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Cisco Aironet 4-dBi Omnidirectional Antenna 
(AIR-ANT5140V-R)

This document outlines the specifications, describes the AIR-ANT(AIR-ANT5140V-R) 4-dBi 
omnidirectional antenna, and provides instructions for mounting it. 

The antenna is designed specifically for use with pre-802.11n and 802.11n 3-antenna access points. The 
antenna operates in the 5-GHz frequency range and is designed for use only in an indoor office 
environment. The antenna assembly consists of three radiating elements, each fed with its own coaxial 
cable.

The following information is provided in this document.

Technical Specifications, page 2

System Requirements, page 4

Safety Instructions, page 4

Installation Notes, page 4

Obtaining Documentation, Obtaining Support, and Security Guidelines, page 12

Summary of Contents for Aironet AIR-ANT5140V-R

Page 1: ...The antenna is designed specifically for use with pre 802 11n and 802 11n 3 antenna access points The antenna operates in the 5 GHz frequency range and is designed for use only in an indoor office environment The antenna assembly consists of three radiating elements each fed with its own coaxial cable The following information is provided in this document Technical Specifications page 2 System Req...

Page 2: ...0 MHz Nominal input impedance 50 ohms 1 5 1 VSWR bandwidth 4900 5850 MHz Peak gain 4 dBi Polarization Linear E plane 3 dB beamwidth 45 degrees H plane 3 dB beamwidth Omnidirectional Front to back ratio 10 dB Length 6 9 in 17 5 cm Width 3 in 7 6 cm Height 1 in 2 5 cm Cable length and type 36 in 91 4 cm Plenum rated UV stable Operating temperature 32 F 131 F 0 C 55 C Antenna A Elevation and Azimuth ...

Page 3: ...3 Cisco Aironet 4 dBi Omnidirectional Antenna AIR ANT5140V R 78 17605 01 Technical Specifications Antenna C Elevation and Azimuth Pattern Antenna B Elevation and Azimuth Pattern ...

Page 4: ...ennas transmit and receive radio signals they 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 Mount the antenna to utilize its propagation characteristics A way to do this is to orient the antenna horizontally as high as possible at or...

Page 5: ...e so that the lead in cable can be as short as possible Installing the Antenna You can install the antenna on the following dropped ceiling systems Standard or recessed T rail 15 16 in 23 8 mm or 9 16 in 14 3 mm Channel type T rail 1 4 in 6 3 mm or 1 2 in 12 7 mm You can also install the antenna above a dropped ceiling ceiling using a user supplied bridge The antenna ships with the necessary hardw...

Page 6: ...nection instructions Tools and Equipment Required To install your antenna you need the following tools and equipment which are not supplied A pencil A small standard screwdriver A cutting tool suitable for cutting and trimming dropped ceiling tiles Masking tape Installing the Antenna on a Standard Dropped Ceiling T Rail The antenna is shipped ready to install on a standard dropped ceiling T rail N...

Page 7: ...ruction You should then be able to lower the ceiling tile onto the T rail Installing the Antenna on a Recessed Dropped Ceiling T Rail To install the antenna on a recessed dropped ceiling requires using the two recessed ceiling spacers included in the mounting kit These spacers attach to the recessed ceiling T rail and must be disassembled before you can attach them Figure 2 shows the antenna insta...

Page 8: ...p 7 Use a small standard screwdriver to tighten the two set screws on the spacers and secure the spacers to the T rail Do not overtighten the set screws Step 8 Connect the antenna cable to the access point or extender cables Step 9 Lower the ceiling tile onto the T rail Depending on the width of the T rail you may have to squeeze the tile to make it fit onto the T rail Installing the Antenna on a ...

Page 9: ...tall the antenna Step 2 Use a pencil to make an index mark at the locations on the T rail where you will install the channel T rail adapters Note These marks indicate the center points of the adapters and must be 10 3 16 in 24 8 cm apart Step 3 In the mounting kit locate two recessed channel ceiling adapters Step 4 Disassemble each adapter by pushing on its tabs using your thumb and forefinger 230...

Page 10: ...l T rail Do not overtighten the set screws Step 8 Connect the antenna cable to the access point or extender cables Step 9 Lower the ceiling tile onto the T rail Installing the Antenna Above a Suspended Ceiling To install the antenna above a dropped ceiling requires using the two bridge clips and 4 40 Phillips head machine screws that shipped in the mounting kit The clips attach the antenna to the ...

Page 11: ...fully move the antenna so that the clip tabs are fully inserted into the rectangular slots Step 8 Start a 4 40 Phillips head screw into each of the holes in the clip tabs Step 9 Use a Phillips head screwdriver to secure but not tighten the screws Step 10 Remove the masking tape from the clips Step 11 Verify that the antenna is attached to the bridge where you want it to be If it is not in the corr...

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