Extra exam question E9B11
Subelement E9, ANTENNAS AND TRANSMISSION LINES· Group E9B
What is a disadvantage of decreasing the number of wire segments in an antenna model below 10 segments per half-wavelength?
- A.Ground conductivity will not be accurately modeled
- B.The resulting design will favor radiation of harmonic energy
- C.The computed feed point impedance may be incorrect (correct answer)
- D.The antenna will become mechanically unstable
WhyUsing fewer than 10 wire segments per half-wavelength in an antenna model can make the computed feed point impedance incorrect. Using too few wire segments, fewer than about 10 per half-wavelength, in an antenna model can make the computed feed point impedance inaccurate, since the model doesn't have enough resolution to accurately represent how current actually varies along the wire, answer C. It doesn't specifically affect ground conductivity modeling, doesn't favor harmonic radiation, and has nothing to do with the antenna's physical mechanical stability, those aren't consequences of an under-segmented simulation model.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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