User Guide

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ME3630
Hardware Development Guide
3. ANTENNA INTERFACE
ME3630 antenna interface includes a main antenna, an Rx-diversity antenna and a GNSS antenna to improve receiving
performance. The antenna interface has an impedance of 50Ω.
3.1. PIN DEFINITION
The main antenna and Rx-diversity antenna pins definition are shown below.
Table 3–1 Pin Definition of Antenna
Pin Name
Pin NO.
I/O
Description
Comment
MAIN_ANT
62
IO
Main antenna
50Ω impedance
DIV_ANT
79
AI
Diversity antenna
50Ω impedance
GNSS_ANT
10
IO
GNSS antenna
50Ω impedance
3.2. REFERENCE DESIGN
The antenna is a sensitive device and its performance is greatly affected by external environments. The radiation performance
of the antenna is affected by the module dimensions, antenna position, occupied space size of the antenna, and the grounding of
surrounding components of the antenna. Besides, the fixed assembly of the antenna, the wiring of RF cables on the antenna, and the
fixed position of the antenna all affect the radiation performance of the antenna too.
The reference design of main antenna and Rx-diversity antenna is shown as below. It should reserve a double-L-type matching
circuit for better RF performance, and place these components as close as possible to the module. The capacitors are not mounted
by default.