Radiation resistance is that part of an antenna's feedpoint electrical resistance caused by the emission of radio waves from the antenna.
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| Short dipole of length <math>\ \tfrac{1}{50} \lambda < \ell < \tfrac{1}{10} \lambda\ </math>
|style="text-align:center;"| <math>20\pi^2\left( \frac{\ \ell\ }{\lambda} \right)^2</math>
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| Base-fed quarter-wave monopole<br/> over a perfectly conducting ground plane
|style="text-align:center;"| 36.5
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