Why is the 802.11b network divided into 22MHz bands?

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The 802.11b and g networks are divided into 22MHz bands to balance the number of available channels and achievable data rates. Narrower bands could increase data rates but would limit the number of simultaneous channels, while wider bands risk interference among devices. The choice of 22MHz likely represents an optimal compromise for performance and channel availability. This division is crucial for maintaining efficient wireless communication. Understanding these trade-offs is essential for optimizing network performance.
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I have been trying to learn why 802.11b and g networks can only use 3 22MHz bands simultaneously why can't these bands be made smaller for faster data rate transfer. Why is it divided specifically in 22MHz bands?

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Your channel bandwidth determines your data rate. So you could make narrower bands if you were willing to sacrafice data rate. Or you could make wider bands if you were willing to increase the chance that neighboring devices would interfere with each other.

Not sure why a particular bandwidth was used, but it probably gave the best tradeoff between the number of channels that could be created versus the highest data rate.
 

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