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UMTS/HSPA Module Series

UC20 Hardware Design

UC20_Hardware_Design Confidential / Released 56 / 82

UMTS 900

925 ~ 960

880 ~ 915

MHz

UMTS 850

869 ~ 894

824 ~ 849

MHz

UMTS 800

875 ~ 885

830 ~ 840

MHz

5.1.3. Reference Design

The reference design of main antenna and UMTS Rx-diversity antenna is shown as below. It should

reserve a π-type matching circuit for better RF performance. The capacitors are not mounted by default.

ANT_MAIN

R1 0R

Module

Main

antenna

R2 0R

Diversity

antenna

ANT_DIV

Figure 33: Reference Circuit of Antenna Interface

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

NOTE

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