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On 2014-10-17 17:50:55 +0000, gareth said:
something unrelated to the OP Can I go back to your original question, and perhaps recast it in a way that is more useful for discussion? I think we have to accept that once you can get energy *into* a small antenna it radiates just as well as a large one, apart from resistive losses which can be made fairly small with suitable materials. A different but equally interesting question: is there any intuitive, or simple mathematical, way of explaining why an electrically short antenna couples into free space in such a way that its radiation resistance is very low compared with a resonant antenna, and highly reactive? Because this property is what makes short antennas hard to use in practice. And must result from some property of its radiation behaviour, conceivably related to your original postulate which I am afraid I do not have the maths to understand. -- Percy Picacity |
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Radiation from antennae - a new philosophy | Antenna |