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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

Main antenna

50Ω impedance

ANT_DIV

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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