Gent's Scientific-Atlanta has build dish antennas with this type of construction. The idea was the same, to lessen the transition on the edge of the dish. The idea never made it into production. The cost/benefit was not that great. My approach is to over build the ground plain. What I am using now is about 40x80 ft of galvanized steel hardware cloth soldered every 5 to 6 inches. This allows me to test to other standards as well. Al Patrick Scientific-Atlanta EMC Lab, Engineering Manager al.patr...@sciatl.com
______________________________ Reply Separator _________________________________ Subject: Re: ANSI C63.4-- OATS construction issues Author: "lfresea...@aol.com" [SMTP:lfresea...@aol.com] at IMS List-Post: emc-pstc@listserv.ieee.org Date: 11-12-98 10:03 PM Chaps, I recall an interesting paper where the ground plane edge did not end abruptly, but was shaped with what looked like petals. The work was also stretched to cover dish antennas etc. For some reason the idea came from Georgia springs to mind. The paper claimed better performance from a smaller plane, especially when elevated above ground level. Alas, I can't recall where I read this...... Can someone else? Best regards, Derek. --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).