Cisco Aironet Very Short 2.4-GHz Omnidirectional Antenna (AIR-ANT2422SDW

Cisco Aironet Very Short 2.4-GHz Omnidirectional Antenna (AIR-ANT2422SDW
Cisco Aironet Very Short 2.4-GHz
Omnidirectional Antenna (AIR-ANT2422SDW-R)
This document outlines the specifications for the Cisco Aironet Very Short 2.4-GHz Omnidirectional
Antenna (AIR-ANT2422SDW-R) and provides instructions for mounting it. The antenna operates in the
2.4-GHz frequency range and is designed for indoor use.
The following information is provided in this document.
•
Technical Specifications, page 2
•
System Requirements, page 3
•
Safety Precautions, page 4
•
Installation Notes, page 4
•
Installing the Antenna, page 4
•
Obtaining Documentation, Obtaining Support, and Security Guidelines, page 5
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© 2009 Cisco Systems, Inc. All rights reserved.
Technical Specifications
Antenna type
Omnidirectional
Operating frequency
range
2400–2500 MHz
VSWR
2:1 or less
Peak gain
2.5 dBi
Polarization
Linear
Azimuth plane 3 dB
beamwidth
Omnidirectional
Elevation plane 3 dB
beamwidth
50°
Length
1.7 in. (4.3 cm)
Diameter
0.75 in. (1.9 cm)
Connector
RP-TNC
Environment
Indoor only
Operating temperature
32° F to 131° F
(0° C to 55° C)
Note
252855
Technical Specifications
The following antenna radiation patterns were obtained with the antenna connected to a Cisco
Aironet 3500 Series Access Point.
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System Requirements
Azimuth and Elevation Patterns End Antenna
Azimuth and Elevation Patterns Middle Antenna
Azimuth and Elevation Patterns End Antenna
System Requirements
This antenna is designed for indoor use with any 2.4-GHz Cisco Aironet radio device that uses a RP-TNC
connector.
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Safety Precautions
Safety Precautions
There are no specific safety precautions associated with this antenna. Translated versions of the
following safety warnings are provided in the Safety Warnings for Cisco Aironet Antennas, which is
available at http://cisco.com.
Installation Notes
Antennas transmit and receive radio signals which are susceptible to RF obstructions and common
sources of interference that can reduce throughput and range of the device to which they are connected.
Follow these guidelines to ensure the best possible performance:
•
Keep the access point away from metal obstructions such as heating and air-conditioning ducts,
large ceiling trusses, building superstructures, and major power cabling runs.
•
The density of the materials used in a building’s construction determines the number of walls the
signal can pass through and still maintain adequate signal strength. Consider the following before
choosing the location for your antenna:
– Signals penetrate paper and vinyl walls with little change to signal strength.
– Signals penetrate only one or two solid and pre-cast concrete walls without degrading signal
strength.
– Signals penetrate three or four concrete and wood block walls without degrading signal
strength.
– Signals penetrate five or six walls constructed of drywall or wood without degrading signal
strength.
– Signals will likely reflect off a thick metal wall and may not penetrate it at all.
– Signals will likely reflect off a chain link fence or wire mesh spaced between 1 and 1 1/2 in.
(2.5 and 3.8 cm). The fence acts as a harmonic reflector that blocks the signal.
•
Install the access point away from microwave ovens and 2-GHz cordless phones. These products
can cause signal interference because they operate in the same frequency range as the device to
which your antenna is connected.
Installing the Antenna
Align the antenna TNC connector with the TNC connector on the access point. Tighten the antenna
hand-tight. Do not over tighten.
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Obtaining Documentation, Obtaining Support, and Security Guidelines
Obtaining Documentation, Obtaining Support, and Security
Guidelines
For information on obtaining documentation, obtaining support, providing documentation feedback,
security guidelines, and also recommended aliases and general Cisco documents, see the monthly
What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical
documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
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Obtaining Documentation, Obtaining Support, and Security Guidelines
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Obtaining Documentation, Obtaining Support, and Security Guidelines
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Obtaining Documentation, Obtaining Support, and Security Guidelines
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