Design and Fabrication of Low-Loss Toroidal Air-Core Inductors

@article{Sullivan2007DesignAF,
  title={Design and Fabrication of Low-Loss Toroidal Air-Core Inductors},
  author={C. Sullivan and Weidong Li and Satish Prabhakaran and Shanshan Lu},
  journal={2007 IEEE Power Electronics Specialists Conference},
  year={2007},
  pages={1754-1759}
}
The design and fabrication of high-Q air-core toroidal inductors are described. Designs are optimized for maximum Q for a given size and inductance, independent any particular fabrication process. A fabrication process using a combination of thin-film processes and conventional machining has been used to make prototypes. Measurements performed on the first prototypes confirm the predicted Q of 115 at 50 MHz. 
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