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Yagi efficiency
When one looks at a.radiating array pattern one can see that the yagi
is very inefficient. Does anybody know of the relative volume contained in the main radiation lobe versus the total volume of the entire pattern? I know there are a lot of different type antenna gains and arrangement but I am trying to determine in an informal way the efficiency ratio and compare it to what would appear to be a very efficient antenna such as a dish. A casual look at a yagi radiation pattern would suggest that it is less than 50% efficient at best especially when considering DX work where even the main lobe is less than 50% efficient when looking at available signal paths beyond 4000 miles which are somewhat below 12 degrees and where the main lobe itself is centered between 13 and 14 degrees with an average amateur antennah Art |
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