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#1
November 4th 14, 10:52 PM
posted to rec.radio.amateur.antenna
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Short antennae - a reprise
wrote in message
... Why do you have this compulsion to post utter nonsense, gas bag? There are two major ways in which the power is dissipated. One is radiation, and the other is the i2r losses in the metal. They are not the "two major ways", they are the only two ways. It is easier for us to model things as though they were resistances, even if they were not. No, it is not; it makes no difference. (By the same token is the BJT modelled as a combination of resistances, capacitances and current generators) Gas bag babble. So, the power that is dissipated as radiation is modelled as though it is a resisitance, although it is not a resistance, but a mechanism by which power is dissipated. Nope, the radiation resistance is the result of the model. Once again you have the cart and horse reversed. In terms of the resistance model, that so-called radiation resistance behaves as though it There is no "resistance model", gas bag. is a resistance in series with the resistance of the wire, and it matters not what current you manage to force into the antenna, as the antenna shortens, and the apparent radiation resistance decreases, the i2r losses start to dominate, and therefore the short antenna is a poor radiator in not radiating all the power fed to it. Yet more gas bag babble and poor logic based on a false premise. -- Jim Pennino |
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