User's Manual

LE910 V2 HARDWARE USER GUIDE 1VV0301200 Rev.2 Preliminary • 2015-08-04 63 of 81
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When using the LE910 V2, since there's no antenna connector on the module, the diversity antenna must be
connected to the LE910 V2 Diversity Antenna pad (F1) by means of a transmission line implemented on the PCB.
The second Rx antenna should not be located in the close vicinity of main antenna. In order to improve Diversity
Gain, Isolation and reduce mutual interaction, the two antennas should be located at the maximum reciprocal
distance possible, taking into consideration the available space into the application. For the same reason, the Rx
antenna should also be cross-polarized with respect to the main antenna.
Isolation between main antenna and Rx antenna must be at least 10 dB in all uplink frequency bands.
Envelope Correlation Coefficient (ECC) value should be as close as possible to zero, for best diversity
performance. ECC values below 0.5 on all frequency bands are recommended.