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 Antenna Trace Relief 

Last post Thu, Jul 22 2010 10:08 PM by redwire. 2 replies.
Started by melview1 22 Jul 2010 09:46 AM. Topic has 2 replies and 1685 views
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  • Thu, Jul 22 2010 9:46 AM

    • melview1
    • Top 150 Contributor
    • Joined on Wed, May 20 2009
    • Shakopee, MN
    • Posts 44
    • Points 815
    Antenna Trace Relief Reply

    Using Allegro OrCAD PCB Designer v16.3.S009

    I have a 2.4GHz impedance controlled antenna trace that has a ground pour around it.  I would like to pull back the ground pour at least 30 mils from this antenna trace.  Is there a property or something in the net or trace that I can set such that it will automatically do this?  I've manually created voids to the desired relief distance in the past and have decided that this can't be the best way to do this.

    Thanks.

     

    --Mark

    • Post Points: 35
  • Thu, Jul 22 2010 9:09 PM

    • girish
    • Top 25 Contributor
    • Joined on Wed, Jul 16 2008
    • Bangalore, Karnataka
    • Posts 241
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    Re: Antenna Trace Relief Reply

     Use spacing constraint or constraint area.

     Regards,

    Girish Kumar 

     

    • Post Points: 5
  • Thu, Jul 22 2010 10:08 PM

    • redwire
    • Top 10 Contributor
    • Joined on Thu, Jul 17 2008
    • Allen, TX
    • Posts 875
    • Points 13,480
    Re: Antenna Trace Relief Reply

     LIke girish says, use a spacing constraint.

    When you set it up in the constraint manager you can assign the antenna net a name like "RF" and then state a rule that all nets shall stay 30 mils away from RF.  Or you could be more specific and make a rule for ground and then one that states that RF to ground and that spacing alone shall be 30 mils.

    Take a look at the constraint manager guide to get started...and then post up if you have more questions.

    • Post Points: 5
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Started by melview1 at 22 Jul 2010 09:46 AM. Topic has 2 replies.