Increase the Bandwidth of Your Wifi

Depending on the router, you may have noticed that the wifi is not as fast as you'd expect it to be and may be the choke point if you have a fast LTE connection.

The calculations show, and tests have proven, that a normal N wifi connection is only capable of, at its maximum, a speed of 48.9Mbs. This may be lower than the connection speed of your modem and is limiting your download speed.

And this is the maximum theoretical speed, real world speeds will be lower.

If your devices that connect to the wifi are capable of handling it, it is possible to double this speed by making changes to the router and the device. This change involves increasing the spectrum amount of the wifi channel. Not all devices will work with the larger channel size so the speed increase may not be possible. Some devices will work with the larger channel but will only operate at the lower speed.

This a representation of a normal wifi signal. It is 20Mhz wide and is centered on channel 11. You will notice that a wifi channel is not just one channel but covers, in this case, 4 channels. This is the default wifi setting for a ROOter and the signal is capable of speeds up to 48.9Mbs.

This is the same wifi channel but this time, instead of 20Mhz, the signal is set to 40Mhz Below. This means that the signal will take an extra 4 channels lower than the center channel. This signal is capable of speeds up to 97.8Mbs.

This is the wifi channel centered on channel 6 and is set to 40Mhz Above, meaning that the extra 4 channels are taken from above the center channel. It also can support speeds up to 97.8Mbs.

The choice of using 40Mhz Above or 40Mhz Below depends on the center channel you wish to use. Center channels above 7 should use 40Mhz Below, while center channels below 8 should use 40Mhz Above.

You will also notice that, because of the large number of channels used by the 40Mhz wide signal, you can not have more than one 40Mhz signal in an area without a great deal of interference that will slow down speeds.

To set your ROOters wifi to use a 40Mhz signal, go to the Network section and then to the Wifi subsection. Click on Edit and the Advanced Settings tab.

Use the dropdown box to select the signal width of your choice. Click on Save & Apply in the lower right corner to save the change.

This takes care of the router's wifi and it is now capable of double the speed of the default settings.

You must now determine if your devices can support this wider signal.

Some devices will not work at all with the wider signal so you are stuck with the slower wifi speed.

Some devices will automatically use the wider signal and run at the faster speed. Other can not use the wider signal but are compatible with it and will work with it but at the regular speed.

Some devices need to have their wifi settings changed to allow using the wider signal. We will look at an example of this.

Right click on your Network Icon in the Task Bar and select Open Network and Sharing Center. Select Change Adapter Settings in the upper left corner.

Right click on your Wifi Adapter and select Properties.

Click on the Configure button for the Network Adapter.

Select the Advanced tab. In this section you will see an entry you can enable to allow the adapter to use the 40Mhz wide signal or at least be compatible with it.

Once this is done you can use the wider signal to gain extra speed when transferring data over the router's wifi.