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www.ASB.co.kr Mar.. 2004
1) S11 & S22 can be improved, at a specific frequency, by moving
an input shunt capacitor (C2) along an input transmission line.
2) OIP3 is measured with two tones at an output power of +14 dBm/tone
separated by 1 MHz.
-60
-40
-20
0
20
40
60
80
100
12
13
14
15
16
17
18
19
20
Frequency = 900MHz
Temperature (
oC )
ASG402
Application Circuit: 900 MHz
Typical Performance
S-parameters
Frequency
900 MHz
Magnitude S21
16 dB
Magnitude S11
1)
-15 dB
Magnitude S22
1)
-15 dB
Output P1dB
29 dBm
Output IP3
2)
45 dBm
Noise Figure
3.3 dB
Device Operating Voltage
6 V
Current
275 mA
Supply Voltage
8 V
Schematic
Gain vs. Temperature
600
700
800
900
1000
1100
1200
-25
-20
-15
-10
-5
0
+ 85
oC
+ 25
oC
- 40
oC
Frequency ( MHz )
600
700
800
900
1000
1100
1200
-40
-35
-30
-25
-20
-15
+ 85
oC
+ 25
oC
- 40
oC
Frequency ( MHz )
Board Layout (FR4, 40x40 mm
2, 0.8T)
C2= 8 pF
C1=10 pF
R2=1.2 k
Ω
L2=10 nH
C4=4.7 pF
Vs= 8V
RF IN
RF OUT
ASG402
C6=
100 pF
C7=
1000 pF
C8=
1
µF
50
Ω
4.5 mm
50
Ω
9 mm
L1=470 nH
C5=1
µF
L3=33 nH
C3=100 pF
R1=7.5
Ω
R3=300
Ω
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