Antenna Product Portfolio for
Cisco Aironet 802.11n Access Points
At-A-Glance
Cisco
®
Aironet
®
802.11n access points (namely, the 1250 Series, 1260 Series, and
3500e Series) require the use of external antennas to make them fully functioning units.
Although most existing Cisco antennas can be used, Cisco has developed antennas
specifically designed for use with 802.11n access points to optimize performance. This
document explains the antenna options for the Cisco Aironet 802.11n access points.
Flexible Options
Cisco offers a variety of antennas that provide different mounting options and coverage
patterns. Customers can select an antenna that will increase the overall efficiency
and data rates of their wireless network, while accommodating specific deployment
conditions, including physical layout, distance, and aesthetics. To optimize the overall
performance of a Cisco wireless LAN, it is important to understand how to maximize
radio coverage with the appropriate antenna selection and placement. Table 1 illustrates
three antenna types available for use with the 802.11n access points..
Table 1. Antenna Types for Cisco Aironet 802.11n Access Points
Antenna Type Description Ideal Deployment
Omnidirectional
360 degree coverage pattern. Circular
pattern to cover wide areas
Open office areas, hallways, conference
rooms, outside areas
Dipole
360 degree coverage pattern. Circular
pattern covers large areas
Carpeted space environments, classrooms,
hallways, conference rooms.
Directional
Focused signal to direct energy in
certain directions
Hallways, outside areas, on walls pointing
inward to direct signals.
Omnidirectional Antennas
An omnidirectional antenna is designed to provide a 360-degree radiation pattern. This
type of antenna is used when coverage in all directions from the antenna is required.
Cisco provides different types of omnidirectional antennas for use in a variety of
environments, such as retail, manufacturing, or offices. Cisco provides both dipole
antennas and indoor/outdoor omnidirectional antennas.
Dipole Antennas
Dipole antennas provide a large, circular coverage pattern. The antennas are available
in three different colors (white, black and gray) so that they blend better into the area in
which they will be placed. The white and black dipole antennas can be bent in different
angles to modify the coverage as needed. The gray dipole does not offer this option
and is shorter than its counterparts. If a reduced-sized dipole antenna is needed (for
example, in an area where dipoles projecting into the space are undesirable), the gray
dipole should be considered.
Other applications for dipoles include large, open areas like conference rooms or
lecture halls. Areas requiring shared coverage—in which the access point is placed in
the middle of the room or in a hallway, such as in a hotel or medical facility—are also a
good use for the small form-factor dipole. Because of the circular pattern of coverage
provided by dipole antennas, rooms located directly off the hallway may receive
coverage as well. Table 2 lists the part numbers for 2.4-GHz and 5-GHz dipole antennas.
Table 2. Dipole Antennas for Cisco Aironet 802.11n Access Points
2.4-GHz Dipole Antenna Part Numbers Quantity Required Color Gain
AIR-ANT4941,
AIR-ANT2422DB-R*
3 Black 2.2 dBi
AIR-ANT2422DW-R=,
AIR-ANT2422DW-R*
3 White 2.2 dBi
AIR-ANT2422DG-R=,
AIR-ANT2422DG-R*
3 Gray 2.2 dBi
AIR-ANT2422SDW-R=,
AIR-ANT2422SDW-R*
3 White (Short) 2.2 dBi
5-GHz Dipole Antenna Part Numbers Quantity Required Color Gain
AIR-ANT5135D-R,
AIR-ANT5135DB-R*
3 Black 3.5 dBi
AIR-ANT5135DW-R=,
AIR-ANT5135DW-R*
3 White 3.5 dBi
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(9 pages)
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