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PCBs, copper pours, ground planes, and you

(lcamtuf.substack.com)
284 points surprisetalk | 1 comments | 30 Jan 25 04:33 UTC | HN request time: 0.204s | source
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pcdoodle ◴[30 Jan 25 16:42 UTC] No.42879480[source]▶
Without a ground pour, isn't each trace basically an antenna?
replies(2): >>42881652 #>>42883397 #
1. SV_BubbleTime ◴[30 Jan 25 23:45 UTC] No.42883397[source]▶
You want a ground opposite of the signal, next to it doesn’t count.

When you understand that the electrical field of your signal is in the fiberglass not in the copper, you’ll understand why.