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High-Bandwidth Low-Insertion Loss Solenoid Transformers Using FeCoB Multilayers

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3 Author(s)
Xing Xing ; Analog Device, Inc.., Wilmington, MA, USA ; Sun, N.X. ; Baoxing Chen

High-bandwidth low-insertion loss solenoid transformers using a multilayered FeCoB magnetic core have been designed, modeled, fabricated, and characterized for high-frequency power conversion. Various transformer designs are compared in terms of inductance, resistance, quality factor, mutual coupling, and insertion loss. A mutual coupling coefficient of 0.9 up to 50 MHz is achieved for intertwined solenoid transformers with a patterned magnetic core.

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Power Electronics, IEEE Transactions on  (Volume:28 ,  Issue: 9 )