Open AccessRechargeable neurostimulator with H‐shaped fractal slots in PCB copper layers
Author(s) -
Li Qingfeng,
Chen Shaobo,
Wang Weiming,
Hao Hongwei,
Li Luming
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2014.4424
Subject(s) - fractal , copper , printed circuit board , materials science , eddy current , range (aeronautics) , metal , optoelectronics , acoustics , electrical engineering , composite material , engineering , metallurgy , physics , mathematics , mathematical analysis
Rechargeable neurostimulators make it possible to research and treat brain disorders for a long period of time. However, metal objects such as device cases and inner copper layers of the printed circuit board (PCB) lower the energy transfer efficiency and can even present safety risks due to the eddy currents in these metals. The use of a fractal pattern slot in the metal to suppress the eddy currents is proposed and a rechargeable neurostimulator with deformed H‐shape fractal slots in the PCB inner copper layers is described. The results show that the use of an H‐shaped fractal pattern slot is effective over a relatively wide frequency range and the maximum temperature of the neurostimulator is in the range of 34.5–39.5°C, which indicates that the device can be used safely for long‐term animal studies and even in the clinical treatment of brain disorders.