Abstract: First, the electromagnetic radiation model of the aperture on coaxial cable is set up using computational electromagnetics methods, such as FDTD (finite differcence time domain) and MoM (method of moment) etc. Then, a detailed analysis of the characteristics of the radiation is given while digital signal being transmitted in the cable. At last, the simulation of interception and reconstruction of the electromagnetic radiation arising from the aperture on coaxial cable in far zone is completed. This makes it clear that the interception andrecovery of information leakage is available.

Key words: coaxial cable connector, computational electromagnetics, electromagnetic radiation, information leakage