BlueTexGPS Mobitex Integration guide v.2.6
17
ANTENNA PERFORMANCE
The internal antennas are pcb integrated monopoles and made in 1.0 mm thick FR4.
Input Impedance
1:Mkr (MHz) Ohm Ohm
2:Mkr (MHz)
1: 406.000 25.72 25.40
1> 406.0000 2.595
2> 430.000 38.23 -46.52
2: 430.0000 2.806
Stop 440.000 MHz
Start 400.000 MHz
Stop 440.000 MHz
Start 400.000 MHz
3
4
5
6
7
8
9
2:Reflection
SWR
1.0 /
Ref 1.000
C?
2
1
2
Meas2:Mkr1 406.000 MHz
2.595
1:Reflection
Smith
1 U FS
C?
3
4
5
6
7
8
9
-j250
-j100
-j50
-j25
-j10
j10
j25
j50
j100
j250
10 25 50 100 250
0
1
2
Meas1:Mkr2 430.000 MHz
38.23
-46.52
7.956pF
Fig:
Smith chart and VSWR, BlueTexGPS EU.
