X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com X-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:subject:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=CrxtuuAeCi45HzKFIZyXYKHMKM+3xiElq4C73G7IM+o=; b=gtMBUmRHVi+w+jgHk/DxVqWKI/Kh1Gypau3bInBVSmjo3XANG7B9irmD9K8fdQ3hco 5+yAghDZ4N0AMetE243MTZlAp1gQn0p/kMPPqj40mNTfkN7PlBbMjyiMjuUCuzPvUMju jUvfjP0ZqyHG6WPX08yU5tCFDVeKQ5loNSEiMipaKGs54cu8fkgzsbfUjRBW2Q4Bxkm4 UxcNZq62EPnfCk1Ktd8rzdFi+Dgs9KRBeb/K2TFZzpPGGW9eFze52pEQOi2zJ+btfouU Kvl2utESuyCFjVQ6mslLdlGarfRNC4tbZl0xCnKSH/g1Ahx1dDSXlFua4PGw+OY5VYCU WdoQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=CrxtuuAeCi45HzKFIZyXYKHMKM+3xiElq4C73G7IM+o=; b=W6WDvpVsU1Oomwusu7PTR6FScBiTTEpuAeHK6xbD6vbQkgbM/kEiPZ5FWmOrSmIdXu W8gEV11qczaMXN032aQMWwa656fpY8TYjumgyHRvTu9yBBQ20T1765s+yZavwLWXyIGY L3I1Qexvw/cEcHw8T+Yy5+Tm+KVvHhsRy0+7HdSE1angBE1LUn/daxx0UGvbkQ8aDS9i jTmWrZ7pQoodwcS5NlP1Q4/chOiqaim7mprQyYwXoUIRp5HGUtAuQrmOYQvS5EMtvrWF ZO1IybEwLp9wYcn+0MPbijxe4qJhqLhWLXvl1/kQ68iQSKI+SrpqbCC6AHTCtS7p8eXu wINw== X-Gm-Message-State: AE9vXwMptup0U7C4wPDyEKu7MSe8xKpKBg0L/5g5htcKN1dmkRk7pWwTH6GDhZmeJYyljg== X-Received: by 10.194.118.132 with SMTP id km4mr9896693wjb.158.1472660086101; Wed, 31 Aug 2016 09:14:46 -0700 (PDT) Date: Wed, 31 Aug 2016 18:14:41 +0200 From: "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" To: geda-user AT delorie DOT com Subject: Re: [geda-user] Microwave PCB layout simulation or How to eat all your processing power in 3 easy steps Message-Id: <20160831181441.fc7e44ad941a2941c8757624@gmail.com> In-Reply-To: <20160831061012.GA6882@recycle.lbl.gov> References: <57C09C3C DOT 7020708 AT xs4all DOT nl> <1802d6ac-d9d7-684e-ef8b-2061e2557bcf AT neurotica DOT com> <0f623d55-c654-88af-ca54-52bb385f51e0 AT neurotica DOT com> <20160831041644 DOT GA6695 AT recycle DOT lbl DOT gov> <20160831061012 DOT GA6882 AT recycle DOT lbl DOT gov> X-Mailer: Sylpheed 3.5.0beta1 (GTK+ 2.24.25; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk > On Wed, Aug 31, 2016 at 04:26:05AM +0000, Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com] wrote: > > On Wed, Aug 31, 2016 at 4:16 AM, Larry Doolittle > > wrote: > > > Crosstalk, VSWR of microwave circuits and high-speed serial routing. > > > They are hard problems. Even with ideal software, getting good data on > > > a PCB process can be tough. Lots of people make test boards for their own use, > > > and then hope (and check) that the manufacturer doesn't change the process. > > Ok. Do you have a background with FEM and do you think it is worth pursuing? > > Yes, some background. Urmel, Superfish, meep, S parameters, > waveguides, series solutions. > > Worth pursuing, yes. I can't promise much time of my own. > And I recommend trying to keep expectations low, at least at first. I have taken a course in partial differential equations but unfortunately I passed the course after registration went out though it make no practical difference. I however think other simpler tasks are more urgent, for example possibility to build pins/footprint for the ordinary drawing primitives though the old style via/pin/pad could stay as a macro.