Fast Radiation-Pattern Computing Method for Pulsed Antenna Array

A fast radiation- pattern computing method for pulsed antenna array was proposed in this paper. This method combines ideal point source model with antenna element simulation,and exploits electromagnetic superposition principle to get the radiation- waveform by the array in the farfield of arbitrary direction,and uses the waveforms to calculate spatial distribution of energy and peak power to achieve radiation- pattern of array. This method can simulate only one element antenna instead of the whole array system which makes it faster. The simulation results show that an array of 5 TEM horn antenna array's energy pattern and peak power pattern computed by this method and simulated by Finite Difference Time Domain method are exactly matched in main lobe.