62 lines
1.6 KiB
Plaintext
62 lines
1.6 KiB
Plaintext
= Frequency Range =
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The Frequency ranges of radio are broken into several bands that are named and
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standardized. They appear below
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| Name | Abbreviation | Range | Notes |
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| Very Low Freq | VLF | 3khz - 30khz | |
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| Low Freq | LF | 30khz - 300khz | |
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| Medium Freq | MF | 300khz - 3mhz | AM Radio |
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| High Freq | HF | 3mhz - 30mhz | Shortwave, 10m to 1m |
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| Very High Freq | VHF | 30mhz - 300mhz | VHF TV, FM radio, 1000cm to 100cm |
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| Ultra High Freq | UHF | 300mhz - 3ghz | UHF TV, 3G/4G, 100cm to 30cm |
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| Super High Freq | SHF | 3ghz - 30ghz | |
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| Extreme High Freq | EHF | 30ghz - 300ghz | |
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To calculate a wavelength from a frequency
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```
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WL = c / f
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```
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Where WL is wavelength,
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c is speed of light (3 * 10^8 m/s)
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f is frequency
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A shorthand is
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```
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WL = 300 / f
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```
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Where f is in Mhz
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== Frequency to Wavelength ==
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Below are the common wavelength and frequencies
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| Frequency (Mhz) | Wavelength |
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| HF/MF | HF/MF |
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| 1.8 | 160m |
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| 3.5 | 80m |
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| 5 | 60m |
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| 7 | 40m |
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| 10 | 30m |
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| 14 | 20m |
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| 18 | 17m |
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| 21 | 15m |
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| 24 | 12m |
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| 28 | 10m |
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| VHF | VHF |
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| 50 | 6m |
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| 144 | 2m |
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| 222 | 1.25m |
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| UHF | UHF |
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| 440 | 70cm |
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| 902 | 33cm |
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| 1240 | 23cm |
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| 2300 | 13cm |
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