EMI rejection inductors and methods of constructing EMI rejection inductors
By employing a magnetic core and signal line structure in the inductor and utilizing dielectric components to maintain pin spacing and insulation, the problems of current retention and noise suppression in traditional inductors for Power over Ethernet applications are solved, achieving improved impedance performance and ESD protection in the high frequency range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- STEWARD FOSHAN MAGNETICS CO LTD
- Filing Date
- 2025-09-25
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional local area network magnetic common-mode chokes have difficulty maintaining high current in Power over Ethernet (PoE) applications, resulting in increased power capacity and challenges in manufacturing, electrostatic discharge protection, and poor crosstalk noise suppression.
It adopts a magnetic core and signal line structure. The signal line includes pins partially embedded with dielectric components. The dielectric components maintain pin spacing and insulation. They are bent into a U-shape by a clamp. The dielectric and pins are bent into a gull shape or wing shape. Epoxy resin is used for bonding to ensure solder coplanarity and suppress common-mode noise through a single magnetic circuit.
It improves the impedance performance of the inductor, achieves high current load capacity, enhances ESD protection and noise suppression, reduces manufacturing complexity, and provides a compact design for applications in a high frequency range.
Smart Images
Figure CN122417637A_ABST