Huawei MU709 Series Hardware Manual page 51

HUAWEI MU709 Series HSPA+ LGA Module
Hardware Guide
The linear polarization is recommended for the antenna of MU709.
Radiation Pattern
The radiation pattern of an antenna reflects the radiation features of the antenna in the
remote field region. The radiation pattern of an antenna commonly describes the
power or field strength of the radiated electromagnetic waves in various directions
from the antenna. The power or field strength varies with the angular coordinates (θ
and φ), but is independent of the radial coordinates.
The radiation pattern of half wave dipole antennas is omnidirectional in the horizontal
plane, and the incident waves of base stations are often in the horizontal plane. For
this reason, the receiving performance is optimal.
The following radiation patterns are recommended for the antenna of MU709.
Primary/diversity antenna: omnidirectional
In addition, the diversity antenna's pattern should be complementary with the primary
antenna's pattern.
Envelope Correlation Coefficient
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 MU709 LGA module.


Gain and Directivity
The radiation pattern of an antenna represents the field strength of the radiated
electromagnetic waves in all directions, but not the power density that the antenna
radiates in the specific direction. The directivity of an antenna, however, measures the
power density that the antenna radiates.
Gain, as another important parameter of antennas, correlates closely to the directivity.
The gain of an antenna takes both the directivity and the efficiency of the antenna into
account. The appropriate antenna gain prolongs the service life of relevant batteries.
The following antenna gain is recommended for MU709. Gain of the
primary/diversity antenna ≤ 2.5 dBi
Issue 09 (2017-12-15)
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 line. Take the
RF transmission line 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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RF Specifications
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