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V Beam, do they work?
Dale Parfitt wrote: wrote in message oups.com... I've been modeling V beams off and on for a few years now, and never can seem to get one that has useful gain. Has anyone seen a successful model anyplace of a two or three wave V with good gain?? 73 Tom Hi Tom, I have a model of a 5 wavelength 24MHz Vee beam in AO- I can send the file if it is useful to you. AO reports 11dBi free space gain. Included angle appears to be 44 degrees. I don't have AO Dave, so a description will work. That sounds like the problem I am seeing. With a 3-5 WL long V, I have about the same gain as a three element Yagi. But I'll still try to model your antenna with 5wl legs and 44 degree angle. Thanks. |
#2
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V Beam, do they work?
wrote in message oups.com... Dale Parfitt wrote: wrote in message oups.com... I've been modeling V beams off and on for a few years now, and never can seem to get one that has useful gain. Has anyone seen a successful model anyplace of a two or three wave V with good gain?? 73 Tom Hi Tom, I have a model of a 5 wavelength 24MHz Vee beam in AO- I can send the file if it is useful to you. AO reports 11dBi free space gain. Included angle appears to be 44 degrees. I don't have AO Dave, so a description will work. That sounds like the problem I am seeing. With a 3-5 WL long V, I have about the same gain as a three element Yagi. But I'll still try to model your antenna with 5wl legs and 44 degree angle. Thanks. Hi Tom et al, This is from the AO library: F=24.94 The vertex is at the origin: 0,0 X,Y of 1st leg is 185.44', -74.92' #12 wire X,Y of 2nd leg is 185.44', 74.92' #12 wire Fed at the origin and modeled in free space AO reports Z= 255- J706 Forward gain= 11.34dBi F/B 2.70dB Hope this is useful, Dale W4OP |
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