Service Guide

LTE Standard Module Series
EG91_Series_Hardware_Design
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5.2. GNSS Antenna Interface
The GNSS antenna interface is only supported on EG91-NA/-VX/-EX/-NAX/-NAXD/-NAXDL/-AUX/-NAL.
The following tables show pin definition and frequency specification of GNSS antenna interface.
Table 25: Pin Definition of GNSS Antenna Interface
Table 26: GNSS Frequency
A reference design of GNSS antenna is shown as below.
GNSS
Antenna
VDD
Module
ANT_GNSS
47 nH
10R
0.1 μF
0R
NM
NM
100 pF
Figure 31: Reference Circuit of GNSS Antenna
Pin Name Pin No. I/O Description Comment
ANT_GNSS
(EG91-AUX/-EX/-NA/-NAL/-NAX/-NAXD
/-NAXDL/-VX)
49 AI GNSS antenna 50 Ω impedance
Type Frequency Unit
GPS 1575.42 ±1.023 MHz
GLONASS 1597.5–1605.8 MHz
Galileo 1575.42 ±2.046 MHz
BeiDou 1561.098 ±2.046 MHz
QZSS 1575.42 MHz