Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Thu, 12 Aug 2021 16:28:23 -0700 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 17CNLVtP024185; Thu, 12 Aug 2021 19:22:04 -0400 Received: from outgoing-exchange-5.mit.edu (OUTGOING-EXCHANGE-5.MIT.EDU [18.9.28.59]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 17CNLTR9024182 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Thu, 12 Aug 2021 19:21:30 -0400 Received: from w92exedge3.exchange.mit.edu (W92EXEDGE3.EXCHANGE.MIT.EDU [18.7.73.15]) by outgoing-exchange-5.mit.edu (8.14.7/8.12.4) with ESMTP id 17CNLT3x013739 for ; Thu, 12 Aug 2021 19:21:29 -0400 Received: from oc11expo17.exchange.mit.edu (18.9.4.48) by w92exedge3.exchange.mit.edu (18.7.73.15) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Thu, 12 Aug 2021 19:21:26 -0400 Received: from oc11exhyb3.exchange.mit.edu (18.9.1.99) by oc11expo17.exchange.mit.edu (18.9.4.48) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Thu, 12 Aug 2021 19:21:29 -0400 Received: from NAM10-BN7-obe.outbound.protection.outlook.com (104.47.70.102) by oc11exhyb3.exchange.mit.edu (18.9.1.99) with Microsoft SMTP Server (TLS) id 15.0.1497.23 via Frontend Transport; Thu, 12 Aug 2021 19:21:28 -0400 Received: from DM5PR21CA0059.namprd21.prod.outlook.com (2603:10b6:3:129::21) by SN6PR01MB4350.prod.exchangelabs.com (2603:10b6:805:e0::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4415.15; Thu, 12 Aug 2021 23:21:28 +0000 Received: from DM6NAM11FT034.eop-nam11.prod.protection.outlook.com (2603:10b6:3:129:cafe::51) by DM5PR21CA0059.outlook.office365.com (2603:10b6:3:129::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4436.5 via Frontend Transport; Thu, 12 Aug 2021 23:21:28 +0000 Received: from mai.hallikainen.org (74.208.193.200) by DM6NAM11FT034.mail.protection.outlook.com (10.13.173.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4415.14 via Frontend Transport; Thu, 12 Aug 2021 23:21:27 +0000 Received: from mai.hallikainen.org (localhost [127.0.0.1]) by mai.hallikainen.org (8.14.4/8.14.4) with ESMTP id 17CNLRNJ013831 for ; Thu, 12 Aug 2021 16:21:27 -0700 Received: (from apache@localhost) by mai.hallikainen.org (8.14.4/8.14.4/Submit) id 17CNLRgg013828; Thu, 12 Aug 2021 16:21:27 -0700 Received: from 70.177.184.232 (SquirrelMail authenticated user harold) by mai.hallikainen.org with HTTP; Thu, 12 Aug 2021 16:21:27 -0700 From: Harold Hallikainen To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Thu, 12 Aug 2021 16:21:27 -0700 Subject: Re: [EE] Modeling radio propagation from antenna mounted in metal robot? Thread-Topic: [EE] Modeling radio propagation from antenna mounted in metal robot? Thread-Index: AdeP0b6X+F7tH93WQVKAFa9/QT6Sbw== Message-ID: References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of mai.hallikainen.org designates 74.208.193.200 as permitted sender) receiver=protection.outlook.com; client-ip=74.208.193.200; helo=mai.hallikainen.org; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mitprod.onmicrosoft.com; s=selector2-mitprod-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=xcxsED7lr7LiriAAXfdDE9gE5lPcbRtaE55hvDS1nJI=; b=MFOmz3MkVuBGtdi3q14uNBxkyTma1Yu31FMouhWLm3ClvJxrZ7uTPlsMIxFMhuh2qpNMGEA7KOWY9US1lYi2yXJnXRDZ88JwwWpmlGMB6V7poGCdC0Risdwfr6DsVc6WaMIux/Q9CaRemCw73NXjXYv/j6T4fNF5nGBjU/hTJsM= authentication-results: spf=pass (sender IP is 74.208.193.200) smtp.mailfrom=mai.hallikainen.org; mit.edu; dkim=none (message not signed) header.d=none;mit.edu; dmarc=permerror action=none header.from=mai.hallikainen.org; user-agent: SquirrelMail/1.4.22-5.el6 errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-authentication-warning: mai.hallikainen.org: apache set sender to harold@mai.hallikainen.org using -f x-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 > Modeling it is probably not worth it as it will be difficult to make the > model accurate. The type of software you'd be looking for is called a > numerical electromagnetics code or NEC (pronounced like neck). I used to > use a shareware program called EzNEC which would operate free up to a > certain model complexity (probably not adequate to model a cylinder) and > was unlimited if you paid to register it. That was in 2002 - I don't know > what the best version/variant is now. > A demo version of EZNEC is available at https://www.eznec.com/ . Also, next year, the PRO version will become free (developer is retiring). Harold --=20 FCC Rules Updated Daily at http://www.hallikainen.com Not sent from an iPhone. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .