Antenna Interface; Module Rf Output Power; Module Rf Receive Sensitivity; Module Operating Frequencies - SimCom SIM900D Hardware Design

SIM900D Hardware Design

4 Antenna Interface

SIM900D provides RF antenna interface. And customer's antenna should be located in the customer's main board
and connect to module's antenna pad through microstrip line or other type RF trace which impendence must be
controlled in 50Ω. The Pin 33 is the RF antenna pad.
SIM900D material properties:
SIM900D PCB Material: FR4
Antenna pad: Gold plated pad

4.1 Module RF Output Power

Table25: SIM900D conducted RF output power
Frequency
GSM850
EGSM900
DCS1800
PCS1900

4.2 Module RF Receive Sensitivity

Table26: SIM900D conducted RF receive sensitivity
Frequency Receive sensitivity（Typical）
GSM850 -109dBm
EGSM900 -109dBm
DCS1800 -109dBm
PCS1900 -109dBm

4.3 Module Operating Frequencies

Table27: SIM900D operating frequencies
Frequency
GSM850
EGSM900
DCS1800
PCS1900
SIM900D_Hardware Design_V1.04
Max
33dBm ±2db
33dBm ±2db
30dBm ±2db
30dBm ±2db
Receive
869 ～ 894MHz
925 ～ 960MHz
1805 ～ 1880MHz
1930 ～ 1990MHz
Min
5dBm±5db
5dBm±5db
0dBm±5db
0dBm±5db
Receive sensitivity(MAX)
-107dBm
-107dBm
-107dBm
-107dBm
Transmit
824 ～ 849 MHz
880 ～ 915MHz
1710 ～ 1785MHz
1850 ～ 1910MHz
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2010.10.09