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=Vpy5Nr1o2FelxeWhgeK205TUFrcqK/u8avFRrHoHDNk=; b=PutNjp9BehKviHTqqU9D2xlEOsG1+pG9z6uwXBe0xn+qBiEPdpCwkNgNDIFKuvIT4X 87kwxc4dXWuqKPTiQwwZPCLfTPH4uY0HA9J1jHFb01acbvepFQi3yosecoDJJjR0o6Zi qgTIjISrAwle0bOK/mondwwVcoO50burpTpFjDTceaEOkq84xD4PQ1o7FpknG1f3Jf+u eXFmk5lu8gPh8p7vSByRI6OudHvxtdJ0Uht+OX9jqds14JNNyLWHgx/31FqYCimHlsPT sAcoymF7JdcfABcgMMrN1Y2eupfiCrQJDPg0FEHfyzhdpHT0ogL3x0me4uIO9S48fUvA FptA== 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=Vpy5Nr1o2FelxeWhgeK205TUFrcqK/u8avFRrHoHDNk=; b=MXBN1fFCvYTyYhH9yxI/iNXT9LhJB2LGVftWl5Nyvlcf4wDsfLLLb4z6YdD54QC1uM l+knO+EOsbbytDZHXvMVaxDnZVlAS0uhf0coNl8Sj3tvwwNbysxNkP/y3B/lEKifYJI5 arDecr7DjTrZSCwkY/1s0iXigUeqsvqQX+w88Og24oXX9ba2agRHUTR26a56o2DUfUgU TXCpxn315EDtfOeDMpGL3CCjxCC3d0Ct+LnZ3bX2kn6dBb21xLb+eo6+ypelYnf/MV+W Yk0qOMsNeCez1Pi0SoD4MVVw9KH3KtUGlcwoC5nUtc4ScZGLu/iIacZuMiT/dfdBG2F6 xZ0Q== X-Gm-Message-State: AE9vXwN+bpM8zU4AfYIc8Z5ky7Bscp8nqu9l39/lUw13rkVy5QvEei0eBbCY7EpQ/8CtfpAWriNtarbQG8Qf/g== X-Received: by 10.25.163.132 with SMTP id m126mr2306684lfe.56.1472244809394; Fri, 26 Aug 2016 13:53:29 -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 20:53:28 +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 think we should have that any way but actually direct export from pcb to this format is more viable. 1. We don't want to export the whole geometry for most cases just some area of the board users select 2. We might want to composite packages into the geometry we hand openems. at microwave frequencies packaging on chips adds insertion losses and etc and the chassis construction can effect things too. For this reason I am curious if we should actually go from pcb to another tool that has a 3d geometry kernel to add the other parts. 3. Hyperlynx has as far as i can find no public documentation. We might try writing the author of the conversion utility but even still can anyone think of a tool they want to use pcb with other than this one that uses hyperlynx? > 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-----