LE910C1 Hardware User Guide
1VV0301298 Rev. 1.08 - 2017-11-14
Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved
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• If EM-noisy devices are not present around the line, geometries like Micro strip or
Grounded Coplanar Waveguide are preferred because they typically ensure less
attenuation compared to a Strip line having the same length.
7.3. GSM/WCDMA/LTE Antenna – Installation Guidelines
• Install the antenna in a location with access to the network radio signal.
• The antenna must be installed such that it provides a separation distance of at least 20 cm
from all persons and must not be co-located or operating in conjunction with any other
antenna or transmitter.
• The antenna must not be installed inside metal cases.
• The antenna must be installed according to the antenna manufacturer’s instructions.
7.4. Antenna Diversity Requirements
This product includes an input for a second Rx antenna to improve radio sensitivity. The function
is called Antenna Diversity.
Table 20: Antenna Diversity Requirements
Frequency range The customer must use the most suitable antenna band width for
covering the frequency bands provided by the network operator
and also supported by the car OEM while using the Telit module.
The bands supported by each variant of the LE910C1 module
family are provided in Section 2.6.1, RF Bands per Regional Variant
Impedance 50Ω
VSWR recommended ≤ 2:1
Since there is no antenna connector on the LE910C1 module, the antenna must be connected to
the LE910C1 diversity antenna pad (F1) by means of a transmission line implemented on the PCB.
If the antenna is not directly connected at the antenna pad of the LE910C1, a PCB line is required
to connect to it or to its connector.
The second Rx antenna must not be located in close vicinity of the main antenna. To improve
diversity gain and isolation and to reduce mutual interaction, the two antennas should be located
at the maximum reciprocal distance possible, taking into consideration the available space within
the application.
NOTE:
If Rx Diversity is not used/connected, disable the Diversity functionality using the AT#RXDIV
command (refer to the AT User guide) and leave the Diversity pad F1 unconnected.
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