A Simple Method of Calculating Radiation Resistance

Proceeding on the basis of the formulas for the radiation resistance of a flat-top antenna and on the assumption that the current distribution along an antenna worked at a wave length far from its fundamental is linear, there are calculated the approximate radiation resistances for various forms of antennas (flat top, upward inclined top, downward inclined top). The general application of the formulas and curves to other forms of antennas is given, together with a discussion of possible sources of error in such calculations.