# Understanding Wireless Bandwidth

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#### quantass

I've been reading wireless and bandwidth and am still confused on how having more bandwidth (ie. 200khz vs 200mhz) provides me with more data capacity. Can you please explain this for me?

#### perseous

(I've been reading wireless and bandwidth and am still confused on how having more bandwidth (ie. 200khz vs 200mhz) provides me with more data capacity. Can you please explain this for me?)

I am not to sure what you mean by data capacity. Do you mean the capacity of storage? (I don't think this is what you mean) Or do you think that capacity means data transfer rates. (More likely) What ever the case please clarify this matter and I will gladly help you out in this matter. I have set up several wireless networks and have a bit of research in the matter and I think I can answer this question for you.

#### JohnWill

##### Retired Moderator
Bandwidth and data capacity aren't directly related. More "bandwidth" provides a bigger hose for the data coming/going to the machine, but does nothing for data capacity on either end.

#### Ddruid

quantass said:
I've been reading wireless and bandwidth and am still confused on how having more bandwidth (ie. 200khz vs 200mhz) provides me with more data capacity. Can you please explain this for me?
Are you asking why you can get a higher data rate for a given frequency? Ie. Difference between using 900mhz, 2.4ghz, 5.8ghz, 60ghz?

The generic answer is it is due to wavelength and timing (a waves 'period'). Given the same time period a higher frequency will complete more cycles.

A 2.4ghz system will complete 2,400,000,000+- cycles per second and has a wavelength of 4.8".

A 5.8ghz system will complete 5,800,000,000+- cycles per second and has a wavelength of 2".

As far as how much data can be sent by each frequency, that is more dependant on the type of modulation being used.

I do know that they are pushing 1+Gb/s using 60ghz equipment and that there are already 60ghz equipment available to the market that does 600Mb/s.

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