Product specifications

GSP-1620 Modem Product Specification
80-99240-1 Rev. D 5-23
Mounting Multiple Antennas
If required for the application, OEMs can mount multiple
antennas within several feet of each other without creating
significant interference.
QUALCOMM testing has determined that if two antennas
are placed near each other and transmit on different
frequencies, only a barely perceptible (1 dB or less) increase
in 1605 emission occurs when tested at full jamming power.
This maps to isolation between antennas of 20 dB. Even for
antennas whose bases were touching (zero inches separation)
the isolation was 22 dB in the worst case of rotation with
respect to one another.