AH202
1W High Linearity Amplifier
Reference Design: 50-800 MHz
The AH202 is suitable for applications between 50 – 800 MHz without any requirements for input or output matching. Only
bypass and blocking capacitors and an RF bias choke are needed for operation. A user can simply request an AH202-PCB900
Evaluation Board and replace components C1, C2, C3, C6, L1, and L2 to the values shown below to evaluate the device.
Frequency
S21 – Gain
S11 – Input Return Loss
S22 – Output Return Loss
Output P1dB
Output IP3
(+10 dBm / tone, 10 MHz spacing)
MHz
dB
dB
dB
dBm
dBm
dB
50
18
-13
-13
200
17.9
-17
-15
400 600 800
17.5 17.0 16.3
-15 -12.4 -10.3
-17 -22 -28
+30
+47
Supply Bias
+11 V @ 330 mA
+ 11V
CAP
ID=C5
C=1e5 pF
CAP
ID=C4 (0805)
C=1000 pF
PORT
P=1
Z=50 Ohm
CAP
ID=C1
C=1000 pF
RES
ID=L2
R=0 Ohm
IND
ID=L1
L=470 nH
PORT
P=2
Z=50 Ohm
SUBCKT
ID=S1
NET="AH202_F"
CAP
ID=C2
C=1000 pF
Measured Performance
20
15
10
Magnitude (dB)
5
0
-5
-10
-15
-20
-25
-30
0
0.2
0.4
0.6
Frequency (GHz)
0.8
1
DB(|S[1,1]|)
DB(|S[2,1]|)
DB(|S[2,2]|)
Notes:
•
•
•
•
5
removed from the circuit without any effect to the performance.
The microstrip line is weakly co-planar. Ground planes around it are not necessary for operation
of the AH202.
Adequate heat sinking is required for the device. Further mounting instructions are shown in the
AH202 datasheet.
The RF choke should be a wirewound ceramic type to insure sufficient current carrying capacity.
Coilcraft’s 1008 CS series is recommended (part #1008CS-471X_B_).
DW GHVLJQDWRU /
LV XVHG DV D SODFH KROGHU IRU D GLIIHUHQW DSSOLFDWLRQ FLUFXLW ,W FDQ EH
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
Page 3 of 9 May 2007
WJCI [ WJ COMMUNICATION. INC. ]
