What is included in the total resistance of an antenna system?

The total resistance of an antenna is composed of exactly two parts: radiation resistance and ohmic resistance. Radiation resistance is a theoretical resistance that represents the power actually converted into radio waves and radiated into space. Ohmic resistance, on the other hand, represents the real physical losses in the antenna materials, such as heat lost in the metal elements, loading coils, and physical connections. Together, these two values dictate the antenna's overall feedpoint impedance and efficiency. Distractors involving transmission line resistance are incorrect because the transmission line is considered a separate component from the antenna itself. Space impedance relates to the propagation of waves in a vacuum, not the internal resistance of the antenna structure.