Hello
I designed a patched antenna to resonate at 5GHz using HFSS but the problem is when i fed it using Lumped port the frequency shifted by one GHz and if i used wave port the result is good ...
Please Can anyone help me to knew why does this happened ?
when i used wave port i defined radiation boundary as BOX and it touch the wave port in same surface ... so i changed the port so i should change the radiation boundary