Page 19 of 41
iFleetONE™ Terminal Installation Manual
The table below gives the recommended minimum distance
d
between X- and S-
band radars and the antenna. Antenna damage is normally avoided by ensuring the
separation distance is met or exceeded.
Antenna location at the minimum distance from Radar (S-Band)
Radar
Power
Min distance (d) at ±15
⁰
vertical
separation
min distance (d) at ±60
⁰
vertical
separation
0 - 12 kW
0.5 m
0.3 m
30 kW
1.0 m
0.5 m
50 kW
2.0 m
1.0 m
Antenna location at the minimum distance from Radar (X-Band)
Radar
Power
min distance (d) at ±15
⁰
vertical
separation
min distance (d) at ±60
⁰
vertical
separation
0 - 12 kW
0.9 m
0.5 m
30 kW
2.4 m
1.2 m
50 kW
4.0 m
2.0 m
Transmitting Equipment < 1GHz
HF and VHF transmitters can also interfere with the performance of the antenna and
also damage the antenna if placed too close. The table below gives guidelines for the
minimum distance between the antenna and HF and VHF transmitters.
Antenna location at the minimum distance from HF / VHF
Type
Power
Distance
HF < 60MHz
100 W
1.0 m
HF < 60 MHz
500 W
2.5 m
VHF > 60 MHz
25 W
1.5 m
VSAT System
For optimum performance the distance between the antenna and VSAT antennas
should be at least 3 meters.
GPS Antenna
As the antenna transmits power close to the GPS receive band, the minimum
distance to GPS antennas is typically 5 meters.
Other L-Band Systems
Typical L-Band satellite communication equipment should be able to operate in close
proximity without loss of performance (Refer to Section 2.1.4 Distance to obstruction
objects). Importantly such equipment typically includes GPS antennas, and that it can
be necessary to use the typical minimum separation distance of typically 5 meters.
