How many non-overlapping, non DFS supporting channels are available in the 5GHz band, each 20MHZ wide?

In the 5GHz band, when considering channels that are each 20 MHz wide and are non-overlapping, one must look at the channel allocation as dictated by various regulations and standards. In general, the 5GHz band can accommodate several channels, but only certain ones can be used simultaneously without interference.

The first step is to recognize that the 5GHz spectrum includes several bands that can be allocated for Wi-Fi use, including UNII bands (Unlicensed National Information Infrastructure). In total, there are typically 24 non-overlapping channels available for use in a standard Wi-Fi deployment when operating in the 20 MHz width configuration.

These channels are spaced such that they do not overlap, allowing for multiple wireless devices to operate simultaneously without interfering with one another. This is particularly important in dense environments, minimizing co-channel interference.

The reasoning behind the selection of 24 channels arises from the way channel widths and frequency allocations are structured in the 5GHz spectrum as defined by regulatory bodies, allowing efficient use of this spectrum while adhering to technical specifications. Each of these channels can support various forms of wireless communication, making the 5GHz band valuable for high-throughput applications.

In contrast, options with fewer channels do not fully exploit the available spectrum,