Modeling of Multiple Dynamics in the Radiation of Bulk Acoustic Wave Antennas

Yao, Zhi; Tiwari, Sidhant; Ting, Lu; Rivera, Jesse; Luong, Kevin; Candler, Robert N.; Carman, Gregory P.; Wang, Yuanxun Ethan

doi:10.1109/jmmct.2019.2959596

Cited by 45 publications

(22 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…with n the normal to the surface. The elastodynamic equation of motion is given by [70,71] ρü + ηu = f tot , (11) with η a phenomenological damping parameter and f tot the total body force acting on the material. This body force is…”

Section: A Spin Waves Lamb Waves and Magnetoelasticitymentioning

confidence: 99%

“…The amplitude and the profilew n as well as the dispersion relation of magnetoelastic waves in the waveguide can be obtained by solving the coupled differential equations of motion (8) and (11). A major complication is, however, the analytical self-consistent calculation of the demagnetization field.…”

Section: B Linear Magnetoelastic Waves In Thin Waveguidesmentioning

confidence: 99%

“…In recent years, the coupling between elastic and magnetic degrees of freedom in magnetostrictive materials has gained renewed interest due to emerging nanoscale spintronic applications, such as magnetic memory cells [1][2][3][4], logic devices [5][6][7][8], sensors [9,10], or compact microwave antennas [11,12]. In magnetostrictive ferromagnets, the magnetoelastic coupling leads to an elastic response to a magnetic excitation and vice versa.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Confined magnetoelastic waves in thin waveguides

et al. 2021

View full text Add to dashboard Cite

The characteristics of confined magnetoelastic waves in nanoscale ferromagnetic magnetostrictive waveguides have been investigated by a combination of analytical and numerical calculations. The presence of both magnetostriction and inverse magnetostriction leads to the coupling between confined spin waves and elastic Lamb waves. Numerical simulations of the coupled system have been used to extract the dispersion relations of the magnetoelastic waves as well as their mode profiles.

show abstract

Section: A Spin Waves Lamb Waves and Magnetoelasticitymentioning

confidence: 99%

Section: B Linear Magnetoelastic Waves In Thin Waveguidesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Confined magnetoelastic waves in thin waveguides

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The significance of magnetization dynamics, operating conditions, and material properties on magnetoelastic coupling has been clearly demonstrated in studies involving magnetostrictive materials as well as magnetostrictive-piezoelectric heterostructures [10,11]. Recent attempts have been made to incorporate magnetization dynamics in the modeling of mechanically driven magnetoelectric antennas [12]; nevertheless, operating condition and material property effects are still largely hidden by constitutive equations. All these past approaches additionally share the fact that they derive antenna performance from numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

“…These expressions provide insight into the design and operation choices that will maximize antenna performance. Our approach focuses solely on magnetoelastic coupling and so, in contrast with past approaches [2,7,9,12], electrodynamics are not considered. In the following sections, we introduce the equations governing magnetization dynamics along with the operating conditions and material properties of interest.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Dynamic Magnetoelastic Coupling in Mechanically Driven Magnetoelectric Antennas

Luong

Wang

2022

Sensors

Self Cite

View full text Add to dashboard Cite

Mechanically driven magnetoelectric antennas are a promising new technology that enable a reduction in antenna size by many orders of magnitude, as compared to conventional antennas. The magnetoelastic coupling in these antennas, a phenomenon playing a direct role in determining performance, has been modeled using approaches that are severely lacking in both accuracy and tractability. In response to this problem, we take a physics-based approach to the analysis of magnetoelastic coupling. We find that certain directions of applied stress will maximize the coupling and we derive general expressions to quantify it. Our results are applied in comprehensive simulations that demonstrate the dynamic nature of the coupling as well as the impact of various operating conditions and material properties. Our work contributes analytical expressions and associated insight that can serve not only as guidelines for the design of mechanically driven magnetoelectric antennas, but also as stepping stones towards the development of more accurate models.

show abstract

Enhanced Radiation Efficiency by Resonant Coupling in a Large Bandwidth Magnetoelectric Antenna

Ma,

Chen,

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

Magnetoelectric (ME) antennas hold the potential for significantly advancing miniaturization in radio frequency devices due to their compact size. However, critical hurdles still remain in ME antennas including low radiation efficiency and narrow bandwidth, which prevent them from seeing widespread use. Here, by sweeping the magnetic field to reach a resonant coupling, a significant enhancement in radiation efficiency by 70.95 ± 6.4% in a broad bandwidth ME antenna with 80 MHz is achieved as well as the far‐field radiation patterns are changed compared with that via non‐resonant coupling. The enhancement depends on the relative orientation between the magnetization and surface acoustic wave propagation direction which is dominated by the symmetry of the driving field induced by shear strain. A larger enhancement occurs when the magnetic field along hard axis of Ni due to the matching helicity and larger strain compared with easy axis scenario. This work demonstrates an innovative methodology that significantly enhances the radiation and reception efficiency in ME antennas, which may provide ideas for subsequent applications in communication antennas and magnetic sensors.

show abstract

Modeling of Multiple Dynamics in the Radiation of Bulk Acoustic Wave Antennas

Cited by 45 publications

References 37 publications

Confined magnetoelastic waves in thin waveguides

Confined magnetoelastic waves in thin waveguides

Analysis of Dynamic Magnetoelastic Coupling in Mechanically Driven Magnetoelectric Antennas

Enhanced Radiation Efficiency by Resonant Coupling in a Large Bandwidth Magnetoelectric Antenna

Contact Info

Product

Resources

About