It is fairly absurd to need to get a massive metal areas how big the earth just to obtain a good soil (although it works well!). The brand new closest practical approximation–a preliminary, heavy wire attached to the Environment–work pretty well so long as the fresh new wire is significantly reduced than just an excellent wavelength. Notice that I said wavelength. For folks who expect the „a RF floor” to stop the second harmonic off an excellent 10-meter rule (56 MHz), need a wire much reduced than 8 foot a lot of time. (No, four legs isn’t much reduced, and you can would not performs. Much shorter means dos base otherwise faster in length-within 56 MHz, that’s.)
The united states Armed forces Code Corps has just reported with the consequence of increased grounding techniques for cellular occupation tactical radio stations
Next type of cause, you may be thinking impossible to get a good floor at UHF. In fact, you can purchase an excellent soil in the UHF by using a large metal plate, that can easily be called a ground airplane. A big, flat working surface along with merchandise a low impedance during the UHF. (Yes, a good „apartment Planet” would work just as well since a circular that-at least when it comes to grounding-if perhaps you were far enough from its border.)
But when you are now living in a moment-floor flat (whenever i perform), how can you get a good HF floor? Basic, you need to see whether or perhaps not a footing needs. (An ac unit soil should be considered a requirement for those functioning gadgets out-of commercial fuel contours.) Of many antennas, not, eg dipoles and loops, operate just fine instead a keen RF soil. (więcej…)