Influence of horn structure on electric-magnetic vibrator combined UWB antenna characteristic

The electric-magnetic vibrator combined ultrawideband antenna consist of three parts: feed-in system,TEM horn radiation unit and current loop radiation unit. Applying CST electromagnetic software, the relation between physical structure and port S parameter and the radiation characteristic in time domain of the electric-magnetic vibrator combined ultrawideband (UWB) antenna were investigated. The results indicate that when the TEM horn radiation unit and current loop radiation unit are divided three parts, the antenna has smaller port S parameter, larger power on main axis and it has better direction.