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Mail Archives: geda-user/2016/08/01/12:37:17

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Date: Mon, 1 Aug 2016 18:45:34 +0200 (CEST)
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To: "michalwd1979 (michalwd1979 AT o2 DOT pl) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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From: gedau AT igor2 DOT repo DOT hu
Subject: Re: [geda-user] Wilkinson splitter - how to implement and use?
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On Mon, 1 Aug 2016, michalwd1979 (michalwd1979 AT o2 DOT pl) [via geda-user AT delorie DOT com] wrote:

>Dear Members,
>
>I need to design a RF board with some Wilkinson splitters on it. While the
>symbol of splitter is ready (rf/splitter-1.sym) and for pcb we have even a
>java generator
>(https://github.com/erichVK5/WilkinsonPowerDividerFootprintGenerator), I'm
>not sure how to use it. The splitter is just a few fancy tracks on pcb (plus
>a resistor) that in fact are all connected. In schematics however this is an
>element with 3 pins. In pcb I can not name the splitter pins "1", "2", "3",
>because this will give warnings about shorted nets. If I change schematics
>symbol (short its pins) there will be no warnings but all RF nets are
>reduced to one - that is not the case (all splitter input/output connections
>are lost).
>
>Is there a better/preferred way to deal with such RF components in gEDA?
>Thanks in advance,
>Michael Widlok
>

In pcb-rnd I see an ugly workaround for this: two footprints. One 
normal footprint with 3 separate terminals, so the netlist can ensure you 
connect the right things to the right places. Another footprint with a 
"track drawn of pads" (hack), marked as "nonetlist", placed on top of the 
first footprint. This would physically connect the three terminals, on 
copper, but because of the nonetlist flag pcb-rnd would still think 
there's no connection (DRC-wise).

Regards,

Igor2

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