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 August 2005 Rev 2

AH202

1W High Linearity Amplifier

Product Information

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

MHz

50

200 400 600 800

S21 – Gain

dB

18

17.9 17.5 17.0 16.3

S11 – Input Return Loss

dB

-13

-17

-15 -12.4 -10.3

S22 – Output Return Loss

dB

-13

-15

-17

-22

-28

Output P1dB

dBm

+30

Output IP3

(+10 dBm / tone, 10 MHz spacing)

dBm

+47

Supply Bias

dB

+11 V @ 330 mA

RES

ID=L2

R=0 Ohm

CAP

ID=C1

C=1000 pF

CAP

ID=C2

C=1000 pF

IND

ID=L1

L=470 nH

CAP

ID=C4 (0805)

C=1000 pF

CAP

ID=C5

C=1e5 pF

SUBCKT

ID=S1

NET="AH202_F"

PORT

P=1

Z=50 Ohm

PORT

P=2

Z=50 Ohm

+ 11V

0

0.2

0.4

0.6

0.8

1

Frequency (GHz)

Measured Performance

-30

-25

-20

-15

-10

-5

0

5

10

15

20

DB(|S[1,1]|)

DB(|S[2,1]|)

DB(|S[2,2]|)

Notes:

R=0

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_).