期刊
MICROMACHINES
卷 13, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/mi13020272
关键词
bulk acoustic wave (BAW); magnetoelectric transducer; antenna; transmitter; implantable medical devices (IMDs); resonance modes; frequency modulation; radiation power; FEA
类别
资金
- Science and Technology on Electronic Information Control Laboratory [6142105200203, 61428060303]
- Fund of Robot Technology of the Special Environment Key Laboratory of Sichuan Province [20kfkt02]
- Science and Technology Foundation of Southwest University of Science and Technology [20zx7114]
- Sichuan Science and Technology Program [2021YJ0105]
- Key laboratory of Aerodynamic Noise Control [2001ANCL20200307]
In this study, we demonstrate the potential of using only one bulk acoustic wave (BAW) actuated magnetoelectric (ME) transducer antenna for communication. The signal can be modulated by adjusting the magnetic bias and exciting different resonance modes of the antenna. Two methods for signal amplification are proposed, and the transmission process is simulated using electromagnetic perturbation.
Implantable medical devices have been facing the severe challenge of wireless communication for a long time. Acoustically actuated magnetoelectric (ME) transducer antennas have attracted lots of attention due to their miniaturization, high radiation efficiency and easy integration. Here, we fully demonstrate the possibility of using only one bulk acoustic wave (BAW) actuated ME transducer antenna (BAW ME antenna) for communication by describing the correspondence between the BAW ME antenna and components of the traditional transmitter in detail. Specifically, we first demonstrate that the signal could be modulated by applying a direct current (DC) magnetic bias and exciting different resonance modes of the BAW ME antenna with frequencies ranging from medium frequency (MF) (1.5 MHz) to medium frequency (UHF) (2 GHz). Then, two methods of adjusting the radiation power of the BAW ME antenna are proposed to realize signal amplification, including increasing the input voltage and using higher order resonance. Finally, a method based on electromagnetic (EM) perturbation is presented to simulate the transmission process of the BAW ME antenna via the finite element analysis (FEA) model. The simulation results match the radiation pattern of magnetic dipoles perfectly, which verifies both the model and our purpose.
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