User guide

TD 92422GB

18 February 2010 / Ver. E

System Planning

Ascom IP-DECT System

9.3.2 Directional Antennas

It is possible to use directional antennas in small corridors and halls. Give careful

consideration to the type of antenna that you intend using for your application: why that

antenna in particular? The fact is that there are many different types of antenna, all with a

different radiation pattern. It is difficult to summarize the type of antenna and the

application; it is often a question of experience and empiricism. It may be, for example,

that you achieve the best result by mounting the base stations on the ceiling, allowing the

antennas to radiate vertically downwards. It is possible that you need a beam that is very

directional horizontally but has a wider radiation pattern vertically (for example, an

extremely high hall), or precisely the opposite. It is advisable to consider this before

carrying out the measurement, but the fact remains that you must always carry out a

measurement to ensure the best possible operation.