The real part of the impedance of dipole antenna is computed rigorously instead of solving a boundary value problem of a partial differential equation. In this paper the resistance of the dipole antennas, whose shape was determined from an ordinary differential equation of first order and the length 2h is in the limits of , were computed and measured. The frequency used was 1500MC and the image screen, 93$ imes$93$ extrm{cm}^2$ rectangular aluminium plate, was used for the measurements. The measured resistance was consistent with the theoretical result.