Return-Path: Received: (qmail 25462 invoked from network); 22 Mar 1999 08:52:30 -0000 Received: from magnus.plus.net.uk (HELO magnus.force9.net) (195.166.128.27) by medusa.plus.net.uk with SMTP; 22 Mar 1999 08:52:30 -0000 Received: (qmail 15153 invoked from network); 22 Mar 1999 08:55:21 -0000 Received: from post.thorcom.com (194.75.130.70) by magnus.plus.net.uk with SMTP; 22 Mar 1999 08:55:21 -0000 Received: from troy.blacksheep.org ([194.75.183.50] ident=root) by post.thorcom.com with esmtp (Exim 2.04 #3) id 10P0Ri-0001iv-00; Mon, 22 Mar 1999 08:52:30 +0000 Received: (from root@localhost) by troy.blacksheep.org (8.6.12/8.6.12) id IAA16397 for rsgb_lf_group-outgoing; Mon, 22 Mar 1999 08:48:06 GMT Received: from post.thorcom.com (root@post.unica.co.uk [194.75.183.70]) by troy.blacksheep.org (8.6.12/8.6.12) with ESMTP id IAA16333 for ; Mon, 22 Mar 1999 08:46:11 GMT Received: from mb04.swip.net ([193.12.122.208]) by post.thorcom.com with esmtp (Exim 2.04 #3) id 10P0Oy-0001E8-00 for rsgb_lf_group@blacksheep.org; Mon, 22 Mar 1999 08:49:41 +0000 Received: from s-257519 (dialup44-4-36.swipnet.se [130.244.44.228]) by mb04.swip.net (8.8.8/8.8.8) with SMTP id JAA04769 for ; Mon, 22 Mar 1999 09:45:50 +0100 (MET) Message-ID: <002e01be7440$4556d4c0$e42cf482@s-257519> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org Subject: LF: SV: Re: Re: LF - early April 1st question / QRU Date: Mon, 22 Mar 1999 09:44:58 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org Yes Roger, you are right and I agree. I guess the CFA was an attempt to produce a "ready made" flying far field already in the antenna structure. G3JKV was right too. Please let us stop this discussion before more internet bandwidth is wasted. Such a discussion will not lead anywhere because of the laws of nature. It was stupid of me to enter the thread. I apologize. 73 de Johan Bodin, SM6LKM -----Ursprungligt meddelande----- Från: Prof R. Jennison Till: INTERNET:rsgb_lf_group@blacksheep.org Datum: den 22 mars 1999 00:18 Ämne: LF: Re: Re: LF - early April 1st question It is not essential to produce Both the E and H fields. Either one can produce the other. For example the toroidal antenna launches only an E field with an associated vector potential that produce, in the far field, an H field to accompany the E field. Similarly a loop antenna launches only an H field with its associated vector potential and as a result the E field forms in the far field. In both cases one ends up with a complete propagating electromagnetic field. With respect, take a look at the curl of the vectors. Roger, G2AJV.