A band
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| NATO Radio bands |
| IEEE Radio bands |
The A band is the range of radio frequencies up to 0.25 GHz in the electromagnetic spectrum. This is equal to wave lengths greater than 1.2 m.
| Radio spectrum | ||||||||||
| ELF | SLF | ULF | VLF | LF | MF | HF | VHF | UHF | SHF | EHF |
| 3 Hz | 30 Hz | 300 Hz | 3 kHz | 30 kHz | 300 kHz | 3 MHz | 30 MHz | 300 MHz | 3 GHz | 30 GHz |
| 30 Hz | 300 Hz | 3 kHz | 30 kHz | 300 kHz | 3 MHz | 30 MHz | 300 MHz | 3 GHz | 30 GHz | 300 GHz |
| The Electromagnetic Spectrum (Sorted by wavelength, short to long) | |
| Gamma ray | X-ray | Ultraviolet | Visible spectrum | Infrared | Terahertz radiation | Microwave | Radio waves | |
| Visible (optical) spectrum: | Violet | Blue | Green | Yellow | Orange | Red |
|---|---|
| Microwave spectrum: | W band | V band | K band: Ka band, Ku band | X band | C band | S band | L band |
| Radio spectrum: | EHF | SHF | UHF | VHF | HF | MF | LF | VLF | ULF | SLF | ELF |
| Wavelength designations: | Microwave | Shortwave | Mediumwave | Longwave |
