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=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=qfT/lHH7c9Ds+/2DVdRVGZrstGf68oz2I/Mlk0zwv1A=; b=JT8TZXHr7S/5ouUoXpa+kbJtKgKZIFjVx5XIRl/ONWYPY0049D9z5dFVGo1McEmPEn eyEmrDX2em/Beorsrx2JX2DD0HaZfLQUayDg8b2sVvQlxSKz4qPSpGiz621ldWheheup n2zonE0H/L7ihdsn8tFh4EBaSD6GisjB15AA4aMEE8Q02BcxVfix07SjwKOvONghxjdm pPV16lL2ctOQM3+6a2qQECt7sE4hXC6+kgqHefX2YvlDdZdU1Am/pXGhm1c3kQK4RELG jjAvo5fmQYEsnb+8qiWRSD7Z1/NTwwkLy6v8ukAp+IH/M6WNoMJccRrowgszgnpoCos9 XKQQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=qfT/lHH7c9Ds+/2DVdRVGZrstGf68oz2I/Mlk0zwv1A=; b=dRH7bgvBI/TBELsAn7RmYFyvw3P1a2pWgJPEf/ypW/b+WDl3PTyb3NHb6dMeYPIGZx 491c8SCdAjvkJ4serQlXUkqKIpfB2WP8w875f5/Yx3KHZyJwned8Jg1A5MtyITt4C3o4 L9f4rbwma30FCDE9fuuoAYViMDQEUdbQIrR2IqObq4TwAnIdamTb48KPm4E4UukpbzSt VEpSNAszKhnsi+1EEkQQcaeA9rDQL9Eg7xIVpST+FuiVqHeXaAmcSSoyi71uWe7hQz+L SKzHQRoGiCTMm8FtgGYnFvNVcjfoeVZVHtMcAMXAl2NqypBCJszBR/+Ms2MbGnzAdyRl VLSQ== X-Gm-Message-State: AE9vXwNrSsnfG7/lOA6uCiHFrjkQoDVsbcX4ZG03IfzdAfyiPVCA4v/cv3ESH3im7O3VJ42Rtz1D6mORzlReng== X-Received: by 10.25.82.202 with SMTP id g193mr2241816lfb.141.1472244966157; Fri, 26 Aug 2016 13:56:06 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <57C09C3C.7020708@xs4all.nl> References: <57C09C3C DOT 7020708 AT xs4all DOT nl> From: "Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" Date: Fri, 26 Aug 2016 20:56:05 +0000 Message-ID: Subject: Re: [geda-user] Microwave PCB layout simulation or How to eat all your processing power in 3 easy steps To: gEDA users mailing list Content-Type: text/plain; charset=UTF-8 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 Fri, Aug 26, 2016 at 7:45 PM, Bert Timmerman (bert DOT timmerman AT xs4all DOT nl) [via geda-user AT delorie DOT com] wrote: > Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com] wrote: >> >> So a while back there was a thread titled "[geda-user] Wilkinson >> splitter - how to implement and use?" >> >> I *hated* that we didn't have a good answer for that. I spent a lot of >> time looking at FEM (finite element modeling). There are a lot of open >> source FEM solvers that are open source. Too many really because >> people keep writing new ones to full fill phd thesis requirements. >> >> The FEM we care about is called FDTD (finite-difference time-domain) >> aka Yee's method. I made a list of all of them. Removed the ones that >> are not maintained. Weighted them based on how close to our intended >> use case the projects were and bumped down ones that were basically >> only used by the universities who wrote them. It left 2 options. I >> really favor OpenEMS for a number of reasons. For one MEEP doesn't >> seem to have any kind of email list or forum and OpenEMS does. For >> another MEEP seems to mostly be used by people who are doing things >> like designing CCDs and other optics (hey John Dotty ever used this?). >> OpenEMS is mostly used by RF people and has examples done that use PCB >> layout. >> >> To see what I am excited about >> http://openems.de/index.php/Tutorial:_Microstrip_Notch_Filter >> >> http://openems.de/index.php/Tutorial:_Importing_with_hyp2mat#Calculating_the_step_response >> >> OpenEMS >> http://openems.de/start/index.php >> >> MEEP >> http://ab-initio.mit.edu/wiki/index.php/Meep >> >> PS: I looked for a Method Of Moments (mom) solver and there don't >> appear to be any which are open source and actively >> developed/maintained. NEC2 is nice but it is just free as in beer. >> >> >> > > Hi Evan, > > So basically you wish for a Hyperlynx exporter for pcb ;-) I was hoping for some wisdom from the crowd too. I am not a microwave dark artist and we have a resident phd in physics who might have a thing or two to say. Igor2 and I were talking about it last night. We got really excited about FEM solvers but does anyone here really want / have the ability to use this? > Kind regards, > > Bert Timmerman. -- Home http://evanfoss.googlepages.com/ Work http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/ -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v2 mQENBFYy4RYBCAC183JomLtbdAlcKiaPDoVHq52LDmVmH75aiEc69m7YxDt54/ai VtYCAobbGVIyn3Hlz3uhF6LnPl/6Lm1VdnCfpwu3KQhCO6ds10ow2C30X4ohCqOd hCVg5C+ILmQkEffFrFODy3ji+PYTF4pADvHCWsTMv0hf0llwFOJsBCK6cl02IffE JPqy4PjM1nZ9HpzT84JBaG/4OGvTZ8SQ2yFUl265jagvygPTf88H1xpZHH1r8dB1 stjUHLmPH8AOyDgKxFchgGeDc3p/vJtgDDIXAFfDXG0NSRovLmtaQdGxe47Zf/go bXiEM7YL2WqQe5zfEA919JxkEwlDKYniOSVzABEBAAG0N0V2YW4gRm9zcyAoVGhp cyBpcyBteSBwdWJsaWMga2V5LikgPGV2YW5mb3NzQGdtYWlsLmNvbT6JATkEEwEC ACMFAlYy4RYCGwMHCwkIBwMCAQYVCAIJCgsEFgIDAQIeAQIXgAAKCRCIpQTcE8nN bbBaCACAm8pU5lG1ev2Fsw68Axtcl57SJrYieqX96c3YuYH9JpqMqJRnd9nDKw9X tQuvuH7tUk0VbOaDqReOYJVI/4c5wb9AaOFp6K2DUcupq6XhgXpvz3HzoPwjAdIj XuQzdRUx5+innTJrSkGuBYW/CZ2zqEx4xfLlq4rO0hoTUMR8QVp2cCrkw6BT0m86 APIw/ZnjoxM8IEzr7MxfRIg3qpzrZk28rmhx+k78Jyk61UhwcCPGIm/pjUopTwYJ 3YBdRB2cYD2aN7A1JVf5cRmSQYooHBGpH0kYvomGk97PKqypVuJ7OpG9xM58wUcC qUVt9hKlePLzP8csYjt8onqI7qIIuQENBFYy4RYBCADlH8spG3WkCx62vB5mr5Z0 SCDd/RcyA4A5y5EOj5KurQkrSWpgi9Ho1yKruMJ6blQR2qkc66KqH9pnXDm/ZI1M K/wdW3ngETxBmXoozzFMT89aEWIVR5/PFodWK1elekE9iJxACuR98Zg2QttTD3x8 A9w8VEyMLOXcDTrPFpHegMKswFBg5iuMulAdXAoGejWTI3n+qKFpabHm2Lfs6wjk 5rjucpTdeFK6UeWF1xAvNxXibuu5BlGwv53930qIXRwO/Gn2Rh5DXWxKU2fEIme/ xgQQmIsDeUoWbfybdjw/x7Q0LW4mINiLDQcGHHRQKFIxbAJCT3USPLGh5xwE9/Er ABEBAAGJAR8EGAECAAkFAlYy4RYCGwwACgkQiKUE3BPJzW0uYAf9Hf30n8tM3mR2 Zo6ESE0ivgdgjaJtAWrBUx7JzAzPjBnBOlNnu5Y9lVEqetvUPH6e3PvaHYUuaUU8 0HwxuKBW9nUprgV6uIu1DZmlcp+SxpbuCy7RDpNocRLNWWFMaYYzznmTgfnTgD4D gCq8Mf1mcfrluTkOAo+QNqbMfl1GISClopRqxVuAo59ewgMnFujwgd8w12BwWl24 CzqOs5HqcUslePj+LzcjSNgVCklYwKl+0dsb/fctMOCtHodwqm2CBJ+zydvNmYkD fxda/J91Z1xrah5ec++FL0L4vs+jCiIWJeupJFKlr1hCMZiiGH7W554loK5l4jv3 EY347EidAw== =Ta4p -----END PGP PUBLIC KEY BLOCK-----