US Robotics USR3520 User Manual page 92

Maximum VSWR

< 2.5:1 with 50 ohm reference impedance
Polarization

RHCP antenna or a vertical polarized antenna
Frequency range

Frequency range for GPS: 1575.42MHz ± 1MHz
Efficiency

Efficiency: > 50%.
WLAN interface
The WLAN antenna is labelled WLAN Main on the bottom back panel.
recommendations.
For the Wi-Fi expansion card the following parameters are required for the antenna:
Connector

The RF connector on the Wi-Fi expansion card is an RP-SMA female connector

The RF connector on the Wi-Fi antenna should be an RP-SMA male connector
Frequency range

2.4 Ghz

5 Ghz
The integrator should only choose the frequencies he would like to use.
Performance

Radiation pattern: Omni-directional

Efficiency over all used frequencies: > 50%

Maximum VSWR: < 2.5:1 with 50 ohm reference impedance
Polarization

Linear
Revision: 1.00 Copyright 2015 U.S. Robotics Corporation
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