WisLink-Cellular RAK2011
V 1.0 | Aug. 2018
Author:
Gan, Penn
Approval:
Ken Yu
21
of
28
3.2.4
GPS Antenna Parameter
Antenna specifications are listed in the table below:
Item
Specifications
Post Environmental
Tolerance
Range of Receiving Frequency
1575.42±1.1
±2.5
Center Frequency (MHz) w/ 30mm
2
GND
plane
1575.42
±3.0
Bandwidth (MHz) (Return Loss ≤ -10dB)
≥10
±0.5
VSWR (in Center Frequency)
≤2.0
±0.5
Gain (Zenith) (dBi Typ) w/ 70mm
2
GND Plane
4.5
±0.5
Axial Ratio (dB) w/ 70mm
2
GND Plane
3.0
±0.2
Polarization
Righ-Handed Circular
-
Impedance (Ω)
50
-
Frequency Temparature Coefficient (ppm/ºC)
0±10
-
Amplifier Specifications are listed in the table below:
Environmental test performance specifications are listed below:
Item
Normal Temperature
High Temperature
1
Low Temperature
2
Amplifier Gain
27dB ± 2.0
27dB ± 2.0
27dB ± 2.0
VSWR
≤ 2.0
≤ 2.0
≤ 2.0
Noise Coefficient
≤ 2.0
≤ 2.0
≤ 2.0
1.
High
temperature test: soap in temperature (85º C) and humidity (95%) chamber for 24-hour and return to normal
temperature (at least for 1-hour) without visual shape change.
2.
Low temperature test: soap in temperature (-40º C) chamber for 24-hour and return to normal temperature (at least for
1-hour) without visual shape
change.
Item
Specifications
Frequency Range
1575.42MHz
Gain
27dB
VSWR
≤2.0V
Noise Coefficient
≤2.0dBm
DC Voltage
3 ~ 5V
DC Current
5 ± 2mA
