FEKO

去看 Example 35: Horn antenna in front of a reflector replaced
with equivalent surface currents or far field pattern
Figure 2-81: Horn in front of a parabolic reflector
This example considers a horn antenna in front of a parabolic reflector. The reflector is
treated with the PO and the horn with the MoM. Even if the MoM is decoupled from
the PO, the calculation of the interaction between the MoM basis functions and the PO
triangles can be quite time consuming. More so if the solution has to be repeated a
number of times, for example to optimise the shape of the reflector.
The antenna can be removed by using the equivalence theorem, in particular the apertures
created with the AP card. This requires two model files. The first (example 35a.pre)
calculates the near fields on six planes surrounding the antenna and writes it to *.efe
and *.hfe files for later use. (It also calculates the far field pattern, but that will be
discussed later.)