Warning: Impedance of antenna connector and RF cable must be matched to 50
Ohm: mismatch will affect RF performance; especially high insertion loss of RF
cable will cause Tx power and Rx sensitivity degradation.
Warning: The FN990 should be located away from noise sources: RF cables and
antennas should be installed away from noise sources such as SMPS, USB/PCIe
interfaces, etc.
Antenna Installation Guidelines
•
Each antenna must be installed with 20dB isolation.
•
Install the antenna in a location with access to the network radio signal.
•
The Antenna must not be installed inside metal cases.
•
The Antenna must be installed according to the antenna manufacturer
instructions.
•
Antenna integration should optimize Radiation Efficiency. Efficiency values
> 50% are recommended on all frequency bands.
•
Antenna integration should not perturb the radiation pattern described in
the Antenna manufacturer documentation.
•
It is preferable to get an omnidirectional radiation pattern.
•
To meet the related EIRP limitations, antenna gain must not exceed the
values indicated in regulatory requirements, where applicable. The Typical
antenna Gain in most M2M applications does not exceed 2dBi.
•
If the device antenna is located farther than 20 cm from the human body
and there are no co-located transmitters, then the Telit FCC/IC approvals
can be re-used by the end product.
•
If the device antenna is located closer than 20 cm from the human body or
there are co-located transmitters, then additional FCC/IC testing may be
required for the end product (Telit FCC/IC approvals cannot be reused).
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