Patch Antenna at 5GHz using Hfss

[Muhammed_1]

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 ?

Thanks in advance

 

[vishal_sonam]

what type of feeding are you using? coaxial feeding or the microstrip line feeding?

 

[Muhammed_1]

microstrip line feeding

 

[vishal_sonam]

then you should use lumped port for your excitation because wave port is used if coaxial feeding and lumped port is used in microstrip line feeding.

i hope it will help you.

 

[Muhammed_1]

yes I used lumped port but the results are shifted ... i dont knew why ??

is there any modification in Radiation boundary i made it as i did in wave port .. is that right ??

 

[vishal_sonam]

i do not think radiation boundary will leave any effect.?

 

[Muhammed_1]

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

right ??