Effect of Layer Spacing and Coil Center Distance of PCB Coil on Resonant Frequency

Abstract

With the development of electronic science and technology, people have entered the information society, a variety of portable electronic products enter people’s lives. A large number of miniature human implantable medical devices applied to clinical fields. The traditional human implantable medical device power supply is implanted battery, its biggest drawback is the treatment problem after the battery power consumption. Whether it is taken to replace the new battery, or deep into the body, there is a huge risk. Therefore, the portable external wireless charging, it becomes the best choice for human implantable medical devices. In this paper, HFSS software is used to simulate, a large number of simulation experiments are carried out on the PCB with 2 layers coils. At the same time, the electrical parameters such as layer spacing, coil center distance and resonant frequency are analyzed. Finally, the conclusion is: in the case of fixed layer spacing, with the increasing of the coil center distance, the resonance frequency is gradually increasing; The increasing trend is becoming more and more obvious. When the coil center distance is fixed, with the growing layer spacing, the resonance frequency value is constantly increasing, the resonant frequency of the growth is also more and more slow.