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Waves go through the Ground (PEC)!!!???

Haj Hassan

Hello,

i am currently simulating patch antenna array with a reflector.

I am using MLFMM and PO always illuminated for the Refletor.

I enlarge the Ground of the antenna to see the Influence on the radiation.

What i am not understanding is that the waves are going through the antenna!!!!!
After the Reflection of the waves the antenna is neglected for the waves!!!!

Can somebody help me????

Actually i want to study the behaviour of the size of the Ground on the waves.

Thnaks in advance.

Best Regards

Mohamed Haj Hassan

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Mel

Hi Kuzi

This is because you have switched off the coupling between PO and MoM (MLFMM): the patch array is solved first as if the reflector is not there. Then the solved currents on the patch array are used to illuminate the radome. Then Feko integrates over all the currents to obtain the fields. This solution will most assuredly radiate towards the bottom aka 'through the ground plane'

You would do better with a full MLFMM solution. You can save some resources by removing the finite thickness from the patches.

Haj Hassan

Hello,

thank you very much for your support.

How can i make the full MLFMM?

please tell me the right steps.

1-Shall i use Mom or MLFMM????

2-Shall i decouple PO and MOM????

3-Shall i use for the Reflector PO always illuminated??

Thanks in advance.

Best Regards

Mohamed Haj Hassan

Mel

Hi Kuzi

PO is not suitable due to the close proximity and strong coupling between the antenna and reflector and the fact that the structure is almost fully enclosed.

The Example Guide has examples showing how to activate MLFMM.