Installation
2.1.5 Dipole antennas
Unity gain dipole antennas are commonly used on unlicensed channels. The dipole
antenna does not provide any gain, so the power transmitted from the antenna is the
same as the power out of the module.
The WL-CFD890EL dipole antenna comes supplied with integral 5m cable. This cable
should not be extended for maximum range.
You should mount dipole antennas vertically, preferably at least 1 metre away from a
wall or mast for maximum performance.
2.1.6 Collinear antennas
Collinear antennas transmit the same amount of radio power in all directions
horizontally, and are easy to install and use. They provide gain by compressing the
radiated signal to a flattened disc shape, and reducing the amount of signal radiated
above and below the horizontal plane. You can use collinear antennas to
Compensate for the losses in long lengths of coaxial cable in WL-TX-900
Transmitters.
Increase receiver sensitivity in WL-RX-900 Receivers.
Collinear antennas are generally used at a central site with more than one remote site.
They are similar in appearance to dipole antennas; however the antenna is longer.
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