摘要
为了使无线电通讯系统达到EMC的要求,从非屏蔽双绞线(UTP)中辐射出来的无线电信号必须得到抑制。工程上是通过在非屏蔽双绞线上加铁氧体磁环来抑止辐射发射,并通过实际的测试来看抑止的效果。而本文把加铁氧体磁环的双绞线抽象成为一个4端口网络,通过计算来看抑止的效果。这个计算出的辐射抑制效果,与实际测试的结果比较吻合。从而证明该方法的正确性。
Telecommunication signal emissions from unshielded twisted pair （UTP） cable should be suppressed to maintain EMC of telecommunication systems. Usually people use the ferrite cores to suppress the emissions, and suppression effects is known by testing. In this paper twisted pair wire with ferrite core was modeled by 4-port network .Then the emission suppression effect were obtained from calculated, The results were almost agree with measured value. It prove that this method is Correctly.
出处
《电子质量》
2007年第11期85-86,92,共3页
Electronics Quality
