Analysis of Radiation Field of a New Wire-grid TEM Horn

A new wire-grid transverse electromagnetic (TEM) horn as an electromagnetic pulse (EMP) radiating-wave simulator, with resistors, two PEC vertical plates and two sloping PEC plates loaded, are given. And the radiation fields of the new horn are simulated by parallel finite-difference time-domain (FDTD) method. The EMP's effects of the new horn are numerically studied and analyzed. The results show that the full width at half maximum (FWHM) of electric field increases as the total resistance of each wire increases and the tail effect of waveform weaken efficiently. The low-frequency characteristic of the new horn is improved greatly comparing with the normal TEM horn antenna.