Quectel M35 - Antenna Interface; Pin Definition of the RF_ANT; RF Reference Design

GSM/GPRS Module Series
M35 User Manual
M35_User_Manual Confidential / Released 61 / 85
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
4.1. RF Reference Design
The reference design for RF is shown as below.
Module
RF_ANT
0R
NM NM
Figure 41: Reference Design for RF
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
Name
Pin
Description
GND
37
Ground
GND
38
Ground
RF_ANT
39
RF antenna pad
GND
40
Ground