What is a disadvantage of decreasing the number of wire segments in an antenna model below 10 segments per half-wavelength?
Ground conductivity will not be accurately modeled
The resulting design will favor radiation of harmonic energy
The computed feed point impedance may be incorrect✓Correct answer
The antenna will become mechanically unstable
Explanation
Feed point impedance is computed from the current on the segments closest to the source, so too coarse a division misrepresents the current distribution exactly where accuracy matters most. With fewer than about 10 segments per half wavelength the pattern may still look plausible while the computed impedance is well off.