横切窄缝屏蔽双绞线的电磁泄漏
doi: 10.3724/SP.J.1146.2006.00227
The Electromagnetic Leakage of Shielded-Twist-pair with a Transverse Slot
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摘要: 本文对屏蔽层横切窄缝的屏蔽双绞线的电磁泄漏进行了定量研究。分析了切缝屏蔽双绞线的电磁泄漏机制，并把其等效为级联网络。采用混合方法，即传输线链参方法、有限元方法和亚网格FDTD方法相结合，对切缝屏蔽双绞线的电磁泄漏进行了模拟分析。结果表明，在500MHz以下的频率内，即使屏蔽层被切断，屏蔽双绞线泄漏的能量最多不超过1%。Abstract: This paper propose a quantitative analysis on the electromagnetic leakage from a shielded-twist-pair with a transverse slot. The mechanism of electromagnetic leakage is analyzed, and then the slotted shielded-twist-pair is regarded as a cascaded network. By applying the hybrid-method, which is the combination of the chain-parameter-equation, the finite-element-method and the subcell-FDTD-method, the electromagnetic leakage from the transverse slot on the shield of the twist-pair are simulated. The results show that, below the frequency of 500MHz, the leaked energy from the slotted shielded-twist-pair is no more than 1% even if the shield layer is cut off.
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