The word spectrum in this context refers to a series of radio waves used for communication purposes. This includes the FM and AM radio broadcasts he listens to on his commute, as well as other forms of wireless communication such as his Bluetooth and Wi-Fi. The smartphone you use also uses the same radio waves to transmit data, but the difference really lies in the specific frequencies used and of course the technology used to convert those radio waves into something useful ( whether it is radio audio). , an SMS you read or a web page you read). The only characteristic of the spectrum that you need to understand is frequency. This is the number of times the wave repeats in one second. This can be easily understood from the image below. The top wave is low frequency and repeats slowly. The lowest (highest frequency) wave is repeated 10 times between 3 repetitions. High frequencies clearly traveled much farther in the same amount of time, but linearly they both traveled that distance. High frequencies therefore require more energy to travel the same distance. On the other hand, the space required for 3 data items in the first wave fits in 10 in the second wave, allowing more information to be packed into the high frequencies at the same time.
So spectrum refers to the waves that are all around us all the time and that penetrate everything, which means they must be regulated. Simply put, the spectrum is the various frequencies at which electromagnetic waves can be generated, from a few kilohertz to terahertz or higher. is a continuum of The reason it is a scarce resource that needs to be managed and auctioned is that a spectrum range with a certain minimum width, also called bandwidth, is required to transmit data at a certain rate.
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