Bands
RF signals travel at the speed of light, which is about 300,000 km/sec or 186,000 mi/sec. The distance between crest of the wave is called its wavelength. The segments of the radio spectrum are refered to by bands.
| Band Name | Frequency Range | Wavelength Range |
| LF Low Frequency | 30 kHz to 300 kHz | 10000 meters to 1000 meters |
| MF Medium Frequency | 300 kHz to 3 MHz | 1000 meters to 100 meters |
| HF High Frequency(shortwave) | 3 MHz to 30 MHz | 100 meters to 10 meters |
| VHF Very High Frequency | 30 MHz to 300 MHz | 10 meters to 1 meter |
| UHF Ultra High Frequency | 300 MHz to 3 GHz | 1 meter to 10 cm |
| SHF Super High Frequency | 3 GHz to 30 GHz | 10cm to 1cm |