General exam question G9C12
Subelement G9, ANTENNAS AND FEED LINES· Group G9C
Which of the following is a characteristic of using a gamma match with a Yagi antenna?
- A.It does not require the driven element to be insulated from the boom (correct answer)
- B.It does not require any inductors or capacitors
- C.It is useful for matching multiband antennas
- D.All these choices are correct
WhyA gamma match with a Yagi antenna does not require the driven element to be insulated from the boom. A gamma match connects to the driven element off-center through a matching rod without needing to cut the element or insulate it from a grounded metal boom, which is a major mechanical convenience over feeding directly at an insulated center point, answer A. It does require a series capacitor to cancel the match's added reactance, so it's not component-free, and it's a single-band matching technique tailored to one element's impedance, not a general multiband matching solution, so B, C, and D are wrong.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
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