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In the case of a single monopole mounted with its base at earth level,
adding tilt to it makes very little difference in its gain at elevation angles up to +60 degrees or so, at any azimuth. It does partially fill the elevation null at the zenith produced by the vertical monopole, as well as to produce a small amount of h-pol radiation over most of the compass. Modeling this in NEC for a 1 MHz, 1/4-wave, straight monopole by moving its top 10 meters out of plumb changed its peak gain by about 0.01 dB compared to the untilted version, at any azimuth. RF |
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