Extra exam question E6E03
Subelement E6, CIRCUIT COMPONENTS· Group E6E
Which of the following materials supports the highest frequency of operation when used in MMICs?
- A.Silicon
- B.Silicon nitride
- C.Silicon dioxide
- D.Gallium nitride (correct answer)
WhyGallium nitride supports the highest frequency of operation among these materials when used in MMICs. Gallium nitride supports higher-frequency operation in MMICs than the other materials listed, thanks to its wide bandgap and strong high-frequency, high-power characteristics that have made it increasingly popular for RF power devices, answer D. Silicon, silicon nitride, and silicon dioxide (the latter two more commonly used as insulating or passivation layers rather than the active semiconductor) don't reach the same high-frequency performance GaN offers.
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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