Antenna Interface Design Guide - Huawei MU509 Hardware Migration Manual

HUAWEI 30 mm × 30 mm LGA Module
Hardware Migration Guide

2.5.2 Antenna Interface Design Guide

To implement compatibility among the Huawei 30 mm × 30 mm LGA modules, pay
attention to antenna interfaces pin 107 (MAIN_ANT), pin 111 (GPS_ANT), and pin
115 (AUX_ANT).
Pay attention to the interface differences among the MU509 and other 30 mm × 30
mm LGA modules.
Table 2-12 Differences of the antenna interface in pad size and function
Pin Interface Name
No.
107, Antenna ANT
111 pad size
interface
and
ANT
115
function
RF Signal Trace in the Main Board Design of Customers
It is recommended that you design antenna interfaces as follows:



Issue 08 (2016-12-12)
MU509
1.5 mm × 1.0 mm
Main (pin 107)
The antenna signal trace must be as short as possible, and controlled with 50 Ω
impedance.
The antenna interfaces pin 107, pin 111, and pin 115 should be also controlled
with 50 Ω impedance.
A π matching network must be reserved for radio frequency (RF) trace between
output pins of MAIN_ANT, AUX_ANT, and GPS_ANT and antenna interfaces.
There is an example of the matching network for MAIN_ANT as shown in Figure
2-17 .The components of G_C1, G_L1, and G_L2 compose a π matching
network. The G_C2 is for DC blocking and matching design. The matching
network for AUX_ANT and GPS_ANT are the same as the MAIN_ANT.
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Copyright © HUAWEI Technologies Co., Ltd.
MC509 MU609 ME909u
1.02 mm × 0.82 mm
Main (pin 107),
AUX (pin 115),
GPS (pin 111)
LGA Interface Differences
ME209u- MU709 ME909s
526
Main (pin 107), Main (pin
107),
AUX (pin 115)
AUX (pin
115)
33