Gnss Antenna Interface - Quectel UC20 Manual

NOTE
Keep a proper distance between main antenna and diversity antenna to improve the receiving sensitivity.

5.2. GNSS Antenna Interface

The following tables show the GNSS antenna pin definition and frequency specification.
Table 27: Pin Definition of GNSS Antenna
Pin Name Pin No.
ANT_GNSS 47
VDD_2V85 34
UC20_Hardware_Design
ANT_MAIN
ANT_DIV
Module
Figure 34: Reference Circuit of Antenna Interface
I/O Description
AI GNSS antenna
PO Power for external LNA or
Confidential / Released
R1 0R
C2
C1
NM
NM
R2 0R
C4
C3
NM
NM
UMTS/HSPA Module Series
UC20 Hardware Design
Main
antenna
Diversity
antenna
Comment
50Ω impedance
Vnorm=2.85V
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