Quectel EC25-V - Reference Design; GNSS Antenna Interface

LTE Module Series
EC25-V User Manual
EC25-V_User_Manual Confidential / Released 48 /
69
ANT_MAIN
R1 0R
C1
Module
Main
antenna
NM
C2
NM
R2 0R
C3
Diversity
antenna
NM
C4
NM
ANT_DIV
Figure 27: Reference Circuit of Antenna Interface
1. Keep a proper distance between the main antenna and the Rx-diversity antenna to improve the
receiving sensitivity.
2. ANT_DIV function is enabled by default. Use the AT command AT+QCFG="diversity",0 can disable
receive diversity.
5.2. GNSS Antenna Interface
The following tables show the GNSS antenna pin definition and frequency specification.
Table 24: Pin Definition of GNSS Antenna
Pin Name
Pin No.
I/O
Description
Comment
ANT_GNSS
47
AI
GNSS antenna
50ohm impedance
NOTES