An Analysis on the Influence of the Staggered Distance between PCB Rectangular Coils to the Wireless Energy Transmission Efficiency

With the development of science and technology, implantable medical electronic devices are widely used in medical field, which provide new methods to human to defeat disease. With the requirements of implantable medical equipment to volume and portability, printed circuit board (PCB) coil in wireless energy transmission system application in space and finite height field with advantages of high precision, high consistency and easy to design and manufacture, the density function is greatly improved, these characteristics make it widely used in the field of magnetic resonance wireless power transmission. This paper use contrast experiment method, doing a large number of simulation experiment to double PCB coil according to 3D electromagnetic software (HFSS software), ensure that the PCB coils of electrical parameters, only changing the coil between the staggered distance, analyzing the adjacent two-layer PCB make effect on magnetic resonance frequency. Eventually reached the following conclusions: if the two-layer coils distances "s" is fixed, with the increase of displacement distance "a", the magnetic resonance frequency "f" also constantly increase, when it increases to a certain extent, it will tend to be stable.