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

FP1189

½ - Watt HFET

Product Information

Reference Design: 2450 MHz

The application circuit is matched for output power.

Typical RF Performance, 25

°C

Frequency

MHz

2450

2450

S21 – Gain

dB

13.2

S11 – Input Return Loss

dB

-36

S22 – Output Return Loss

dB

-7.6

Output P1dB

dBm

+27.5

+28.1

Output IP3

(+12 dBm / tone, 1 MHz spacing)

dBm

+38

+40

Drain Voltage

V

+8

+8

Drain Current

mA

100

125

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.

2200

2300

2400

2500

2600

2700

Frequency (MHz)

S-Parameters

-30

-25

-20

-15

-10

-5

0

5

10

15

DB(|S[1,1]|)

DB(|S[2,1]|)

DB(|S[2,2]|)

CAP

C=

ID=

22 pF

C1

CAP

C=

ID=

1.2 pF

C4

CAP

C=

ID=

33 pF

C3

CAP

C=

ID=

0.5 pF

C5

CAP

C=

ID=

22 pF

C7

CAP

C=

ID=

100000 pF

C8

CAP

C=

ID=

22 pF

C7

IND

L=

ID=

18 nH

L1

IND

L=

ID=

18 nH

L2

IND

L=

ID=

1.8 nH

L3

RES

R=

ID=

100 Ohm

R1

RES

R=

ID=

10 Ohm

R2

TLINP

F0=

Loss=

Eeff=

L=

Z0=

ID=

0 MHz

0

4.2

135 mil

50 Ohm

TL1

TLINP

F0=

Loss=

Eeff=

L=

Z0=

ID=

0 MHz

0

4.2

45 mil

50 Ohm

TL2

TLINP

F0=

Loss=

Eeff=

L=

Z0=

ID=

0 MHz

0

4.2

80 mil

50 Ohm

TL3

TLINP

F0=

Loss=

Eeff=

L=

Z0=

ID=

0 MHz

0

4.2

35 mil

50 Ohm

TL4

CAP

C=

ID=

DNP pF

C2

CAP

C=

ID=

DNP pF

C6

1

2

SUBCKT

NET=

ID=

"FP1189"

Q1

PORT

Z=

P=

50 Ohm

1

PORT

Z=

P=

50 Ohm

2

Vds = 8 V @ 125 mA

-Vgg

The lengths shown in the microstrip lines are referenced from the component or pin edge-to-edge.

14 mil GETEK

The main microstrip line has a line impedance of 50 O.

Bill of Materials

Ref. Desig.

Value

Part style

Size

C1, C7, C9

22 pF

Chip capacitor

0603

C3

33 pF

Chip capacitor

0805

C4

1.2 pF

Chip capacitor

0603

C5

0.5 pF

Chip capacitor

0603

C8

0.1

µF

Chip capacitor

1206

L1, L2

18 nH

Multilayer chip inductor

0603

L3

1.8 nH

Multilayer chip resistor

0603

R1

100 O

Chip resistor

0603

R2

10 O

Chip resistor

0603

Q1

FP1189

WJ 0.5W HFET

SOT-89

C2, C4, C6, C11

Do Not Place

C4