PCB trace antennas seem impossible to use
106 3
Kimmo Lehto 1 week ago
This has been asked several times but I haven't found an answer that actually solves the problem. Take any of the user contributed PCB antenna traces, such as [https://easyeda.com/component/c865dcf6cba443268e2577636385f1f9](https://easyeda.com/component/c865dcf6cba443268e2577636385f1f9) There does not seem to be any way to actually run a trace from the pads to a component without selecting "ignore" from the "routing conflict" menu: ![image.png](//image.easyeda.com/pullimage/D48gsXg1d1nbxn6OnbgOqlQs8HZ9mESYo2Zw6tC2.png) Without that, EasyEDA refuses to connect a trace to the pad: ![image.png](//image.easyeda.com/pullimage/cXsBzYAtBUajjXAP6NYdvwcHnGJCgQfPEhZBgWFG.png) I think EasyEDA needs a way to mark a trace or a solid region as a kind of "black box", to be ignored by the router as a connection. Another problem with the trace antennas is that you can't make a pad without exposing copper, except by using a "hack" and use a negative solder/paste mask extension value. You don't usually need a solder pad for your trace antenna, you just need a pad so that you can route a trace to it to get rid of DRCs. The antenna in the example also seems to generate a bunch of DRC errors for clearance and track width and I don't know why. I think it's the solder mask or the pad that is placed on top of the antenna trace. ![image.png](//image.easyeda.com/pullimage/5BzQX8Nk6Lc9x38Z47eyEMmv4CIlHxJUo5Dk0Upq.png)
andyfierman 1 week ago
I'm working on a way to do this but have hit a snag. More if I can work round it. In the meanwhile, the antenna you have used as an example has a hidden problem. The original creator has placed a 0.1 mil wide top layer track all the way round it, presumably as a guideline for drawing the copper region. This immediately causes a number of DRC errors. You can delete it by temporarily cutting the rest of the top layer copper, doing ctrl+A then delete. Then paste the cut copper back as one group. But that only removes some DRC errors,  not all.
andyfierman 1 week ago
This Bug Report explains the issue: [https://easyeda.com/forum/topic/Inconsistent-connection-to-pad-on-single-numbered-multi-padded-footprint-40071cd5cf5a478cac7be7d4334a02a1](https://easyeda.com/forum/topic/Inconsistent-connection-to-pad-on-single-numbered-multi-padded-footprint-40071cd5cf5a478cac7be7d4334a02a1)
Kimmo Lehto 4 days ago
Thanks for the tip!
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