Interference; Antenna Requirements - Huawei ME906s LTE M.2 Hardware Manual

HUAWEI ME906s LTE M.2 Module
Hardware Guide
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ECC of the antenna
ECC is short for Envelope Correlation Coefficient. It is the cross-correlation value of
the complex patterns of the master and diversity antenna. It indicates how similar the
magnitude and the phase patterns of the two antennas are. If two antennas have no
similarity, the ECC should be zero. Actually, the less ECC, the better diversity
performance.
The following ECC is recommended for ME906s.
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4.5.2 Interference

Besides the antenna performance, the interference on the user board also affects the
radio performance (especially the TIS) of the module. To guarantee high performance
of the module, the interference sources on the user board must be properly
controlled.
On the user board, there are various interference sources, such as the LCD, CPU,
audio circuits, and power supply. All the interference sources emit interference
signals that affect the normal operation of the module. For example, the module
sensitivity can be decreased due to interference signals. Therefore, during the
design, need to consider how to reduce the effects of interference sources on the
module. You can take the following measures: Use an LCD with optimized
performance; shield the LCD interference signals; shield the signal cable of the
board; or design filter circuits.
Huawei is able to make technical suggestions on radio performance improvement of
the module.

4.5.3 Antenna Requirements

The antenna for ME906s must fulfill the following requirements:
Table 4-5 Antenna Requirements
Antenna Requirements
Frequency range
Issue 05 (2019-03-25)
Gain of the primary antenna ≤ 2.5 dBi
Gain of the secondary antenna ≤ 2.5 dBi
ECC ≤ 0.5 (working frequency below 0.96 GHz)
ECC ≤ 0.3 (working frequency above 1.4 GHz)
 The antenna consists of the antenna body and the relevant RF transmission cable. Take
the RF transmission cable into account when measuring any of the preceding antenna
indicators.
 Huawei cooperates with various famous antenna suppliers who are able to make
suggestions on antenna design, for example, Amphenol, Skycross, etc.
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Copyright © Huawei Technologies Co., Ltd.
Depending on frequency band(s) provided by the
network operator, the customer must use the most
suitable antenna for that/those band(s)
RF Specifications
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