I am far away from the modem router and have a very weak signal. There is no other wifi signal, so could you please tell me which Channel Width (20mhz or 40mhz) and channel (2.412ghz or 2.484ghz) is better?

I know these settings are not so important and there is some physical way to increase it, but I just want increase a much as possible!

  • buy a wifi range extender as in – gwillie May 29 '15 at 5:47

Waves attenuate more quickly at higher frequencies, so 2.412ghz is better. That said, you, being human, won't see any difference between the two. It would take a sensitive piece of equipment to measure any effective difference between the two even in a clean environment.

On channel width. More width = greater throughput. It has no impact whatsoever on range.

You'll need a WiFi extender.


I agree with Alex Atkinson that you probably need an extender - or either move your accesspoint or get a second one ( see How can I get the same SSID for multiple access points? )

To answer your question you will probably see increased range on 20 MHz compared to 40 Mhz - specifically a 3 dB stronger signal. This is because going from 20 to 40 Mhz means spreading your output-power into a larger frequency band - You maintain the same output-power but you basically maintain two seperate wifi-channels. This means dividing your power between two frequency bands, half for each, which is consistent with a 3 dB decrease.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.