の：of, in

１ＭＨｚ以上８００ＧＨｚ以下から選択される所定の帯域の電磁波

ChatGPT:

A precise and natural translation of
「１MHz以上８００GHz以下から選択される所定の帯域の電磁波」
is:

an electromagnetic wave in a predetermined frequency band selected from 1 MHz to 800 GHz

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✅ Component breakdown:

• １MHz以上８００GHz以下: from 1 MHz to 800 GHz

• 所定の帯域: a predetermined frequency band

• 選択される: selected from

• 電磁波: electromagnetic wave

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Alternative phrasing (equally correct, slightly more formal):

an electromagnetic wave in a predetermined band within the range of 1 MHz to 800 GHz

あなた:

With regard to の in 帯域の電磁波, should it be "an electromagnetic wave of a predetermined frequency band", or "an electromagnetic wave in a predetermined frequency band"?

ChatGPT:

Great question — and you're right to focus on the nuance of 「帯域の電磁波」.

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✅ Best choice:

“an electromagnetic wave in a predetermined frequency band”

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🔍 Why “in” is better than “of” here:

● "in a frequency band"

• This is the standard technical phrasing in physics and engineering.

• It expresses that the wave's frequency falls within a given range.

• Examples:

  • “signals in the 2.4 GHz band”

  • “emissions in the millimeter-wave band”

● "of a frequency band"

• Grammatically acceptable, but less idiomatic.

• May sound like the frequency band owns or produces the wave, which is not the intended meaning.

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✅ Therefore:

• For 帯域の電磁波, use:

  “an electromagnetic wave in a predetermined frequency band”

And to reflect the full original phrase:

“an electromagnetic wave in a predetermined frequency band selected from 1 MHz to 800 GHz”
is both precise and natural.