![]() There is no gain in the direction of the wire itself. In other words, it communicates with other antennas that share a mutual horizontal relationship. More importantly, the half-wave dipole is FORGIVING to neophytes because of its simple "doughnut" (omnidirectional) radiation pattern, at right angles and all around, to the wire(s). ![]() ![]() I do not know how high above the earth this configuration must be perhaps Johannes can answer that. i.e, so as to find that mirror (the earth) that it depends on. Proper orientation of the quarter-wave element.the original wire. Johannes added, with excellence, that the OP really started out with a quarter-wave dipole that uses a phantom second half (the earth, as a mirror) to make a more proper antenna. The OP inquired about using a "longer wire" and I want to introduce caution to that point. not relevant here, but worth cognizance, just the same. This has dramatic importance if one is trying to tune a length of feeder cable. Moreover, the velocity of EM radiation in a coaxial cable is much slower, and it is listed for each type of coaxial cable. the exact number of a simple wire escapes me at the moment. For a velocity factor, 95% is a fair guess. ![]() When calculating the length of antenna elements, remember to use the propagation velocity that is less than "c," the velocity of EM radiation in free space. ![]()
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