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=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=HlhgxtgZMskARJoYzmPjrss3IcFRbPguFkU1ya8erno=; b=hIINiNmBOaJpXuv7+ifOsPuvOIkzVKdFJ+TtSS11rL+Cr7Q5pBHlnJm4gbyNqjdW0i NiwdgIhd8+pxlb/D8NI7RSMS1g+FPRlSg4MiOEjfCz15n+GLTtJnlPnxbFpEDVHgM3AK eorOyYv8HVWzpIAAwjmnA38M43KfeLg3NKoELZeyAgIgiLztNT4DHNUWocnMlfbWSlUW ivLMdF2ajptIrAWACkUr0NbbuExyQuFOFOBncBAK9boQNLhJo4/KpNC78rb1x+PPhpR4 6JY8ZFQMmDRLUBA2WDJoFTIiWvZrpKY82O8b7mA+sBY6IGYLE0bSth1QovkTm+zuP53G zCrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=HlhgxtgZMskARJoYzmPjrss3IcFRbPguFkU1ya8erno=; b=tCJ2uhh+zpdy4hgFhsNocccA8uhqfMCnhiPRE0oURQDh6shIWsivgiI+c1TTZeiLrN ZXyj+WMeRSVyL9IV4RiPvgijitvsURJ5GUVh9An7T8yc1U3yVPFrT0CQJlRsoqAG15UG lEMoBjYdG4D8RVSJsD6CDa2t5Iwp23lxAoNLT7OvZxhX+sR5jT5Z9+00vincvJUycPwz BHUXle+DudJfmE9Qgf5agc/wyHL5l096qZzXWThfet0sW7acri+/pTiQwqg6KccONTuk oOvYMw/DTfdXE2fZHOgmTivNCw2VX8FeKdHqWjBfu92gjqc8a3Ju15kaFgFJfymbcyX8 1NXA== X-Gm-Message-State: APjAAAXDqLh+zMAVZP+SWk4iZWYosT2HJ6OhOjX/YA9SPOk7M875APws 5pgsIeV+d49jHznzbRi0yGSvjA79A3aBlMrIWLFXcw== X-Google-Smtp-Source: APXvYqw0TyUsLCZAWCqn4oHMv+uN+T9juW9pArm0vlVGdvs35zaoyvy0ec+hT/eZyxsFUt4FOCTU0r65ip3TLQin8sg= X-Received: by 2002:a5d:8713:: with SMTP id u19mr4850107iom.117.1574932905683; Thu, 28 Nov 2019 01:21:45 -0800 (PST) MIME-Version: 1.0 References: <31bdd536-fe1c-86fe-8edd-34de85a2e055 AT neurotica DOT com> In-Reply-To: <31bdd536-fe1c-86fe-8edd-34de85a2e055@neurotica.com> From: "Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" Date: Thu, 28 Nov 2019 04:21:52 -0500 Message-ID: Subject: Re: [geda-user] Re: 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 Thanks Dave! On Fri, Nov 22, 2019 at 11:44 AM Dave McGuire (mcguire AT neurotica DOT com) [via geda-user AT delorie DOT com] wrote: > > > This is amazing work! > > -Dave > > On 11/21/19 5:09 PM, Evan Foss (evanfoss AT gmail DOT com) [via > geda-user AT delorie DOT com] wrote: > > Hi geda-user, > > > > It's been a while since this thread happened. I just wanted to point > > out that we built it. > > > > Here is some documentation: > > http://repo.hu/cgi-bin/pool.cgi?cmd=show&node=s_param > > (i will write more later) > > > > Here is the official announcement: > > http://repo.hu/cgi-bin/web_mail_arch.cgi?mlist=pcb-rnd&cmd=show&id=3539 > > > > Some additional documentation will need to be written for things like > > meshing, and more specific applications like signal integrity. > > > > -Evan > > > > On Fri, Aug 26, 2016 at 6:40 PM Evan Foss 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. > >> > > > -- > Dave McGuire, AK4HZ > New Kensington, PA -- https://github.com/evanfoss -----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-----