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A novel integration structure of EMI filter based on multilayer ceramic is proposed in this paper. The inductors and capacitors of the new structure can be designed separately, which is advantageous to manufacture. Besides, the Insertion Loss(IL) is usually measured under the condition of the source impedance and load impedance are both 50Ω, which is different from the actual situation. In the process...
Compared to passive discrete EMI filter, planar EMI filter has some advantages, such as small size, high power density and so on. However, the performance of EMI filter cannot be exactly predicted using existing methods. Therefore, the scattering parameters theory is obtained in this paper. Based on it, some researches has been done: The relationship between S-parameters and insertion gain (IG) of...
The planar electromagnetic interference (EMI) filter has good application in aviation for its easy magnetic integration, small parasitic parameter, and strong anti-EMI ability. Based on the annular structure, the common-mode (CM) and difference-mode (DM) modules are proposed. The former is formed by “capacitance and inductance” (LC unit), while the latter is formed by an independent DM capacitor and...
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