4 antenna specifications, 1 gsm.dcs antenna, 2 gps antenna – Rainbow Electronics MG260 User Manual
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MG260 Product Specification
This document is the sole and exclusive property of FLYFOT. Not to be distributed or divulged without prior written
agreement.
3.4 Antenna specifications
3.4.1 GSM.DCS Antenna
A GSM/DCS dual-band antenna shall work in these frequency bands and have
the following characteristics:
Characteristics
E-GSM 900
DCS 1800
Frequency TX
880 to 915 MHz
1710 to 1785 MHz
Frequency RX
925 to 960 MHz
1805 to 1880 MHz
Impedance
50 Ohms
1.5 : 1
VSWR
Rx max
Tx max
1.5 : 1
Polarization
Linear
Typical radiated gain
0 dBi in one direction at least
Note: FLYFOT recommends a VSWR max. of 1.5:1 for the Rx and the Tx.
All aspects of this specification will be fulfilled even with a VSWR max. of 2:1 for the
Rx and the Tx.
3.4.2 GPS antenna
The GPS antenna must fulfill the following requirements:
Characteristics
GPS
Frequency RX
1575.42 MHz +/-1.023 MHz
Impedance
50 Ohms
VSWR Rx max
1.5 : 1
Polarization
RHCP
Antenna gain
15 dB typ.
45 dB max.
Typical radiated gain
5 dBi in one direction at least
Supply voltage
3 V or 5 V
Supply current
50 mA max. for external supply
(GPS_VANT input)
Note:
e If a classical patch antenna is followed by an LNA, care must be taken
when placing the antennas: the DCS1800 transmission can saturate the
GPS thus decreasing the GPS performances.