Chen Si, Li Junru, Gao Yang, Li Jianbo, Dong Hongmei, Gu Zhijun, Ren Wanchun
School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China.
College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
Micromachines (Basel). 2022 Feb 8;13(2):272. doi: 10.3390/mi13020272.
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.
长期以来，植入式医疗设备一直面临着无线通信的严峻挑战。声驱动磁电（ME）换能器天线因其小型化、高辐射效率和易于集成而备受关注。在此，我们通过详细描述BAW ME天线与传统发射器各组件之间的对应关系，充分证明了仅使用一个体声波（BAW）驱动的ME换能器天线（BAW ME天线）进行通信的可能性。具体而言，我们首先证明，通过施加直流（DC）磁偏置并激发BAW ME天线从中频（MF）（1.5 MHz）到超高频（UHF）（2 GHz）的不同共振模式，可以对信号进行调制。然后，提出了两种调整BAW ME天线辐射功率以实现信号放大的方法，包括增加输入电压和使用高阶共振。最后，提出了一种基于电磁（EM）扰动的方法，通过有限元分析（FEA）模型模拟BAW ME天线的传输过程。模拟结果与磁偶极子的辐射方向图完美匹配，这验证了模型和我们的目的。
