Dearv Azita Gudarzi,

Please see similar Questions trough ResearchGate, here is folowing links :

- How does one select a solution frequency in HFSS? - ResearchGate

https://www.researchgate.net/.../How_does_one_select_a_solution_...

- Can someone help with Gain vs Frequency plot in HFSS ...

https://www.researchgate.net/.../Can_someone_help_with_Gain_vs...

Also look at links and attached files in topics.

- Electromagnetic shielding electromagnetic simulation software - slth's ...

slthzi75.fotopages.com/?entry=4386361

- An 8x1 Wideband Antenna Phased Array - Semantic Scholar

https://pdfs.semanticscholar.org/.../45178f2f534b3af230de082810...

- Antenna diversity with opportunistic combining - DiVA

www.diva-portal.org/smash/get/diva2:617215/FULLTEXT01.pdf

- Ringdown Time Analysis of UWB Antennas - EM Lab

emlab.utep.edu/.../Ringdown%20Time%20Analysis%20of%20UWB%20Antennas.pd...

-hfss full book hfss 自学官方教材_图文_百度文库

wenku.baidu.com/view/0fbc76cc28ea81c758f57857.html

Best regards

thank you very much

but my exact question is about the hiding sweep in the interpolation method. so i cant see the gain vs frequency. just this. it is shown in the image that is attached. 

best regard

In my opinion it is enough to close this interface to the red square, this will allow you to see totally the curve of gain.

Best regards

Try Discrete sweep instead of interpolating, it will take some time to complete the simulation.

Instead of using Interpolating in Sweep Use Fast as sweep type.

Dear you can't because you have to use the Discrete Sweep. This is the only way to do.

No, you can not see gain in interpolation sweep...... Use fast and discreet to look the gain

You need to change the sweep type either to Discrete (more accurate but longer time) or Fast sweep.

Also after you change the type, you need to check the option of "save Fields"

You can easily plot the Gain vs Frequency using Hfss. Follow the following steps:

Go to HFSS-->Results-->create far field report-->rectangular plot

A new window will open up:

IN solution tab: select 'sweep1' or the name which you have given for the frequency sweep used for your antenna.

In Primarysweep tab: Select Freq, you can select on which frequency points you want to see the gain of your antenna by clicking at the corner of the tab in which 'All' is written,or if you will just select frequency it will by default take all the frequency points defined in your frequency sweep.

Click Families tab:

Theta: Choose appropriate value according to your antenna structure in which direction you want to see the gain of antenna.

Phi:Choose appropriate value according to your antenna structure in which direction you want to see the gain of antenna.

Then just plot and it will give you gain vs frequency plot as you wanted to see. IF you are having difficulty in picking the right values of 'Theta' and 'phi' at which to see the gain of antenna,post your file here and i will help you. IT is impossible to tell you without looking at your structure that which values of Theta and phi should be selected.

By looking at the graph you have attached, i am sure that you are not selecting the appropraite 'frequency sweep' in the solution tab,as a result HFSS is showing you the gain values on top of each other only at the solution frequency which in your case is 6GHz.

Hope it helps.