User's Manual

Sports Arena
A 2000 spectators sports arena with metallic roof had an indoor signal
strength too low to provide a fair service in most parts of the arena. The
nearest base station was 8 kilometers away and it was equipped with one
carrier only.
A donor antenna directed towards the base station was mounted on a
mast outside the building and a repeater was installed inside the building
with the service antenna on the arch vault. The scenario is illustrated in
Figure 2-3.
The antenna isolation was measured to over 85dB.
Measured levels: Received signal level – 80.0 dBm
Donor antenna gain 15.0 dBi
Cable loss
–
5.0 dB
Repeater input level – 70.0 dBm
Adjusted repeater gain 75.0 dB
Repeater output level 5.0 dBm
Cable loss – 2.0 dB
Service antenna gain 7.0 dBi
Radiated output level 10.0 dBm
The signal strength was fair for service in the entire arena.
Service antenna
Donor antenna
Figure 2-3. Repeater in sports arena
ALLGON System AB AR Repeaters & OMT32 Hardware – Introduction
User’s Manual VD202 90/EN Rev. 1A 1999-07 2 - 5