Antenna Interface; Rf Reference Design - Quectel M35 User Manual

4

Antenna Interface

The Pin 39 is the RF antenna pad. The RF interface has an impedance of 50Ω.
Table 21: Pin Definition of the RF_ANT
Name
GND
GND
RF_ANT
GND
4.1.

RF Reference Design

The reference design for RF is shown as below.
M35 provides an RF antenna pad for antenna connection. The RF trace in host PCB connected to the
module RF antenna pad should be coplanar waveguide line or microstrip line, whose characteristic
impedance should be close to 50Ω. M35 comes with grounding pads which are next to the antenna pad in
M35_User_Manual
Pin
37
38
39
40
RF_ANT
Module
Figure 41: Reference Design for RF
Confidential / Released
GSM/GPRS Module Series
Description
Ground
Ground
RF antenna pad
Ground
0R
NM NM
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