A rainbow in the sky, watching TV, remote control for your garage door or using a cell phone, what they all have in common, is that they all involve the electromagnetic spectrum.
Electromagnetic waves are a form of energy that has both an electric and magnetic field and wireless technologies use a frequency range of the electromagnetic spectrum.Here is a snapshot of what goes on inside the part of the electromagnetic spectrum we use.
Note: 5G uses a much higher frequency range. The chart above has been adjusted visually, compressing the higher frequencies into a shorter spacing.
Another way to visualise the higher frequencies is in a linear chart (as below) where the GHz units are evenly spaced.What has become common is the frequency range between 2.4 GHz to 6 GHz and what has been outlined are the frequencies addressed by Bloqed fabrics with a frequency range from 0.9 GHz to 10 GHz.
Source: NASA, EPA, Howstuffworks.com