MeiG
Product
Manual
of
SLM750
Module
SLM750
Module
Hardware
Design
Page 60, total 84 pages
diversity antenna to improve WCDMA/TDD-LTE/FDD-LTE receiving performance of the product.
It is recommended that you use a 50
Ω
impedance antenna that matches the RF connector of the
module.
Special note: In order to ensure the communication ability of all frequency bands,
connect both the main and the auxiliary antennas.
It is suggested that you chose RF adapter carefully on application end. It is necessary to select
the smallest possible loss of the RF adapter, and the recommended RF adapters are as follows:
GSM900/850<1.5dB
DCS1800/PCS1900<1.5dB
CDMA/EVDO<1dB
WCDMA<1.5dB
TD-SCDMA<1.5dB
TD-LTE<1.5dB
FDD LTE<1.5dB
5.2 RF Reference Circuit
ANT_MAIN and ANT_DIV antenna connection reference design circuit are shown as below.
In order to gain better RF performance, you need to reserve n type matching circuit without
mounting capacitor.
