Beijer Electronics korenix JetWave 3220v3 Series, Руководство пользователя

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JetWave 3220v3/3420v3 Series User Manual
Page 18
direction, but with different polarization. The result is only antennas with the same polarization
will be able to communicate with each other, this is important especially in point-to-pint wireless
communication.
There are two major polarizations, Vertical and Horizontal. The antenna may support either one,
you can choose Vertical or Horizontal polarization for the antenna installation. The result would
be that antenna which is vertically polarized would only receive the signal from the vertically
transmitting antenna, horizontally polarized antenna would only receive horizontally transmitting
antenna.
The below figures show the typical Horizontal / Vertical polarization:
Horizontal Polarization Vertical Polarization
Dual Polarization:
There is also “Dual Polarization” antenna which provides two ports to plug in, one for the vertical
and the other for the horizontal polarization. The dual polarization antenna can communicate
with antennas of both types of polarities at the same time from one antenna.
The below figure is the example of Dual Polarization connectors. There are 2 ports, one is for
Vertical polarization, the other is for Horizontal polarization. While installing the antenna, the 2
ports’ direction of the 2 end must be the same.
MIMO & Polarization:
To reach the 2T2R MIMO high performance, the antenna with dual polarization (also known as
DP) which supports both Vertical and Horizontal Polarization is necessary. While you select the
external antenna, check the Polarization specification of its datasheet or check with the supplier.
Normally, there are 2 connectors of the dual polarization antenna, this is also a way to identify