Rectangular Horn : Physical Optics Reflector
The starting point of this example is the previous example : Rectangular Horn : Reflector
The only difference is the calculation technique affected to the reflector. To apply this modification, create a new interface and assign it to the reflector. The new interface is exactly the same as the default Interface1, except for the "Calculation Technique" which is changed to "PO" instead of "MoM" :
Draw the interfaces to check if they are properly assigned :
Re-mesh the structure in order to apply the new interface properties. Save and launch the computation.
The expert's tip :
For each PO triangle, the near field radiated by all the MoM triangles is computed to obtain the PO surface current. This may require important CPU time. To reduce that, try to decrease the "Distance for quick computation" in the Options.
After the computation, a new result is available for the 3D visualisation : the Physical Optics Electrc Surface Currents. The following snapshot shows these surface currents :
Compared to there MoM counterparts, the PO surface currents may appear simpler. However, the far field radiation pattern deduced form these currents is very similar to the pattern obtained in the full MoM previous example :
The expert's tip :
The PO technique available in Icare is well suited for reflector antennas. IEEA also develops a GO/PO code for RCS computation of complex geometries, using a fast rays/triangles intersection algorithm to determine which parts are visible from the source. Contact IEEA for more information about this tool called ZEPHIR.
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