Extra exam question E9E09
Subelement E9, ANTENNAS AND TRANSMISSION LINES· Group E9E
Which of the following is used to shunt feed a grounded tower at its base?
- A.Double-bazooka match
- B.Beta or hairpin match
- C.Gamma match (correct answer)
- D.All these choices are correct
WhyA gamma match is used to shunt feed a grounded tower at its base. A gamma match is commonly used to shunt-feed a grounded tower at its base, connecting the feed line's center conductor to a point partway up the tower while the tower itself remains grounded, the same basic gamma-match principle used on a Yagi element but applied to an entire tower structure, answer C. A double-bazooka match and beta/hairpin match are used in other antenna contexts, they aren't the standard technique for shunt-feeding a grounded tower base, so "all these choices" overstates it.
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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