Doc.No.1103 Rev.013 2016-08-16
Tel: +86-755-29644311 Fax: +86-755-29644383-816
Email: [email protected] Web:
www.gemsnav.com
Page 10 / 16
5. 2 Antenna
5.2.1 GPS antenna
（
Receiving antenna
）
: TIMING 4000
Mechanical characteristic:
Radome
material
ABS
Size
[mm]
Ø112×205
Weight
[Kg]
1.42
(including
GPS
clamp)
Operation
Temperature
[
℃
]
‐
40~+70
Reposition
Temperature
[
℃
]
‐
55~+75
Operating
Humidity
[%]
95
Operating
wind
speed
[Km/h]
135
Rater
Wind
Speed
[Km/h]
200
Circumstance
Outdoor
Function
:
Receive
satellite
signal
GPS
L1;
Electrical
parameter:
Frequency
[MHz]
1575.42±5
Gain[dBi]
38±2(LNA
included)
Polarization
Circular
polarization
Axial
ratio
[dB]
＜
5
3dB
beam
width(°)
110±10
Front
to
Back
Rario
[dB]
＞
10
DC
Voltage
[V]
4~6
DC
Current
[mA]
≤
45
Connector
N
(Female)
Frequency
Range(MHz)
1575.42±5
Gain(dB)
34±2
Flatness
in
bandwidth(dB)
＜
1
(1575.42±1.023MHz)
＜
2
(1575.42±5MHz)
Noise
Figure(dB)
≤
2.7
Out
‐
of
‐
Band
Rejection(dBc)
12
(1575±30MHz)
35
(1575±50MHz)
70
(1575±100MHz)
VSWR
S11
≤
2.5dB(Input)
；
S22
≤
2.5dB(Output)
DC
Voltage(V)
4~6
DC
Current(mA)
≤
45
1dB
the
dot
of
the
output(dBm)
≥
0
Anti
‐
Surge
Performance
According
GB/T17626.5
‐
1999;
idt
IEC
61000
‐
4
‐
5:1995
standard
LNA
Specifications:
