- Cisco Network Router User's Manual

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CiscoAironetAccessPointDeploymentGuide 
CiscoSystems
Copyright©2012CiscoSystems,Inc.Allrightsreserved.
Page35of52
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ExternalAntennaDeployments
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All Cisco antenna connectors are labeled A, B, C, and so on. A has a higher priority than B, C, or D;
therefore,iftheaccesspointsupportssaythreeorfourantennasandyouonlyhavetwoantennas,use
portsAandBuntilyoucouldinstalltheadditional
antennas.
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It is possible to support 802.11a/b/g clients or single spatial stream N clients with only one or two
antennas. Cisco does not recommend this because there is a significant degradation of performance,
and ClientLink functionality is lost. If you choose to use fewer antennas, configure the access point in
softwaretonotusetheotherantennas.
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Note:Theentry‐levelAP 1600hasthreeantennaports thatarenotconfigurable.TheAP2600/3600has
fourconfigurableantennaports,withoneextratransceiver(receiver/transmitter)perband.
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MIMOs(dual ‐radiatingelementantennas)include:
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AIR‐ANT2524V4C‐R – Dual‐bandomnidirectional
– 2/4dBiceilingmountomniuse
AIR‐ANT2544V4M‐R – Dual‐bandomnidirectional – 4/4dBiwallmountomniuse
AIR‐ANT2566P4W‐R – Dualbanddirectional – 6dBipatchwallmountuse
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For MIM Os, it is not critical which antenna lead goes into which antenna port on
the access point, as
long as all the antenna ports on the AP are connected to the antennas. The patch antenna AIR‐
ANT2566P4W‐R has the elements spaced side by side in the plastic housing, so there is a slight
improvementifyouusetheoutertwoelementsonthepatch
onportsAandB(seeFigure46),butthisis
notcritical.OntheAP1600,portAisspacedfurthestfromBandCforbestdiversity,asshowninFigure
47.
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Figure46:6dBiPatchAntenna
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