Antenna Interface; Gsm/Umts Antenna Interface; Pin Definition; Operating Frequency - Quectel UC20 Hardware Design

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
ANT_MAIN
ANT_DIV

5.1.2. Operating Frequency

Table 24: The Module Operating Frequencies
Band
GSM850
EGSM900
DCS1800
PCS1900
UMTS 2100
UMTS 1900
UC20_Hardware_Design
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Pin No. I/O
49 IO
35 AI
Receive
869 ~ 894
925 ~ 960
1805 ~ 1880
1930 ~ 1990
2110 ~ 2170
1930 ~ 1990
Confidential / Released
UMTS/HSPA Module Series
Description
Main antenna
Diversity antenna
Transmit
824 ~ 849
880 ~ 915
1710 ~ 1785
1850 ~ 1910
1920 ~ 1980
1850 ~ 1910
UC20 Hardware Design
Comment
50Ω impedance
50Ω impedance
Unit
MHz
MHz
MHz
MHz
MHz
MHz
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