Rainbow Electronics MG260 - Manual (Page 76)

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.