Radio spectrum refers to the whole ... A specific range of frequencies allocated for a specific purpose is called a "band". The existing "2G" bands for cell phones are shown below: As you can ...

In the U.S., the 902-928 MHz, 2.4 GHz and 5.7-5.8 GHz bands were initially used for machines that emitted radio frequencies, such as RF welders, industrial heaters and microwave ovens, but not for ...

Because mmWave bands are much higher-frequency than bands used for 4G and 3G, they do not reach as far, nor as well through solid objects. A typical mmWave base station ("tower") only covers one ...