Numerical analysis of electric-magnetic vibrator combined ultrawideband antenna

Applying CST electromagnetic software, using Guass pulse and PML6 boundary condition, the relation between physical structural parameters and performance of the electric-magnetic vibrator combined ultrawideband (UWB) antenna was investigated. The results indicate the conductor screen and current loop of antenna improve port parameter of different frequency. When the total lergth of current loop with 105 cm is about twice as antenna size with 50 cm, the reflected energy of antenna is less and the port parameter is flatted. Radiation bandwidth of antenna is decided by its physicl size, and the bigger the antenna size is, the better the radiated performance of low frequency is.