Theoretical Studies of Magnetoelectric Enhancement in Bar-Shaped Laminate Based on Mechanical Connection and Equivalent Circuit Methods

Leung, Chung Ming; Wu, Kaiwen

doi:10.1007/s11664-021-09134-w

Cited by 1 publication

(1 citation statement)

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“…The copper coil was wound with 300 turns, possessing a diameter of 10 mm and a length of 20 mm. Furthermore, the magnetic detection sensitivity of the copper coil underwent calibration using an in-house automated magnetic field coefficient measurement system [ 33 ]. It is worth noting that the utilization of the calibrated copper coil as a magnetic field sensor ensured precise and reliable measurements, contributing to the accuracy and reproducibility of the experimental results.…”

Section: Radiation Performance Characterization Of Me Antennasmentioning

confidence: 99%

Self-Biased Magneto-Electric Antenna for Very-Low-Frequency Communications: Exploiting Magnetization Grading and Asymmetric Structure-Induced Resonance

Leung,

Zheng,

Yang

et al. 2024

Sensors

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VLF magneto-electric (ME) antennas have gained attention for their compact size and high radiation efficiency in lossy conductive environments. However, the need for a large DC magnetic field bias presents challenges for miniaturization, limiting portability. This study introduces a self-biased ME antenna with an asymmetric design using two magneto materials, inducing a magnetization grading effect that reduces the resonant frequency during bending. Operating principles are explored, and performance parameters, including the radiation mechanism, intensity and driving power, are experimentally assessed. Leveraging its excellent direct and converse magneto-electric effect, the antenna proves adept at serving as both a transmitter and a receiver. The results indicate that, at 2.09 mW and a frequency of 24.47 kHz, the antenna has the potential to achieve a 2.44 pT magnetic flux density at a 3 m distance. A custom modulation–demodulation circuit is employed, applying 2ASK and 2PSK to validate communication capability at baseband signals of 10 Hz and 100 Hz. This approach offers a practical strategy for the lightweight and compact design of VLF communication systems.

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Section: Radiation Performance Characterization Of Me Antennasmentioning

confidence: 99%