BandLuxe
®
M280 Series HSUPA Module Datasheet
17
2.7
Antenna Guidelines and RF Connection
This section describes general guidelines for the design of multi-band antenna required for the M280 module
series.
2.7.1
Antenna specifications
Frequency range
ó
GSM850 (824-894 MHz)
ó
EGSM900 (880-960 MHz)
ó
DCS1800 (1710-1880 MHz)
ó
PCS1900 (1850-1990 MHz)
ó
WCDMA 850/1900/2100 (824-894 / 1850-1990 / 1920-2170 MHz)
Gain
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Radiation pattern: omni-directional
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Gain averaged in space in all frequencies: > -3dBm
ó
Gain for Diversity Antenna
1.
Within 3 dB comparing to gain of primary antenna recommended
2.
No worse than 6 dB of gain of primary antenna
Maximum VSWR
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< 2.5:1 with 50 reference impedance
Polarization
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Linear
2.7.2
WLAN Antenna Isolation
Based upon the known isolation and the linear gain of the WLAN receiver there is a minimum requirement for
the out of band isolation in the GSM and UMTS bands. The isolation is depending upon the antenna isolation,
WLAN and mobile standard, the output power of the mobile, the linearity of the WLAN receiver IIP3 and the
front-end filter (blocking filter). Therefore it is preferred to use WLAN modules with blocking filter.
