Extra exam question E9B03
Subelement E9, ANTENNAS AND TRANSMISSION LINES· Group E9B
What is the front-to-side ratio of the antenna radiation pattern shown in Figure E9-1?
- A.12 dB
- B.24 dB
- C.18 dB
- D.14 dB (correct answer)
WhyThe antenna radiation pattern shown in Figure E9-1 has a front-to-side ratio of about 14 dB. Front-to-side ratio compares the main lobe's peak level (0 dB) to the strongest side lobe, which in this pattern peaks around the -14 dB level, between the -12 and -24 dB rings, giving a front-to-side ratio of about 14 dB, answer D. The other figures don't match where the strongest side lobe actually peaks relative to the chart's labeled dB rings.
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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