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Reg wrote:
The type of antenna or its radiation pattern has nothing whatever to do with the path taken by the radio wave through the ionosphere. The take-off angle and its name, generated by EZNEC, can be very misleading. It has to do. It allows us to direct the RF under desired angle to hit the layer or region that supports the propagation to the chosen target. I have seen situations when signals to Europe were coming under low angle and in the same direction, signals to deep Asia were coming under higher angle at the same time. There are different propagation modes and paths and be able to control radiation pattern of antenna is important (for serious hams, like contesters). I am not talking about skewed path, long path and other modes of propagation when horizontal and vertical control of the antenna radiation pattern is of huge benefit. So making blank statements like above is not proper. 73 Yuri K3BU |
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