Enterasys Networks 9033348-02 manual Antenna Polarization

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Mounting the Antenna

Antenna Polarization

With RoamAbout outdoor antenna products, it does not matter what type of polarization you choose, as long as the antenna at one end of the communications link is mounted in the same plane as the antenna at the other end.

Radio waves emitting from a Yagi directional antenna are linear, leaving the antenna in the same plane as the antenna elements.

When the elements are positioned up and down, the radio waves are vertically polarized.

When the antenna elements are positioned left and right, the radio waves are horizontally polarized.

Vertical polarization is standard for the RoamAbout 14 dBi directional antenna.

To minimize the influence of cross-talk between antennas, you might need to mount the antenna for horizontal polarization when:

Multiple antennas are mounted on the same antenna mast.

The wireless link transmissions cross another radio beam from a neighboring installation.

Antenna Installation 3-7

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Contents Outdoor Antenna Site Preparation and Installation Guide Page Page Regulatory Information Electrical Hazard Warnings Page Contents Antenna Installation Intended Audience PrefaceComponent Information Location Associated DocumentsAddress TechWriting@enterasys.com Getting HelpIcon Meaning Document ConventionsChapter Site Preparation Choosing a Wireless Network ConfigurationMaximum Distances Between Antennas Determining the Antenna LocationsDistances and Line of Sight Clearance FCC Line of Sight RoamAbout PC Card VariationsFresnel Zone and Line of Sight Clearance Potential Obstacles to Line of Sight not to scale Large Reflecting Surfaces Other Factors That Can Reduce Antenna RangeOther Requirements Installer is responsible for local building codesRoamAbout 5 dBi Vehicle-Mount Antenna Antenna OptionsKIT RoamAbout 14 dBi Directional AntennaExample Outdoor Yagi Antenna Configuration Antenna KIT RoamAbout 7 dBi Omni-Directional AntennaExample Omni-Directional Antenna Configuration Lightning Protection Contacting an Antenna Installation CompanyMounting Requirements Line of SightInstallation Requirements Page Determining the Location of the Access Point Chapter Access Point Placement ConfigurationAccess Point 2000 Installation Overview Overview of Connecting Cables to the Access PointOverview of Connecting Cables to the Access Point Settings from the RoamAbout Access Point Installation Menu Overview of the Access Point ConfigurationRoamAbout Access Point Manager Overview of the Access Point Configuration Chapter Antenna Installation Verify Component Connector Polarity Installation OverviewSelecting the Correct N-Type Connector Grounding System Lightning Protector InstallationLightning Protector Installation Mounting the Antenna Antenna Polarization Antenna Cables section on Mounting the Directional AntennaMounting the 14 dBi Antenna to a Mast Mounting the Omni-Directional Antenna Mounting the Omni-Directional Antenna to a Mast Mounting the Vehicle-Mount Antenna Mounting the Vehicle-Mount AntennaAntenna Cable Route Connecting the Antenna CablesConnecting the Cables Optimizing RoamAbout Outdoor Antenna Placement Routine Maintenance RoamAbout 14 dBi Directional Antenna Table A-1 14 dBi Directional Antenna SpecificationsRoamAbout 14 dBi Directional Antenna RoamAbout 7 dBi Omni-Directional Antenna Table A-2 7 dBi Omni-Directional Antenna SpecificationsVehicle-Mount Antenna Table A-3 Vehicle-Mount Antenna SpecificationsRoamAbout Pigtail Connection Table A-4 Pigtail Connection SpecificationsLow-Loss Antenna Cable Mechanical SpecificationsConnectors RoamAbout Lightning Protector Table A-8 Lightning Protector Specifications