Which is the frequency range of Extremely High Frequency (EHF)?

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Multiple Choice

Which is the frequency range of Extremely High Frequency (EHF)?

Explanation:
Extremely High Frequency is defined as the upper microwave band, spanning from 30 to 300 GHz. This places it above the 3–30 GHz range (the lower microwave band) and below the terahertz region that begins around 300 GHz. The given range of 30–300 GHz captures that high-end microwave slot, which is why it’s the correct choice. The other ranges fall outside EHF: 0.3–3 GHz is well below it, 3–30 GHz is still in the lower microwave band, and 300–3000 GHz lies in the terahertz range beyond EHF.

Extremely High Frequency is defined as the upper microwave band, spanning from 30 to 300 GHz. This places it above the 3–30 GHz range (the lower microwave band) and below the terahertz region that begins around 300 GHz. The given range of 30–300 GHz captures that high-end microwave slot, which is why it’s the correct choice. The other ranges fall outside EHF: 0.3–3 GHz is well below it, 3–30 GHz is still in the lower microwave band, and 300–3000 GHz lies in the terahertz range beyond EHF.

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