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Galvanized or Copper Gound Rods?
"You" wrote in message ... In article , "Pete Bertini" wrote: define "rf ground". Something that provides a counterpoise for an unbalanced feedline situation that doesn't result in RF energy being wasted to heat earthworms, soil, etc. and radiates RF energy efficiently. the ground radiates? that's interesting. so the raised radials on my 80m 4-square would be considered an rf ground? I would consider them to be an effective RF ground at their 1/4 wave resonant points, just as would a tuned artificial RF ground used for stations at elevated locations. Pete Actually, a "GOOD" RF Ground will exhibit a very LOW Impedance across a broad Frequency Spectrum, and NOT just at any single Frequency.... When designing an RF Grounding System for a particular Site/Antenna System, it is almost as important to know the Frequencies, and Bandwidths, to be transmitted on, as it is to know the practical design of the Antenna itself. Earth Conductivity has a much smaller effect than most folks think. Oh dear. What does this say about "Artificial RF Grounds?" For that matter, is a tuned "artificial RF ground" a real "ground" or part of the antenna's radiation system? Pete |
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