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Errr, let me be a bit more specific...
The "beam width" of a quarter-wave has a very wide "acceptance ratio" and grabs much more reflection from the ionosphere--a half-wave has a much narrower beam width--it is a "quieter" antenna, but, grabs more of the signal I am after... At least, it appears like that... A five-eights-wave has even a lower beam width--these three antennas, because of length differences, exhibit differing reactances, when these reactances are cancelled (such as using an L-Match) they become "matched"--right? Of course, this ignores conductor resistance, and takes for granted the antenna is being fed at the proper point... Regards, John "John Smith" wrote in message ... Maybe I have a misunderstanding. I see a "mismatch" as being caused by only two factors, either an uncompensated reactance--or, as Cecil mentioned, feeding a bal/unbal antenna with the wrong feedline. Indeed, any feedline can simply be analyzed as a series of lumped reactances--inductive and capactitive. How should I be viewing this? Regards, John wrote in message oups.com... How does a mismatch affect the radiation pattern? tnx ..... It doesn't. I don't consider unbalanced, the same as mismatched, to answer Cecils question. Feedline radiation can effect the pattern due to a lack of balun, etc, but thats not the same thing as an impedance mismatch. Also...Antenna "loading" is not the same as antenna "matching". Many short verticals need both... MK |
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