Abbas Saad Mutashar, Hannan Mahammad A, Samad Salina A, Hussain Aini
Biomed Tech (Berl). 2014 Jun;59(3):257-68. doi: 10.1515/bmt-2013-0058.
Use of transcutaneous inductive links is a widely known method for the wireless powering of bio-implanted devices such as implanted microsystems. The design of the coil for inductive links is generally not optimal. In this study, inductive links were used on the basis of the small loop antenna theory to reduce the effects of lateral coil misalignments on the biological human tissue model at 13.56 MHz. The tissue, which measures 60 mm×70 mm×5 mm, separates the reader and the implanted coils. The aligned coils and the lateral misalignment coils were investigated in different parametric x-distance misalignments. The optimal coil layout was developed on the basis of the layout rules presented in previous studies. Results show that the gain around the coils, which were separated by wet and dry skin, was constant and confirmed the omnidirectional radiation pattern even though the lateral misalignment between coils was smaller or greater than the implanted coil radius. This misalignment can be <4 mm or >6 mm up to 8 mm. Moreover, coil misalignments and skin condition do not affect the efficient performance of the coil.
使用经皮感应链路是一种为诸如植入式微系统等生物植入设备进行无线供电的广为人知的方法。用于感应链路的线圈设计通常并非最优。在本研究中，基于小环天线理论使用感应链路，以减少在13.56兆赫兹频率下横向线圈未对准对人体生物组织模型的影响。尺寸为60毫米×70毫米×5毫米的组织将读取器和植入式线圈隔开。研究了对齐线圈和横向未对准线圈在不同参数x距离未对准情况下的情况。基于先前研究中提出的布局规则开发了最优线圈布局。结果表明，即使线圈之间的横向未对准小于或大于植入式线圈半径，被湿皮肤和干皮肤隔开的线圈周围的增益是恒定的，并且证实了全向辐射方向图。这种未对准可以小于4毫米或大于6毫米，最大可达8毫米。此外，线圈未对准和皮肤状况不会影响线圈的高效性能。
