Derek, Here are the input power numbers to generate 200 V/m for the EMCO 3115, according to a test house test procedure (note max power into horn is listed as 300 Watts). Also note this is the older “green” horn, not the newer model with red sides.
GHz Watts 1 318.2 2 178.5 3 168 4 141.5 5 127 6 119 7 114 8 112 9 99.5 10 89.5 11 91.3 12 75 12.4 51.3 13 54.9 14 57.2 15 42.3 16 31.5 17 42 18 62 I have checked these out using E = sqrt (30*P*G)/r (free field calculation) and they check precisely. Obviously these calculations ignore line losses and ground plane proximity effects. Ken Javor Phone: (256) 650-5261 _____ From: Derek Walton <[email protected]> List-Post: [email protected] Date: Tue, 11 Dec 2007 08:21:39 -0600 To: IEEE EMC Discussion Group <[email protected]> Subject: 200 v/m power needed Morning all. I'm trying to do a sanity check here determining how much power I need to generate 200 v/m over a ground plane using the typical 1 to 18 DRWG horn antenna. ETS used to have a typical field strength Vs forward power chart on their site: it seems to have gone. Does anyone have typical curves they can share? Off line is fine. Thanks, in advance, Derek Walton L F Research. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
