What is WiFi Extender And How Do they Work?

Wifi makes use of radio waves to do communication with the portable device.

In this way, it grants them access to other devices connected to the internet.

Well, several factors affect the range of these waves.

You might also be aware of the dead spots in your home or office where the wifi connection is not possible.

You can bridge these dead spots by using a WiFi extender.

In this way, you can quickly provide a sold signal throughout your facility.

Range And Interference:

Today the modern building have obstructions that attenuate the wireless signal even before it reaches to its maximum range.

  • The dense construction materials reduce signal strength in the walls.
  • Also, electronic devices use the frequency ranges that can cause interference with the wireless signal.
  • Cordless phones and microwaves also cause interference.

WiFi Extenders:

Such extenders come in different forms.

Wireless Bridge:

They can convert multiple physically wired computers and then grant them access to a wireless network that exists already.

To know more about wireless bridging read this article.


Repeaters make use of antenna to receive the signal and then rebroadcast them.

This does not require any physical connection to the network.

You can easily extend the signal by placing a repeater within your network range, and it will use its broadcast capacity to reach it.

Access Points:

They connect to your network by using ethernet cables physically and then broadcast the signal in the same way as the wireless router.

If you have a physical wired network and intend to have wireless coverage in some areas, then you can surely use access points to extend the system selectively.

It might be a bit cheaper than the using the repeater to get full coverage.

WiFi Boosters:

It is directly plugged into your wifi router via an ethernet port.

It broadcast the incoming connection as an additional wifi signal.

  • The signal strength of booster is generally stronger.
  • They are also much reliable than the routers.

For residential spaces boosters are might not be the best choice.

Wifi Signals:

Wifi signals travel in two frequency ranges,

These are:

  • 4 GHz
  • 5 GHz

2.4 GHz band issued by the 802.11b and g network while the 802.11a uses 5 GHz.

In the 802.11n network, the throughput is increase as it broadcast in both of these frequencies.

A wifi extender must cover the frequencies that you intend to use.

An incompatible wireless signal repeater does not provide any signal coverage fromthe devices that are outside its frequency range.


You must take extra care while installing the wifi extender in your office network.

Each of the extenders increases the useful range on your wireless network and thus this range may beyond the wall of your office facility.

If there are many interference sources in your office indoor, then the number of extenders that could give your employees an excellent wireless signal may also make you wifi network accessible to the users that are away from your office building.

Therefore you need to employ a proper wifi security protocol like WPA or WPA2 to protect your network from outside intrusions.