Learning Forum

[Acherme]

Hi everyone,

As the title says, I'm trying to design a NFC antenna. I did all the calculations on Matlab and now I must simulate it in HFSS. Here is what I did :

• Created the antenna model and imported it in HFSS
• Assigned the material "copper" and the boundary "Perfect E" on the antenna
• Set a lumped port
• Created a vaccum box around the antenna
• Set a Lumped RLC with a 50pF capacitance (my real antenna will have a 50 pF capacitor)
• Set the solution frequency to 13.56MHz, a number of passes to 20 and maximum delta S to 0.02.

The antenna is supposed to work at 13.56MHz. In order to see if it's well tuned, I wanted to check the S11 parameter and i got this :

Capture.PNG

[Praneeth]

nPlease use upload image option to upload images, we cannot access the attachments in the forum.nKindly provide the images for your setups for model, port, lumped elements and boundaries.nBest regards,n

[Acherme]

Hi pmunaga and thanks for your answer.nHere are the images of my setup :nnnI've just noticed that when I do the simulation, I get this error message (I don't konw if it's relevant) : nnn

[Acherme]

Hi pmunaga and thanks for your answer.nHere are the images of my setup : nI've just noticied that when I start the simulation, I get an error message (I don't know if it's relevant) : nn

[Praneeth]

nDid you verify your results when there is no lumped capacitor in your model?nRegarding the solutions warning which you have posted, it is just a warning indicating that the previous results have been invalidated because of the changes you made to your model.nBest regards,n