User Guide

LM960 HW Design Guide
1VV0301485 Rev. 3 Page 50 of 74 2018-12-14
Antenna Diversity Requirements
Frequency range
Depending by frequency band(s) provided by the network
operator, the customer shall use the most suitable antenna for
that/those band(s)
The bands supported by the LM960 is provided in Section 2.2,
Product Variants and Frequency Bands.
Impedance 50
VSWR recommended  2:1
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.
GNSS Receiver
The LM960 integrates a GNSS receiver that could be used in Standalone mode and in A-
GPS (assisted GPS), according to the different configurations.
LM960 supports an active antenna.
Frequency range • Wide-band GNSS:
1559–1606 MHz recommended
• GPS:
2.046 MHz BW NB GPS (centered on 1575.42 MHz)
• Glonass (GLO):
~ 8.3 MHz BW (1597–1606 MHz)
• BeiDou (BDS):
4.092 MHz BW (1559.05 – 1563.14 MHz)
• Galileo (GAL):
4.092 MHz BW (centered on 1575.42 MHz)
Gain 1.5 dBi < Gain < 3 dBi
Impedance 50 Ohm
Amplification 18 dB < Gain < 21 dB
Supply Voltage 3.1 V
Current consumption 20 mA Typical