need help with hfss simulation

[hafizdaud]

hi,
I want to simulate an inverted F antenna using Hfss simulation V 15.0. The antenna's design has been simulated with EM pro 2010 by resonance frequency of 2.44 Ghz and it gets the expected result. My problem is i did not get the same result when i simulate the antenna using Hfss.i have already designed the antenna's structure exactly the same like the one that has been simulated by EM pro. This Antenna has been tested and and the results did not have major difference compare to simulation results by EM Pro.What bother me my results is totally different. Maybe i set up (radiation boundary,port,vias etc.) wrong because the structure (length,heigth.etc) is exactly the same.
Could anyone help me?

ThanksView attachment Project1.zip

 

[ferdows]

i think your simulation have some problem
1) wave port usually not suggested for antenna simulation in hfss
2) radiation box is not modify for this frequency

ferdows_j@yahoo.com

 

[hafizdaud]

thank for reply..
1) Which type of port should i use then?lumped port?
2) i already set the radiation box lambda/4 away from the antenna.What do you mean by the radiation frequency is not modify?

 

[ferdows]

yes u should used lump port
and radiation box is tangent to your port its may be make some problem in simulation (in x direction)

 

[hafizdaud]

hi,
i already used lumped port and the S11 look good but the 3d polar plot is not. it should radiate in all direction but my result is a little bit strange i think.



Anyone know why?

regards

 

[ferdows]

the pattern direction is related to antenna size and condition so your ground at X direction and pattern shows null at this side so it look true
i hope it be helpful