Quectel EG91 Series

LTE Standard Module Series
EG91 Series Hardware Design
EG91_Series_Hardware_Design 64 / 106
QZSS 1575.42 MHz
A reference design of GNSS antenna is shown as below.
Figure 35: Reference Circuit of GNSS Antenna
1. An external LDO can be selected to supply power according to the active antenna requirement.
2. If the module is designed with a passive antenna, then the VDD circuit is not needed.
5.3. Antenna Installation
5.3.1. Antenna Requirement
The following table shows the requirements on main antenna, Rx-diversity antenna and GNSS antenna.
Table 28: Antenna Requirements
Type Requirements
GNSS
1)
Frequency range: 1559MHz~1609MHz
Polarization: RHCP or linear
VSWR: < 2 (Typ.)
Passive antenna gain: > 0dBi
Active antenna noise figure: < 1.5dB
Active antenna gain: > 0dBi
Active antenna embedded LNA gain: < 17dB
NOTES