Hardware Guide

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FIBOCOM SQ808-NA Hardware Guide Page 58 of 78
The power of the active antenna is fed from the antenna's signal line through a 56nH inductor. Common
active antennas supply power from 3.3V to 5.0V. The active antenna itself consumes very little power,
but requires a stable and clean power supply. It is recommended that a high-performance LDO be used
to power the antenna. The active antenna gain requirement is <17db. If the gain is> 17db, the reserved
π-type matching needs to be used to increase the attenuation network.
4.4 Antenna Requirement
The module provides four antenna interfaces: main, diversity, WIFI/BT and GNSS. The antenna
requirements are as follows:
Table 4-7 Antenna requirements
Module Antenna Requirements
Standard
Antenna requirements
GSM/WCDMA /LTE
VSWR: ≤ 2
Max input power (W): 5
Input impedance (Ω): 50
Polarization type: vertical direction
Insertion loss: < 1dB (0.6-1GHz)
Insertion loss: < 1.5dB(1.4-2.2GHz)
Insertion loss: < 2dB (2.3-2.7GHz)
WIFI/BT
VSWR: ≤ 2
Max input power (W): 5
Input impedance (Ω): 50
Polarization type: vertical direction
Insertion loss: < 1dB
GNSS
Frequency range: 1559MHz~1607MHz
Polarization type: right-circular or linear polarization
VSWR: < 2 (typical)
gain: 2 dBi