Reference Design Of Rf Antenna Interfaces; Gnss Antenna Interface - Quectel EC200U Series Hardware Design

4.1.3. Reference Design of RF Antenna Interfaces

A reference design of ANT_MAIN and ANT_BT/WIFI_SCAN is shown as below. A π-type matching circuit
should be reserved for better RF performance. The capacitors are not mounted by default.
NOTE
1. In order to improve the receiving sensitivity, it is necessary to ensure the proper distance between
the main antenna and Wi-Fi Scan/Bluetooth receiving antenna.
Place the π-type matching components (R1 & C1 & C2 and R2 & C3 & C4) as close to the antenna
2.
as possible.

4.2. GNSS Antenna Interface

The following tables list the pin definition and frequency characteristics of the GNSS antenna interface
respectively.
Table 37: Pin Definition of GNSS Antenna Interface
Pin Name Pin No.
EC200U_Series_Hardware_Design
Module
ANT_MAIN
ANT_BT/WIFI
_SCAN
Figure 29: Reference Circuit of RF Antenna Interfaces
I/O
Main
antenna
R1 0R
C2
C1
NM
NM
Wi-Fi Scan/
Bluetooth
antenna
R2 0R
C4
C3
NM
NM
Description
LTE Standard Module Series
Comment
61 / 94