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3.
RF Specifications
The EM7690 includes Four MHF4 RF connectors for use with host-supplied antennas
Figure 3-1
Module Connectors Include Image with Spacing Info
LTE/WCDMA/GNSS connectors:
Main: Primary Tx/PRx path for 3G/4G
Auxiliary: Diversity Rxand GNSS L1
MIMO1: MIMO1 Rx Path
MIMO2: MIMO2 Rx Path and GNSS L5
3.1.
RF Connections
When attaching antennas to the module:
LTE/WCDMA/GNSS connectors:
Use RF plug connectors that are compatible with the following RF receptacle connectors:
I-PEX (20449-001E (MHF4)).
Match coaxial connections between the module and the antenna to 50Ω.
Minimize RF cable losses to the antenna; the recommended maximum cable loss for antenna
cabling is 0.5 dB.
To ensure best thermal performance, use the ground hole (if possible) to attach (ground) the
device to a metal chassis.
Note:
If antenna connection is shorted or open, the modem will not sustain permanent damage.
3.1.1.
Shielding
The module is fully shielded to protect against EMI and must not be removed.
411139xx
202041113915
Rev 0.1
Rev 0.3
September 23,
September 23, 2020
3
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