Return-Path: Received: (qmail 9461 invoked from network); 25 Jun 1999 12:36:37 +0100 Received: from magnet.plus.net.uk (HELO magnet.force9.net) (195.166.128.26) by guiness.force9.net with SMTP; 25 Jun 1999 12:36:37 +0100 Received: (qmail 10506 invoked from network); 25 Jun 1999 11:36:52 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnet.plus.net.uk with SMTP; 25 Jun 1999 11:36:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 10xU9K-0003l4-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 25 Jun 1999 12:28:02 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mailserv.cc.kuleuven.ac.be ([134.58.8.44]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 10xU9I-0003kz-00 for rsgb_lf_group@blacksheep.org; Fri, 25 Jun 1999 12:28:00 +0100 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mailserv.cc.kuleuven.ac.be (8.9.0/8.9.0) with SMTP id NAA12576 for ; Fri, 25 Jun 1999 13:33:25 +0200 Message-ID: <3.0.1.16.19990625134314.2d8f9206@mail.cc.kuleuven.ac.be> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Fri, 25 Jun 1999 13:43:14 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: ERP Calculations In-reply-to: References: <3.0.1.16.19990624180651.2f0fc7fc@mail.cc.kuleuven.ac.be> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org Sender: I forgot one thing to mention in my previous mail : a short vertical monopole above a perfect ground has a gain of 4.77dBi or 2.62dBd (due to the radiation pattern), so you have to add (multiply) this 4.77dBi (or power-factor 3) to get your EIRP or alternatively add (multiply) 2.62dB (power-factor 1.83) to get your ERP. For EIRP is P = 3 x Ra x I^2 For a wavelength of 2200m and a vertical monopole of length L without topload : Peirp = 0.245 x L^2 x I^2 (P in mW, L in m, I in A) For a wavelength of 2200m and a vertical monopole of length L with infinite topload : Peirp = 0.979 x L^2 x I^2 (P in mW, L in m, I in A) For ERP is P = 1.83 x Ra x I^2 For a wavelength of 2200m and a vertical monopole of length L without topload : Perp = 0.149 x L^2 x I^2 (P in mW, L in m, I in A) For a wavelength of 2200m and a vertical monopole of length L with infinite topload : Perp = 0.597 x L^2 x I^2 (P in mW, L in m, I in A) 73, Rik Rik Strobbe ON7YD rik.strobbe@fys.kuleuven.ac.be Villadreef 14 B-3128 Baal BELGIUM (JO20IX)