Rf Antenna Interface - Huawei ME909u-521 Hardware Manual

HUAWEI ME909u-521 LTE LGA Module
Hardware Guide

JTAG reset pin of ME909u-521 module is different from HUAWEI's other LGA
modules, for example: MU509, MC509 and MU609.

JTAG_SRST_N must be dealt with ESD protection as follow. The 1 kΩ resistor and
4.7 nF capacitor must be placed as close as possible to ME909u-521 module.
Figure 3-18 ESD protection of JTAG_SRST_N

3.11 RF Antenna Interface

The ME909u-521 module provides three antenna pads (MAIN_ANT, GPS_ANT and
AUX_ANT) for connecting the external antennas.
The RF pad difference is the most important difference between HUAWEI LGA
modules, please refer to HUAWEI 30 mm x 30 mm LGA Module Hardware Migration
Guide.
Route the antenna pad as close as possible to antenna connector. In addition, the
impedance of RF signal traces must be 50 Ω.
Issue 05 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
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