feed methods? feed methods? avoy (Aerospace) (OP) 3 Mar 17 13:54 In Kraus book on antenna he mentioned two types of feeding http://res.cloudinary.com/engineering-com/image/upload/v1488549241/tips/feed_g1ujwf.psd But what will be the difference for these two methods? RE: feed methods? VE1BLL (Military) 3 Mar 17 17:49 Your .psd file is in a proprietary file format. Photoshop. Not everybody would be able to open this. It would be better to extract the same image and paste it in-line using the image paste buttons. RE: feed methods? MacGyverS2000 (Electrical) 6 Mar 17 12:10 I just used an online viewer... Dan - Owner http://www.Hi-TecDesigns.com RE: feed methods? VE1BLL (Military) 6 Mar 17 16:06 Was it interesting? RE: feed methods? IRstuff (Aerospace) 6 Mar 17 16:35 As a GIF TTFN (ta ta for now) I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm http://files.engineering.com/getfile.aspx?folder=ad3bf3d4-2828-4c38-828b-fd RE: feed methods? VE1BLL (Military) 7 Mar 17 00:51 RE: feed methods? VE1BLL (Military) 7 Mar 17 01:06 The first a) is just a loop fed with balanced transmission line. Nothing complicated. The second b) seems to be just a (thicker) loop fed at the top with coax snuck through one arm. The diagram for b) lacks detail. At first I thought it might be a shielded loop, but on closer inspection it's not. There's a good discussion of shielded loops here, for ref. But it's not that. RE: feed methods? khiggler (Electrical) 19 Mar 17 02:03 Feed b) will radiate from the outer jacket of the cable. Hence it will affect your antenna pattern. Feed a) needs a balun to make it work normally.