Antenna Installation
The type and location of the antenna used can have a profound effect on your overall system performance and its legality.
In point to point links it is good practice to make efficient use of the radio spectrum by selecting an antenna that will project the R.F energy into the direction of desired operation and similarly at the receiver to collect transmissions only from the location of the transmitter.
(Directional yagi antenna (vertically polarised)) | (Directional yagi antenna (vertically polarised) |
In polled systems, where there is a central base station, the base station will need an
| (Directional yagi antenna (vertically polarised) |
For mobile systems the only practical choice is to use
It is very important that all antennas in a system share the same polarisation otherwise losses of up to 30dB may be encountered.
Note: Polarisation can be put to good use when it is desirable to reject an unwanted transmission on the same or a similar frequency.
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