In this paper , the crosstalk and radiation of multiple - core cable is analyzed according as the multiconductor transmission line , two ports network and antenna theory . firstly the fundamental theories are presented 本文主要依據多導體傳輸線理論、二端口網絡理論和天線理論對多芯電纜的耦合泄漏和輻射發(fā)射進行了較為詳細的分析討論。