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Need help on Simulating a 60GHz F-form Antenna by HFSS - RF Cafe Forums

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sageme
 Post subject: Need help on Simulating a 60GHz F-form Antenna by HFSS
Posted: Mon Jul 28, 2008 3:46 pm 
 
Lieutenant

Joined: Wed Jul 09, 2008 11:51 am

Posts: 2

Location: Chicago

Hi all,

I am simulating a 60GHz straight F-form antenna by Ansoft HFSS. I use the low-loss Rogers material(loss tangent is 0.0021) as the board material. This F-form antenna resonates around 61GHz(S11) . However, when I tried to get information on radiation efficiency, it turns out that the radiation efficiency is greater than "1". I don't know what's wrong with my modeling and how to improve it. Could anyone give me some advices? Thank you very much! Welcome to contact me via: hopefully81(at)gmail.com

Kevin

_________________

Pursuing perfectness pushes us to progress


 
   
 
imodelit_moderator
 Post subject:
Posted: Tue Jul 29, 2008 2:03 am 
 
Captain
User avatar

Joined: Wed Jun 20, 2007 3:01 am

Posts: 22

Dear sageme,

Check your radiation box size, it should larger and enclosing your structure. Check the operating frequency, in your case, it should be at least 60GHz. Could you please send a figure for your structure model on HFSS?

Best Regards,

imodelit Moderator


 
   
 
sageme
 Post subject:
Posted: Tue Jul 29, 2008 12:39 pm 
 
Lieutenant

Joined: Wed Jul 09, 2008 11:51 am

Posts: 2

Location: Chicago

Hi imodelit_moderator,

My radiation box is at least quarter-wavelength away from the radiating structure. The solution frequency is set to 61GHz, while the frequency sweep range is from 50GHz to 75GHz. From the S11, this F antenna really resonates around 61GHz. By the way, I don't know how to post a figure here....

Thank you very much!

Kevin

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_________________

Pursuing perfectness pushes us to progress


 
   
 
imodelit_moderator
 Post subject:
Posted: Wed Jul 30, 2008 1:53 am 
 
Captain
User avatar

Joined: Wed Jun 20, 2007 3:01 am

Posts: 22

Hi Kevin,

Could you please send me your simulation file on marwah.shafee@imodelit.com. Thanks.

Best Regards,

Marwah Shafee

imodelit Moderator


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