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   Articles with "frequency mixing" as a keyword



Analysis of nonlinear frequency mixing in Timoshenko beams with a breathing crack using wavelet spectral finite element method

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recommendations! Published in 2020 at "Journal of Sound and Vibration"

DOI: 10.1016/j.jsv.2020.115532

Abstract: Abstract The nonlinear interaction of a dual-frequency Lamb wave with a breathing edge-crack leads to the generation of frequency sidebands in the response spectrum; a phenomenon referred to as the nonlinear frequency mixing. These sidebands… read more here.

Keywords: frequency; spectral finite; nonlinear frequency; breathing crack ... See more keywords
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Detection of Multiway Gamma Coordination Reveals How Frequency Mixing Shapes Neural Dynamics

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recommendations! Published in 2019 at "Neuron"

DOI: 10.1016/j.neuron.2018.12.028

Abstract: A principle of communication technology, frequency mixing, describes how novel oscillations are generated when rhythmic inputs converge on a nonlinearly activating target. As expected given that neurons are nonlinear integrators, it was demonstrated that neuronal… read more here.

Keywords: coordination reveals; neural dynamics; multiway gamma; gamma coordination ... See more keywords
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A combined averaging and frequency mixing approach for force identification in weakly nonlinear high-Q oscillators : Atomic force microscope

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recommendations! Published in 2018 at "Mechanical Systems and Signal Processing"

DOI: 10.1016/j.ymssp.2017.08.015

Abstract: We present a polynomial force reconstruction of the tip-sample interaction force in Atomic Force Microscopy. The method uses analytical expressions for the slow-time amplitude and phase evolution, ... read more here.

Keywords: mixing approach; averaging frequency; combined averaging; atomic force ... See more keywords

Effects of frequency mixing on Shapiro-step formations in sliding charge-density-waves

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recommendations! Published in 2024 at "Applied Physics Letters"

DOI: 10.1063/5.0237536

Abstract: A one-dimensional charge-density wave (CDW) is driven to slide by a dc electric field, carrying an electric current. In an additional ac field with frequency ωex, it is known that the sliding CDW can be… read more here.

Keywords: frequency mixing; step; effects frequency; mixing shapiro ... See more keywords

Microcrack localization using a collinear Lamb wave frequency-mixing technique in a thin plate

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recommendations! Published in 2022 at "Chinese Physics B"

DOI: 10.1088/1674-1056/ac0da8

Abstract: A novel Lamb wave frequency-mixing technique is proposed for locating microcracks in a thin plate, which does not require the resonance condition of Lamb wave mixing and can accurately locate the microcracks through only one-time… read more here.

Keywords: plate; frequency; mixing technique; lamb wave ... See more keywords

Design of Switchable SHG and THG Using Metasurface-Based Frequency Mixing System

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recommendations! Published in 2024 at "IEEE Antennas and Wireless Propagation Letters"

DOI: 10.1109/lawp.2023.3330853

Abstract: In this letter, we propose a nonlinear reflective metasurface-based frequency mixing system able to perform second-harmonic generation (SHG) and third-harmonic generation (THG). The metasurface consists of a planar bidimensional alignment of unit-cells, each of which… read more here.

Keywords: shg thg; metasurface based; frequency mixing; frequency ... See more keywords
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Frequency-Mixing Intelligent Reflecting Surfaces for Nonlinear Wireless Propagation

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recommendations! Published in 2021 at "IEEE Wireless Communications Letters"

DOI: 10.1109/lwc.2021.3077085

Abstract: We introduce the concept of frequency-mixing intelligent reflecting surface (FMx-IRS), where the elements of the surface continuously change the phases of the incident signals. In this way, the FMx-IRS acts as a frequency mixer and… read more here.

Keywords: frequency mixing; propagation; intelligent reflecting; mixing intelligent ... See more keywords

A Perspective of Using Frequency-Mixing as Entropy in Random Number Generation for Portable Hardware Cybersecurity IP

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recommendations! Published in 2024 at "IEEE Transactions on Information Forensics and Security"

DOI: 10.1109/tifs.2023.3322602

Abstract: True random number generator (TRNG) is a crucial component in security. In typical TRNGs, entropy comes directly from device noises. In this work, an improved method of using frequency-mixing as means for enriching entropy is… read more here.

Keywords: frequency mixing; trng; using frequency; random number ... See more keywords

Ultrasound Frequency Mixing for Enhanced Contrast Harmonic Imaging of Microbubbles

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recommendations! Published in 2022 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"

DOI: 10.1109/tuffc.2022.3179471

Abstract: Microbubbles (MBs) serve as contrast agents in diagnostic ultrasound (US) imaging. Contrast harmonic imaging (CHI) of MBs takes advantage of their nonlinear properties that generate additional harmonic frequencies in the received spectrum. However, CHI suffers… read more here.

Keywords: harmonic imaging; contrast; frequency; contrast harmonic ... See more keywords

Nonlinear Resonance of Cavities Filled with Bubbly Liquids: A Numerical Study with Application to the Enhancement of the Frequency Mixing Effect

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recommendations! Published in 2018 at "Shock and Vibration"

DOI: 10.1155/2018/1570508

Abstract: This paper studies the nonlinear resonance of a cavity filled with a nonlinear biphasic medium made of a liquid and gas bubbles at a frequency generated by nonlinear frequency mixing. The analysis is performed through… read more here.

Keywords: resonance; frequency; nonlinear resonance; resonance cavities ... See more keywords

A Time-Modulated Transparent Nonlinear Active Metasurface for Spatial Frequency Mixing

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recommendations! Published in 2022 at "Materials"

DOI: 10.3390/ma15030873

Abstract: In this article, a time-modulated transparent nonlinear active metasurface loaded with varactor diodes was proposed to realize spatial electromagnetic (EM) wave frequency mixing. The nonlinear transmission characteristic of the active metasurface was designed and measured… read more here.

Keywords: bias voltage; time; time modulated; active metasurface ... See more keywords