What is the typical RF range?

What is the typical RF range?

• A. 3 Hz - 300 MHz
• B. 30 Hz - 300 GHz
• C. 30 kHz - 300 MHz
• D. 300 Hz - 3 GHz

Answer: (B)

RF range refers to the portion of the electromagnetic spectrum used for wireless communication, which covers a very broad span from very low frequencies up into very high frequencies. In practice, radio frequencies extend from tens of hertz up to hundreds of gigahertz, so describing a range that goes from about 30 Hz to 300 GHz captures the wide spectrum used for different wireless technologies. This makes the choice that lists a broad span from 30 Hz to 300 GHz the best fit, since it includes both the lower and upper ends of typical RF usage. The other options miss significant portions of the spectrum: they either cap the high end too early, miss parts of the low end, or fail to cover both extremes, so they don’t represent the common breadth of RF.

RF range refers to the portion of the electromagnetic spectrum used for wireless communication, which covers a very broad span from very low frequencies up into very high frequencies. In practice, radio frequencies extend from tens of hertz up to hundreds of gigahertz, so describing a range that goes from about 30 Hz to 300 GHz captures the wide spectrum used for different wireless technologies. This makes the choice that lists a broad span from 30 Hz to 300 GHz the best fit, since it includes both the lower and upper ends of typical RF usage. The other options miss significant portions of the spectrum: they either cap the high end too early, miss parts of the low end, or fail to cover both extremes, so they don’t represent the common breadth of RF.