Quectel UC20

UMTS/HSPA Module Series
UC20 Hardware Design
UC20_Hardware_Design Confidential / Released 55 / 82
5 Antenna Interface
UC20 antenna interface includes a main GSM/UMTS antenna, an optional UMTS Rx-diversity antenna,
which is used to improve UMTS’s receiving performance, and a GNSS antenna. The antenna interface
has an impedance of 50Ω.
5.1. GSM/UMTS Antenna Interface
5.1.1. Pin Definition
The main antenna and UMTS Rx-diversity antenna pins definition are shown below.
Table 23: Pin Definition of the RF Antenna
Pin Name
Pin No.
I/O
Description
Comment
ANT_MAIN
49
IO
Main antenna
50Ω impedance
ANT_DIV
35
AI
Diversity antenna
50Ω impedance
5.1.2. Operating Frequency
Table 24: The Module Operating Frequencies
Band
Receive
Transmit
Unit
GSM850
869 ~ 894
824 ~ 849
MHz
EGSM900
925 ~ 960
880 ~ 915
MHz
DCS1800
1805 ~ 1880
1710 ~ 1785
MHz
PCS1900
1930 ~ 1990
1850 ~ 1910
MHz
UMTS 2100
2110 ~ 2170
1920 ~ 1980
MHz
UMTS 1900
1930 ~ 1990
1850 ~ 1910
MHz
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