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Below
is a list of UHF Antenna equipment available in the category that
you have chosen. Add the items that you require by selecting the
add to cart option or peruse further detailed information by selecting
the more details option.
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UHF
Antennas Made Easy
The
antenna is the most important piece of equipment in an RF
communication system. It does not matter how powerful the
transmitter or how sensitive the receiver, without a good
antenna the propagation and collection of signals will suffer
and hence limit the communication range.
It
is also important to understand the relation of an antenna's
gain to it's radiating pattern. The diagram below shows
the radiating pattern of different gain antennas. As the
electrical design of the antenna is modified to increase
the gain, the omnidirectional pattern is squashed in a vertical
plane, therefore furthering the signal's coverage. A high
gain antenna will therefore give increased coverage on flat
terrain but the elevation will be limited making it unsuitable
in mountainous country.
In
the following information we will inform you on the basics
of UHF antennas and which antenna to choose to suit your
travelling requirements.
Hence
the antenna choice for undulating and mountainous terrain
is different than flat outback conditions.
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Radiation
Patterns of Different Db Gain Antennas
The
illustrations below best demonstrate how radiation patterns differ
between antennas.
As
you can see the lower dB gain antennas have a wide radiation pattern
which is ideal for the coastal traveller in undulating terrain.
The wider radiation pattern allows the RF to travel up and out
of the lower areas. You can now purchase extremely efficient 4-5
dB gain antennas like the AE4018K1, AE4012K2, AE4702, AE4703,
AE4705, CB5000 and many more.
The
higher dB gain antennas have a flatter and longer radiation pattern
which is ideal for flat or slightly undulating terrain. These
antennas are generally 6-7.5 dB gain. Some of the best antennas
in this category are AE4706, AE4011, Col6M, Col7M.
Extremely
efficient 4-5 dB Gain Antennas are the most popular sold antennas
in Australia for 4WD users. If you have any further queries regarding
antenna applications please feel free to leave us a message on
the olbis forum. Just click on the link in the left hand banner.
The
antennas listed below comprise of the most efficient in there
categories.
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