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Eagle question - separating wires and polygons of same net
Eagle question - separating wires and polygons of same net
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Old 23rd November 2017, 06:52 PM   #1
BuckarooBanzai is offline BuckarooBanzai
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Default Eagle question - separating wires and polygons of same net

I'd like to have a ground plane cover one side of a board as a shield, but still run actual ground connections traces for a star ground. I've tried lowering the rank of the ground polygon, but the wires still get incorporated into the polygon.

Is it possible to have traces running through a polygon of the same net while still remaining separate? I hope this question makes sense.

Last edited by BuckarooBanzai; 23rd November 2017 at 06:55 PM.
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Old 23rd November 2017, 07:07 PM   #2
rayma is offline rayma  United States
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Quote:
Originally Posted by BuckarooBanzai View Post
Is it possible to have traces running through a polygon of the same net while still remaining separate?
The shield plane should not be directly connected to ground. Define the plane as something else,
like a power plane. Then use a component jumper (not a via) to connect it to the audio ground.
Make sure there are no "islands" of shield plane left floating because of the traces cutting it up.

Last edited by rayma; 23rd November 2017 at 07:35 PM.
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Old 23rd November 2017, 07:09 PM   #3
JPS64 is online now JPS64  Germany
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Eagle question - separating wires and polygons of same net
@rayma confirmed, only solution.

JP
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Old 23rd November 2017, 07:48 PM   #4
BuckarooBanzai is offline BuckarooBanzai
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Awesome, thanks a lot guys . I've used a solder jumper a couple of times, but was hoping for a more elegant solution.
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Old 23rd November 2017, 10:32 PM   #5
Phloodpants is offline Phloodpants
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Another option. Pour one big ground plane, and divide the board up into sections by drawing moats with wires in the trestrict or brestrict layers.
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Old 23rd November 2017, 11:55 PM   #6
nigelwright7557 is offline nigelwright7557  United Kingdom
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Not sure how Eagle works but my software connects the copper pour to a net name which the user can define. If I don't want it connected to a net I just name the copper pour net name "unused"
I always connect copper pours to GND net. This helps protect audio signals from interference.
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