMD) capacitor has been developed for microwave frequency applications. The proposed SMD topology has the particular advantage of inherent decoupling between the RF signal and the dc biasing voltage, necessary to tune the ferroelectric permittivity. The design and technological development of the SMD […]

  • Stress-Sensing Method via Laser-Generated Ultrasound Wave Using Candle Soot Nanoparticle Composite
    Posted on September 1, 2020 at 12:00 am

    This article aims to develop a semi-noncontact stress-sensing system using a laser-generated ultrasound (LGU) wave assisted by candle soot nanoparticle (CSNP) composite. While the acoustoelastic effect is commonly targeted to measure the stress level, efforts to combine it with the LGU wave signal have been lacking due to weak signal intensity. In this study, the CSNP-based transducer is designed […]

  • Kalman Filter-Based Microbubble Tracking for Robust Super-Resolution Ultrasound Microvessel Imaging
    Posted on September 1, 2020 at 12:00 am

    Contrast microbubble (MB)-based super-resolution ultrasound microvessel imaging (SR-UMI) overcomes the compromise in conventional ultrasound imaging between spatial resolution and penetration depth and has been successfully applied to a wide range of clinical applications. However, clinical translation of SR-UMI remains challenging due to the limited number of MBs detected within a given […]

  • Advanced Substrate Material for SAW Devices Combining LiNbO&#x2083; and Langasite
    Posted on September 1, 2020 at 12:00 am

    A layered structure combining a thin plate of lithium niobate (LN) with a langasite (LGS) substrate was numerically investigated as an advanced substrate material for surface acoustic wave (SAW) devices with improved characteristics, including capability of operating at high temperatures. The longitudinal leaky SAWs (LLSAWs) propagating with negligible attenuation and high velocities up to 6400 […]

  • Accurate and Precise Time-Delay Estimation for Ultrasound Elastography With Prebeamformed Channel Data
    Posted on September 1, 2020 at 12:00 am

    Free-hand palpation ultrasound elastography is a noninvasive approach for detecting pathological alteration in tissue. In this method, the tissue is compressed by a handheld probe and displacement of each sample is estimated, a process which is also known as time-delay estimation (TDE). Even with the simplifying assumption that ignores out of plane motion, TDE is an ill-posed problem requiring […]

  • Common-View Time Transfer Using Geostationary Satellite
    Posted on September 1, 2020 at 12:00 am

    The National Time Service Center (NTSC), Chinese Academy of Sciences (CAS), Xi'an, China, has developed a method for common-view time transfer using Geostationary Earth Orbit (GEO) satellite (GCV) applicable to the time and frequency transfer at distant stations. This method is independent of Global Navigation Satellite System (GNSS) time and frequency transfer, as well as two-way satellite time […]