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 A simple question about PCB antenna? 

Last post Wed, Apr 9 2014 5:45 PM by ScottCad. 5 replies.
Started by Leeya 05 Apr 2014 01:48 PM. Topic has 5 replies and 609 views
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  • Sat, Apr 5 2014 1:48 PM

    • Leeya
    • Top 150 Contributor
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    A simple question about PCB antenna? Reply

    Have a question about PCB antenna in schematic. 

    I am doing a design which include a bluetooth PCB antenna.This pcb antenna is only a trace. I am wondering should I put a schematic symbol of antenna in schematic, and then make a footprint of PCB antenna? Or leaving it along in schematic, and routing a trace of antenna in PCB layout? Which is the right way to do?

     

    By the way, how to draw a trace in PCB layout, WITHOUT solder mask ? I want run a trace, with original color.

    Thanks 

    • Post Points: 20
  • Mon, Apr 7 2014 2:39 PM

    • Leeya
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    Re: A simple question about PCB antenna? Reply
    Still waiting for the anwser, Thanks
    • Post Points: 20
  • Mon, Apr 7 2014 5:58 PM

    • Roger BFS
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    Re: A simple question about PCB antenna? Answer Reply

    Leeya,

    Hard to respond to basic all-encompassing questions like this!

    There's no such thing as an antenna "just being a trace" even when it is.  An antenna design is complex and coupled with lots of concerns relative to reference planes and such.  In the end, the geometries and layout of an antenna trace should be defined as a component/footprint in my opinion, so as not to disturb it during hookup by the PCB designer!

    Regards,

    Roger 

    Roger Green - B F Systems, LLC
    • Post Points: 20
  • Mon, Apr 7 2014 6:01 PM

    • Roger BFS
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    Re: A simple question about PCB antenna? Answer Reply

    Oh, as a follow-up to your 2nd question.  At board layout level, you can just add shapes or cut-outs to the soldermask subclass where you don't want soldermask.  That class/layer is treated as a negative in artwork generation.

    Roger 

    Roger Green - B F Systems, LLC
    • Post Points: 5
  • Mon, Apr 7 2014 7:29 PM

    • Leeya
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    Re: A simple question about PCB antenna? Reply

    Thanks for you reply Roger 

    This is my first PCB antenna design, hope it will work

     

    • Post Points: 5
  • Wed, Apr 9 2014 5:45 PM

    • ScottCad
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    Re: A simple question about PCB antenna? Reply

     I think it would be better to create the antenna as a footprint with it's own symbol in capture.

    Antenna design at microwave on a PCB substrate can be a challenge, did you have a particular s11 goal for the band of interest ? 

    To remove mask from a trace so the trace is exposed you can draw a shape over it on your pcb mask layer.

    Scott 

    • Post Points: 5
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Started by Leeya at 05 Apr 2014 01:48 PM. Topic has 5 replies.