Page 5 - Benelec Outreach
Basic HTML Version
March 2013
WN432ANT-5
Prices Ex. GST
Gain describes the shape of the radiation from an antenna.
Use a higher gain antenna for better performance in open flat
terrain. Use a lower gain antenna for better performance in
rough mountainous terrain.
3dB
6dB
9dB
For better performance locate the antenna higher on the
vehicle.
Brackets and antennamountings are tobe securedproperly.
Antennas must be mounted vertically, this is particularly
important with higher gain antennas.
Avoid affixing any object to the antenna as it could affect
the performance of the communications system.
Ground Plane antennas need to be fitted direct to
vehicle panels, as bracket mounting will compromise the
performance.
Do not mount antennas close to each other. Min distance
should be 70cm between antennas. The further apart
the two antennas, the better the performance of each
respective antenna.
Do not mount antennas closer than 70cm to any metal
vertical surface.
Do not mount antennas operating on the same band, at the
same horizontal level unless a switch selects them.
ANTENNA SELECTION GUIDE
WHICH ANTENNA DO I NEED?
Ground Plane Independent (GPI)
antennas can be mounted anywhere
on the vehicle.
These antennas work independently
of the vehicle body, and as such they
provide consistent performance all
the way around the antenna.
Grounded Plane (GP) antennas rely
on the metal surface of the vehicle for
performance. If you mount this style of
antenna on the edge of a vehicle, the
radiation pattern will be biased towards
the area with the largest amount of
metal (an offset pattern).
There will also be a deterioration in the
VSWR of grounded antennas that are
mounted on the edge of the vehicle.
Grounded antennas generally should
only be mounted in the centre of the
vehicle roof.
GP/GPI RADIATING PATTERNS
CONNECTOR ADVICE
CABLE ADVICE
We recommend to add a thread locking adhesive (eg
Loctite 242 Blue – Threadlocker Medium Strength) at the
interface between the cable connector (FME socket) and
the UHF plug adaptor as it’s possible for this connection to
vibrate loose over time.
Exposed connectors should be sealed with self
amalgamating tape such as Benelec P/N 5052219BK or
equivalent.
Care must be taken to not damage, cut or crush the coaxial
cable when routing it to the transceiver through a vehicle.
We recommend to seal any points where the cable enters
the vehicle.
3dB
6dB
When operating between mountainous and open terrain,
think about choosing an antenna with interchangeable high
gain and low gain whip tops, or use two antennas with an RF
switch.
Note that Stainless Steel whip antennas will not last on
corrugated roads. They are not suitable for this application.
We recommend the use of a lower gain antenna for the
communications in vehicle convoy situations.
MOUNTING TIPS & ADVICE
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