We simulate a dual-mode conical horn antenna to validate the BOR-FDTD program, as shown in Figure 4.
A corrugated-conical horn antenna with horizontal corrugations (see Figure 7) is optimized by the combined methods between FGPMGA and BOR-FDTD. The radius and length of the input waveguide is [R.sub.0] = 13.6 mm and [L.sub.0] = 20 mm, respectively.
It is worth noting that the calculation time of the optimization is dominated by the number of BOR-FDTD computation on each processor.