Quectel EC25-V - Antenna Interface; Main;Rx-diversity Antenna Interface; Pin Definition

LTE Module Series
EC25-V User Manual
EC25-V_User_Manual Confidential / Released 47 /
69
5 Antenna Interface
EC25 antenna interface includes a main antenna, an Rx-diversity antenna which is used to resist the fall
of signals caused by high speed movement and multipath effect, and a GNSS antenna. The antenna
interface has an impedance of 50ohm.
5.1. Main/Rx-diversity Antenna Interface
5.1.1. Pin Definition
The main antenna and Rx-diversity antenna pins definition are shown below.
Table 22: Pin Definition of the RF Antenna
Pin Name
Pin No.
I/O
Description
Comment
ANT_MAIN
49
IO
Main antenna
50ohm impedance
ANT_DIV
35
AI
Receive diversity antenna
50ohm impedance
5.1.2. Operating Frequency
Table 23: The Module Operating Frequencies
3GPP Band
Transmit
Receive
Unit
B4
1710 ~ 1755
2110 ~ 2155
MHz
B13
777 ~ 787
746 ~ 756
MHz
5.1.3. Reference Design
The reference design of ANT_MAIN and ANT_DIV antenna is shown as below. It should reserve a π-type
matching circuit for better RF performance. The capacitors are not mounted by default.