Radio Frequency Barriers - SonicWALL SonicPoint ACe Getting Started Manual

Radio frequency barriers
Determining how to circumvent RF barriers can be a
challenging part of the placement process, but RF barriers can
also be used beneficially in an attempt to block signals where
you do not want coverage. The 5 GHz frequency is more
sensitive to RF barriers. A wall that allows a 2.4 GHz wireless
network to operate can block a 5 GHz one.
Common RF barrier types
Barrier Type
Open air
Glass, wood, drywall, cube partitions
Floors and outer walls, aquariums
(brick/marble/granite/water)
Concrete, security glass, wire mesh,
stacked books/paper
Metal partitions, desks, reinforced
concrete
16 SonicWall SonicPoint ACe Getting Started Guide
RF interference
RF interference from home, office, and medical equipment is a
common challenge in wireless deployments.
When considering RF interference sources, remember that
most cell/wireless phones and Bluetooth devices only utilize
the 2.4 GHz frequency. As such, they should not cause
significant interference with wireless networks operating in
the 5 GHz frequency.
Common sources of RF interference
RF Signal Blocking
Very Low
Low
Medium
High
Very High
Interference
Possible Range
Source
2.4 GHz phones 100 feet
Bluetooth devices 30 feet
Microwave oven 10‐20 feet
Scientific and Short distance,
medical varies
equipment
Bands Affected
2.4 GHz
(802.11 b/g/n)
2.4 GHz
(802.11 b/g/n)
2.4 and 5 GHz,
depending on
shielding
2.4 and 5 GHz,
depending on
shielding