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The copper thickness-->affect the PCB antenna and RF trac - RF Cafe Forums

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wccheng
 Post subject: The copper thickness-->affect the PCB antenna and RF trac
Posted: Wed Nov 16, 2005 8:56 am 
 
Captain

Joined: Tue Nov 08, 2005 10:13 pm

Posts: 8

Dear all,

For the original design, the copper thickness at toppest and lowest PCB is 1.5oz. If we change it to the 0.5oz or 1.0oz thickness, what were the effect for the PCB antenna and the RF trace path? (The PCB antenna and the RF trace path are on the toppest and lowest PCB) Do I need to re-design the PCB antenna dimension and the width of the RF trace path after I change the thickness of the copper?

thanks

wccheng
 
   
 
tbone
 Post subject:
Posted: Wed Nov 16, 2005 12:06 pm 
 
Captain
User avatar

Joined: Sat Aug 30, 2003 6:42 pm

Posts: 5

Hey Cheng, copper thickness will not make much difference. Take a look at the effective trace width and and substrate height equations and you will see trace has a very small effect. Nevertheless, you will probably want to adjust it to get maximum performance, particularly when allowing for ecthing tolerances.

Image

Image

Image

Hey! the pictures worked!

Good luck to you.

tbone
 
   
 
wccheng
 Post subject:
Posted: Wed Nov 16, 2005 9:06 pm 
 
Captain

Joined: Tue Nov 08, 2005 10:13 pm

Posts: 8

How about the PCB antenna?

thanks
 
   
 
Joel-Tang
 Post subject: for antenna
Posted: Mon Dec 12, 2005 10:58 am 
 
Lieutenant
 

Joined: Fri Dec 09, 2005 10:18 am

Posts: 3

The answer should be the same for the antenna.
 
   
 
Honza
 Post subject:
Posted: Tue Dec 13, 2005 2:32 am 
From my experience,

the effect of copper thickness is negligible. Go and build your antenna...

H.
 
  
 
UWB_antenna_guy
 Post subject:
Posted: Tue Dec 13, 2005 12:04 pm 
 
Colonel
User avatar

Joined: Tue Aug 09, 2005 1:07 pm

Posts: 28

same here. If you model it in HFSS, you see barely any difference between 0.5 and 1.5oz copper traces. Also, you can safely model the trace with an infinitesimal sheet.

FYI, I have seen this for frequencies from 1-6GHz...

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