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| subject: | Antenna |
MR> JB> Correct me if I'm wrong, but doesn't a balanced design have a MR> JB> 'virtual ground' roughly between the points that the wires diverge? MR>Virtual means imaginary. It is just a mathematical curiosity. MR>Grounding that point won't make a difference at all. Consider a MR>balanced antenna in deep space, there is no ground to be found MR>anywhere but it still works as well as on Earth. Now an unbalanced MR>antenna can also work but it must be supplied an artificial ground or MR>"counterpoise". This consists of at least 2 radials establishing a MR>ground plane opposite the antenna. In effect the combination of MR>unbalanced antenna and counterpoise behaves like a balanced antenna. MR>Mobile antennas like CB's & taxis are a familiar example. How about Handhelds?? Most nowdays don't even have a Metal Chassis to Represent a "Floating Ground" --- þ SLMR 2.1a þ This note from El Cajon California USA* Origin: Try Our Web Based QWK: DOCSPLACE.ORG (1:123/140) SEEN-BY: 633/267 270 @PATH: 123/140 500 106/2000 633/267 |
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