Getting poor or no Signal on a wireless router due to physical obstructions and interference

This article will guide you on what to do when getting poor or no signal on a wireless router due to physical obstructions and interference.

Low or poor wireless signal is mainly caused by the following major factors:

Physical Obstructions

Wireless networks are susceptible to obstructions that may lead to low signal connection.  Often, the signal gets reflected, refracted or absorbed by the obstruction. 

Common obstructions are:

  • Cabinets
  • Mirrors
  • Glasses
  • Metal objects
  • Thick walls and ceilings 

If you have any of these objects between your wireless adapter and access point/router, consider relocating your access point/router somewhere high or in an elevated area to get around the obstruction.

Wireless TechnologyWireless Range
SRX and/or SRX4003x than Wireless-G
SRX2002x than Wireless-G
Wireless-A (802.11a)25-75 feet
Wireless-N4x than Wireless-G



Neighboring wireless networks or any appliance that operates on the same frequency as your wireless device (e.g. 2.4 GHz) may cause interference affecting your wireless connection and signal.

Common sources of interference are:

  • Neighboring wireless networks
  • Microwave ovens
  • 2.4 GHz cordless telephones
  • Bluetooth devices
  • Wireless baby monitors 

To resolve this, change the wireless channel on your access point/router.  

NOTE:  In the U.S., the preferred wireless channels to use are 1, 6 and 11 since they’re considered non-overlapping channels.



QUICK TIP:  For wireless-n dual band-routers, it is best to use 20 MHz when in a 2.4 GHz or 5 Ghz populated area to avoid wireless interference.  For less crowded networks, you can use 40 MHz on a 5 GHz to your advantage.  If you're unsure, you may leave channel width at Auto.  This will automatically adjust the settings to 20 or 40 MHz, depending on which best fits your network. 

Was this support article useful?

Additional Support Questions?
Search Again