Extra exam question E9G05
Subelement E9, ANTENNAS AND TRANSMISSION LINES· Group E9G
Which of the following is a common use for a Smith chart?
- A.Determine the length and position of an impedance matching stub (correct answer)
- B.Determine the impedance of a transmission line, given the physical dimensions
- C.Determine the gain of an antenna given the physical and electrical parameters
- D.Determine the loss/100 feet of a transmission line, given the velocity factor and conductor materials
WhyA common use for a Smith chart is determining the length and position of an impedance matching stub. A common practical use for a Smith chart is determining the length and position of an impedance matching stub, since the chart makes it straightforward to visually track how adding a stub of a given length shifts impedance toward the desired match point, answer A. Determining transmission line impedance from physical dimensions, antenna gain from physical and electrical parameters, or line loss per 100 feet aren't things a Smith chart is used to calculate, those require other reference data or formulas.
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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