Aastra Ascotel IntelliGate A150 System Manual page 18

Ascotel® DECT System
Fig. 10: Example 1: Omni-directional gain antenna
The second example of an antenna, which radiates directionally both horizontally
and vertically, is called a corner reflector antenna. It is ideally suited for covering
distant remote buildings or areas.
Fig. 11: Example 2: Corner reflector antenna
The same principle applies to all antenna types: The narrower the horizontal and
vertical radiation range, the greater the distances that can be covered. In this
connection we talk of antenna gain, which indicates the ratio of the energy radiated
in a particular angle to the radiated energy of a standard antenna (usually a λ/2
dipole antenna). An extreme example of this is the radio relay antenna, which is
used for transmitting radio signals in a targeted direction from one point to the
next.
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Radiation pattern in relative field strength
Horizontal
Radiation pattern in relative field strength
Horizontal
Vertical
Vertical
Planning DECT systems