屏蔽电缆屏蔽效能与转移阻抗关系研究
Studying the Relationship between Shielding Effectiveness and
Transfer Impedance of Shielding Cable
摘要 阐述了转移阻抗和屏蔽效能的定义,并从辐射角度出发,分析了屏蔽电缆屏蔽效能与芯线电流及屏蔽层电流之间的关系,同时结合传输线理论,推导了屏蔽效能与转移阻抗的数学关系,并通过仿真计算,比较了不同条件下的屏蔽效能与转移阻抗。
关键词 屏蔽电缆;转移阻抗;屏蔽效能
Abstract This paper describes the definition of transfer impedance and shielding
effectiveness, analyzing the relationship between the shielding effectiveness and core
current and shield current from the radiation point of view, combined with the
transmission line theory, deriving the mathematic relationship between shielding
effectiveness and transfer impedance, through the simulation, comparing the shielding
effectiveness with transfer impedance under different conditions.
Keywords shielding cable; transfer impedance; shielding effectiveness
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