HFSS putting port inside the radiation box

[tomath]

Hello,

I am trying to build a X-Band (8.4 GHz) Probe Fed Patch Antenna that will be added to satellite structure on HFSS.
After I built the patch and made it resonate at 8.4 GHz, I tried to increase the boundary of radiation so the radiation box can reach beneath the antenna as well (since the patch antenna will have satellite structure at the bottom later). At first, it gave me an error, so I attached a very thin PEC cylinder, with the radius of the waveport on the bottom of the probe. I don't know if this is the problem of the probe or my dimensions for radiation box, but now the antenna is not resonating at 8.4 GHz. It still does resonante at 8.4 GHz if I let radiation box cover only above the surface of dielectirc. Can anyone please explain this?

I am trying to attach the file here, but it is keep saying invalid file.

 

[flanello]

Can you try to post a picture of the structure?

If you need a port inside a structure you have to use a lumped port.

 

[tomath]

This is just a wave port on the bottom of the patch. But even if I make it to a lumped port, I get same results... Resonance shifts to 7.5 GHz from 8.4 GHz if I increase the radiation boundary to the bottom of the port

 

[Amrutha M K]

u can try 2 optimize the length of patch to obtain resonance at 8.4ghz

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u can try 2 optimize the length of patch to obtain resonance at 8.4ghz

am a beginer on HFSS tool and i am ... i am not getting exact value we have take for the corporate feed network so plz tell me how 2 design a corporate feed network for 2*2 array patch ..plz plz do...

- - - Updated - - -

am a beginer on HFSS tool and i am ... i am not getting exact value we have take for the corporate feed network so plz tell me how 2 design a corporate feed network for 2*2 array patch ..plz plz do...