Abstract
A parallelized finite-difference time-domain(FDTD) algorithm based on MPI platform, combined with antenna theory, is presented for analysis of the radiation characteristics of the large biconical-cylindrical cage antenna fed through the coaxial transmission line and excited by a double-exponential pulse, which can not be done on a personal computer due to long time and limited computation resources. The number of total cells for parallelized FDTD computing is about 2 billion. Numerical results show that cage antenna radius do not have a significant effect on the rise time and the peak value of the radiated electric field when the cage antenna radius is more than 3.5 m. In addition, the reflection and the loss from the ground have a great effect on the peak value and pulse width of the radi
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