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Forums
Physics
Classical Physics
Electromagnetism
Why do we want high Radiation Resistance in an antenna?
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[QUOTE="sophiecentaur, post: 5443930, member: 199289"] It's because when you try to match the source to an antenna with a very low radiation resistance, you find that the resistance of any practical matching network (despite your trying to transform to a low value) gives you a source resistance of several Ohms feeding a Radiation Resistance of a small fraction of an Ohm (perhaps) and that means a lot of wasted energy. In the case of a very short monopole and especially a long or medium frequency monopole, the Ground Network ('mat') resistance will be appreciable in comparison. It's a bit like trying to heat up a block of copper by passing current through it from a normal power supply - it's like a short circuit and all the heat goes in the power supply and the wires. [/QUOTE]
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Forums
Physics
Classical Physics
Electromagnetism
Why do we want high Radiation Resistance in an antenna?
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