Enterasys Networks 9033348-02 - Manual (Page 41)

Antenna Installation 3-7
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.