Reply To: Questions and recommendations: Septum Horn Antenna

[Gia]

Ensure that your port boundary conditions correctly represent the physical setup you expect in the actual device. This involves setting up the ports in places where the field patterns (mode shapes) and impedance conditions match your real-world connectors.

Since you're dealing with dual-polarization, you need to ensure that the mode conversions (from TE to hybrid HE or EH modes) are being handled correctly in your simulation. You should verify that the expected modes are excited and that the phase conditions (like 90-degree phase shift between Ex and Ey are correctly observed in the simulation results.

Check the simulation results at both 1.42 GHz and 1.667 GHz specifically. Look at parameters like S-parameters, field distributions, and phase conditions. Ensure that the performance at these frequencies meets the design criteria.

Ensure that you are exciting and observing the correct modes at your input and output ports. This is critical for dual-polarization performance.

Check that the amplitude and phase of the output signals are balanced as expected.

For the extraction of circular polarizations, ensure that the placement of coaxial probes (or other extraction mechanisms) is optimized for phase and amplitude extraction at quarter wavelengths from the reflector.