ZTE Corporation MG2636 Manuale Utente

 

                                                                        MG2636 module 

                                                                                                     

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The RF interface of the MG2636 Module has an impedance of 50 . The module is capable of sustaining a 

total mismatch at the antenna connector or pad without any damage, even when transmitting at maximum RF 
power. 

The external antenna must be matched properly to achieve best performance regarding radiated power, 

DC-power consumption, modulation accuracy and harmonic suppression. Antenna matching networks are not 
included on the MG2636 Module PCB and should be placed in the host application. 

Regarding the return loss, the Module provides the following values in the active band: 

                                                Table 6-1 Return Loss in the Active Band 

 

Receive

≥ 8dB

≥ 12dB

Transmit

 

not applicable

≥ 12dB

The connection of the antenna or other equipment must be de coupled from DC voltage. This is 

necessary because the antenna connector is DC coupled to ground via an inductor for ESD protection. 

To suit the physical design of individual applications, the MC2261 offers two alternative approached to 

connecting the antenna: 

■ Recommended approach: 

MM9329-2700B 

antenna connector manufactured by 

MURATA 

assembled on 

the component side of the PCB (top view on Module). See Section 4.3 for details. 

■ Antenna pad and grounding plane placed on the bottom side. See Section 4.2 for details. 

The 

MM9329-2700B 

connector has been chosen as antenna reference point (ARP) for the ZTEMT 

reference equipment submitted to type approve the MG2636 Module. All RF data specified throughout 
this manual are related to the ARP. For compliance with the test results of the ZTEMT type approval 
you are advised to give priority to the connector, rather than using the antenna pad. 

Note: Both solutions can be applied alternatively. This means,if the antenna is connected to the pad, then 

the connector on the Module must be left empty,and when the antenna is connected to the Module connector, 
the pad is useless, 
 

The antenna pad of the module is soldered to the board on the customer design to connect with RF line. 
For proper grounding connect the RF line to the ground plane on the bottom of the MG2636 Module 

which must be connected to the ground plane of the application. 

Consider that according to GSM recommendations as 50Ω connector is mandatory for type approval 

measurements. It must be ensured that the RF line which is connected to antenna pad should be controlled on 
50Ω. 
 
 

■ To prevent damage to the Module and to obtain long-term solder joint properties, you are advised to 

maintain the standards of good engineering practice for soldering.