The Electromagnetic Leakage of Shielded-Twist-pair with a Transverse Slot
Tian Fang①②; Gong Zhong-lin①
①School of Electronics Engineering & Computer Science, Peking University, Beijing 100871, China; ②Division of Mathematics and Physics, Chinese People’s Public Security University, Beijing 100038, China
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.
2007, Vol. 29 
