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2.4GHz PCB antenna design

Discussion in 'Electronic Design' started by markp, May 24, 2007.

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  1. markp

    markp Guest

    Hi All,

    I'm looking for some information on how to lay out a 2.4GHz antenna on a
    PCB. Anyone got any good links?

    Thanks!

    Mark.
     
  2. Charles

    Charles Guest

  3. Guest

    Check out Microchip's application notes for their 2.4GHz ZigBee
    transceiver, the MRF24J40. They have excellent documentation about PCB
    antenna.
    Also, look at Chipcon (now TI) cc2024 app notes. They have great
    documentation also, and I believe they even provide gerber files.

    -Goldscott
     
  4. Guest

    It's actually cc2420, sorry.

    -Goldscott
     
  5. markp

    markp Guest

    Thanks, I'll have a look.

    Mark.
     
  6. markp

    markp Guest

    Thanks for the responses. For others looking for some data I found this very
    useful document:
    http://www.numatechnologies.com/pdf/foilantennas.pdf

    Mark.
     
  7. AJ

    AJ Guest

    I agree with the previous posters, I found a lot of the information
    provided by Microchip and Chipcon very handy. After playing around (and the
    calculations provided by chipcon and microchip confirm), I found that a
    wider track width makes a big difference. It raises the Rloss which in turn
    increases the radiation efficiency.


    Regards


    AJ
     
  8. markp

    markp Guest

    Thanks for that, I'll bear that in mind when I prototype it! As an aside,
    what's the easiest way to test the gain of an antenna (without the use of
    fancy RF test equimpent)? Is just reading the reported receiving signal
    strength of a module at varies distances away from it a representative test,
    e.g. are they accurate enough for that purpose?

    Mark.
     
  9. Joel Kolstad

    Joel Kolstad Guest

    Only if you have a large, open field (large enough to get out into the far
    zone of the antenna... going, say, 10 wavelengths out for measurements should
    be good). You'll get pretty meaningless results if you conduct your test in,
    e.g., a home or office building.
     
  10. markp

    markp Guest

    Actually, I found this Googling:
    http://www.mrx.com.au/wireless/TestGear2_4ghz.htm

    Looks interesting...
     
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