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Forums
Physics
Classical Physics
Electromagnetism
Why do we want high Radiation Resistance in an antenna?
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[QUOTE="phyzguy, post: 5443933, member: 237160"] The goal of the antenna is to radiate electromagnetic energy. Any electric circuit has resistance because conductors are not perfect. So the circuit basically has these unintended (we say "parasitic") resistances in series with the resistance of the antenna. If we then pass a current through this combined circuit, some power gets dissipated in the parasitic resistances, and some in the antenna. The ratio of the power dissipated in the antenna to the total power dissipated is the efficiency of the circuit. We make this efficiency higher by making the radiation resistance of the antenna greater than the parasitic resistance, ideally much greater. [/QUOTE]
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Forums
Physics
Classical Physics
Electromagnetism
Why do we want high Radiation Resistance in an antenna?
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