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

May 2004

AH118

¼ Watt, High Linearity InGaP HBT Amplifier

Product Information

The Communications Edge

TM

900 MHz Application Circuit (AH118-89PCB900)

Typical RF Performance at 25

°C

Frequency

900 MHz

S21 – Gain

20.4 dB

S11 – Input Return Loss

-15 dB

S22 – Output Return Loss

-12 dB

Output P1dB

+24.2 dB

Output IP3

(+17 dBm / tone, 1 MHz spacing)

+40 dB

Channel Power

(@-45 dBc ACPR, IS-95 9 channels fwd)

+18.2 dB

Noise Figure

4 dB

Device / Supply Voltage

+5 V

Quiescent Current

160 mA

CAP

C=

ID=

100 pF

C4

CAP

C=

ID=

100 pF

C5

CAP

C=

ID=

2 pF

C9

DIODE1

ID=D1

CAP

C=

ID=

56 pF

C3

CAP

C=

ID=

1000 pF

C2

CAP

C=

ID=

1e5 pF

C1

CAP

C=

ID=

8.2 pF

C7

IND

L=

ID=

33 nH

L1

RES

R=

ID=

0 Ohm

L2

IND

L=

ID=

2.7 nH

L3

SUBCKT

NET=

ID=

"AH118"

U1

PORT

Z=

P=

50 Ohm

1

PORT

Z=

P=

50 Ohm

2

Vcc = +5 V

5.6 V

C7 should be placed at the silk screen

marker 'C' on the WJ evaluation board.

All passive components are of size 0603 unless otherwise noted.

C9 should be placed between

on the WJ evaluation board.

size 1206

size 0805

The capacitor should be placed

19.5° @ 0.9GHz from pin 3

The capacitor should be placed

6.1° @ 0.9GHz from pin 1 of the AH118

silk screen markers '8' and '9'

size 0805

The diode D1 is used as over-voltage protection on the evaluation

boards. It is not specifically required in the final circuit layout in

a system using a DC regulator.

of the AH118.

L2 - the 0 ohm resistor - can be removed (with a thru line) in the

final circuit layout.

configuration.

Component R1 is shown in the silkscreen but is not used for this

Gain

17

18

19

20

21

22

800

850

900

950

1000

Frequency (MHz)

ReturnLoss

-25

-20

-15

-10

-5

0

800

850

900

950

1000

Frequency (MHz)

S11

S22

ACPRvs. Channel Power

IS-95, 9 Ch. Fwd, ±885 kHz offset, 30 kHz Meas BW, 900 MHz

-70

-60

-50

-40

12

13

14

15

16

17

18

19

Output Channel Power (dBm)