Problem hfss / measure- room simualation in hfss

[boss492]

room simualation in hfss

Hi,

I'm working on an UWB patch antenna, I have performed my structure using hfss but when I realise my structure I find it very different to practice I don't understand the real cause of this difference especially in the lower band so I repeat the simulation with CST to compare and I find that CST give me more better result than hfss and near to the measure. I have simulated the different scenario in hfss (lumped port, wave port with different dimension, design of the SMA connector, interpolate, change of central frequency) but always the same result. I attach the curves comparing this different results and I wait for your help because I can’t understand why hfss give me this difference??? What can I do to have the same result???

Thank you,

Best regards,

 

[Mustafa_Engineer]

Re: Problem hfss / mesure

Hi,

I am wroking on some UWB antenna designs , If you like i can check your hfss file.

please upload your HFSS projects.


regards

 

[boss492]

Problem hfss / mesure

What is the kind of UWB antenna in your work?? For me may it is a measure problem, I will repeat them in an anechoic room I verified every think in simulation but always the same result. In your simulation, you take a big radiation box??? Recently I take it lambda / 4 far away from every direction (lambda correspond to the lower frequency in my studied band).

Best regards;

Added after 1 hours 44 minutes:

I wait for your reply,

Have a good time

 

[westwind]

For wideband applications CST is much more preferred to HFSS.