FP1189
�½ - Watt HFET
Product Information
Reference Design: 2450 MHz
The application circuit is matched for output power.
Typical RF Performance, 25°C
Frequency
S21 – Gain
S11 – Input Return Loss
S22 – Output Return Loss
Output P1dB
Output IP3
(+12 dBm / tone, 1 MHz spacing)
S-Parameters
15
10
5
0
-5
-10
-15
-20
-25
-30
2200
2300
2400
2500
Frequency (MHz)
2600
2700
DB(|S[1,1]|)
DB(|S[2,1]|)
DB(|S[2,2]|)
MHz
dB
dB
dB
dBm
dBm
V
mA
2450
13.2
-36
-7.6
+27.5 +28.1
+38
+8
100
+40
+8
125
2450
Drain Voltage
Drain Current
The 2450 MHz Reference Circuit is shown for design purposes only. An
evaluation board is not readily available for this application. The reader can
obtain an FP1189-PCB2140S evaluation board and modify it with the circuit
shown to achieve the performance shown in this reference design. Only two
component changes are required (C4 and L3) from the FP1189-PCB2140S
evaluation board.
Vds = 8 V @ 125 mA
-Vgg
RES
ID=R1
R= 100 Ohm
CAP
ID=C3
C= 33 pF
CAP
ID=C8
C= 100000 pF
CAP
ID=C6
C= DNP pF
CAP
ID=C7
C= 22 pF
CAP
ID=C2
C= DNP pF
PORT
P= 1
Z= 50 Ohm
CAP
ID=C1
C= 22 pF
IND
ID=L1
L= 18 nH
TLINP
ID=TL1
Z0=50 Ohm
L=135 mil
Eeff=4.2
Loss=0
F0=0 MHz
RES
ID=R2
R= 10 Ohm
1
2
TLINP
ID=TL3
Z0=50 Ohm
L= 80 mil
Eeff=4.2
Loss=
0
F0=0 MHz
IND
ID=L3
L=1.8 nH
TLINP
ID=TL4
Z0=50 Ohm
L= 35 mil
Eeff=4.2
Loss=
0
F0=0 MHz
IND
ID=L2
L=18 nH
PORT
P= 2
Z= 50 Ohm
CAP
ID=C4
C= 1.2 pF
TLINP
I D =TL2
Z 0 = Ohm
50
L=45 mil
Eeff=4.2
Loss=
0
F 0 = MHz
0
CAP
ID=C5
C =0.5 pF
SUBCKT
ID=
Q1
NET=
"FP1189"
CAP
ID=
C7
C= 22 pF
The lengths shown in the microstrip lines are referenced from the component or pin edge-to-edge.
Bill of Materials
Ref. Desig.
C1, C7, C9
C3
C4
C5
C8
L1, L2
L3
R1
R2
Q1
C2, C4, C6, C11
Value
22 pF
33 pF
1.2 pF
0.5 pF
0.1
µF
18 nH
1.8 nH
100 O
10 O
FP1189
Part style
Chip capacitor
Chip capacitor
Chip capacitor
Chip capacitor
Chip capacitor
Multilayer chip inductor
Multilayer chip resistor
Chip resistor
Chip resistor
WJ 0.5W HFET
Do Not Place
Size
0603
0805
0603
0603
1206
0603
0603
0603
0603
SOT-89
C4
14 mil GETEK
TM
ML200DSS (e
r
= 4.2)
The main microstrip line has a line impedance of 50 O.
Specifications and information are subject to change without notice.
WJ Communications, Inc
•
Phone 1-800- WJ1-4401
•
FAX: 408-577-6621
•
e- mail: sales@wj.com
•
Web site: www.wj.com
September 2004
WJCI [ WJ COMMUNICATION. INC. ]
