Antenna Requirements - Huawei ME909u-523 Hardware Manual

HUAWEI ME909u-523 LTE LGA Module
Hardware Guide
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, you 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 ME909u-523 module must fulfill the following requirements:
Antenna Requirements
Frequency range
Bandwidth of primary
antenna
Bandwidth of
secondary antenna
Bandwidth of GPS
antenna
Gain
Impedance
VSWR absolute max
VSWR recommended
Issue 01 (2014-05-24)
Depending on frequency band(s) provided by the network
operator, the customer must use the most suitable
antenna for that/those band(s)
140 MHz in WCDMA Band II /LTE Band 2
445 MHz in WCDMA Band IV /LTE Band 4
70 MHz in WCDMA Band V /LTE Band 5
42 MHz in LTE Band 17
60 MHz in WCDMA Band II /LTE Band 2
45 MHz in WCDMA Band IV /LTE Band 4
25 MHz in WCDMA Band V /LTE Band 5
12 MHz in LTE Band 17
35 MHz in GNSS
≤ 2.5 dBi
50 Ω
≤ 3:1(≤ 2:1 for GPS antenna)
≤ 2:1(≤ 1.5:1 for GPS antenna)
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RF Specifications
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