The feeding network is built with Wilkinson power
dividers as shown in the right hand side of the figure. Such
feeding structures become more interesting if they are placed
in a layer of a 3D system inside the circuit with buried strip
lines and resistors. Via chains around the structure suppress
unwanted cross-talk with neighboring components. The
optimization of the divider design must be done applying an
electromagnetic field solver, e.g. the IMST in-house developed
3D FDTD field simulator EMPIRETM [13]. Fig. 6 shows the
Wilkinson divider in the software environment with visualised
field distribution of the perpendicular electric field for two
different field excitations at port 1 and port 2, respectively