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HUAWEI MU739 HSPA+ LGA Module
Hardware Guide
4.6.2 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, 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.
4.6.3 GSM/WCDMA Antenna Requirements
The antenna for MU739 must fulfill the following requirements:
GSM/WCDMA Antenna Requirements
Frequency range
Bandwidth
Gain
Impedance
Input power
VSWR absolute max
VSWR recommended
Furthermore if the device is developed for the US and/or Canada market, it must
comply with the FCC and/or IC requirements:
This device is to be used only for mobile and fixed application. The antenna(s) used
for this transmitter must be installed to provide a separation distance of at least 20cm
Issue 01 (2011-08-24)
Depending on frequency band(s) provided by the network
operator, the customer must use the most suitable
antenna for that/those band(s)
70 MHz in GSM850
80 MHz in GSM900
170 MHz in DCS
140 MHz PCS
70 MHZ in WCDMA850
80 MHz in WCDMA900
445 MHz in WCDMA1700 (AWS)
140 MHz in WCDMA1900
250 MHz in WCDMA2100
Gain < 3 dBi
50-ohm
> 33 dBm (2 W) peak power in GSM
> 24 dBm Average power in WCDMA
<= 5
<= 2:1
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
RF Specifications
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