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

ECG015

¼ Watt, High Linearity InGaP HBT Amplifier

Product Information

The Communications Edge

TM

Typical Device Data

1.8

1.9

2

2.1

2.2

2.3

2.4

2.5

Frequency (GHz)

Gain / Maximum Stable Gain

10

15

20

25

30

DB(|S[2,1]|)

DB(GMax)

10.0

5.

0

3.

0

4.

0

-0

.2

-

0

.

4

S11

Swp Max

2.50123GHz

Swp Min

1.79083GHz

10.0

5.

0

3.

0

4.

0

-0

.2

-

0

.

4

S22

Swp Max

2.50123GHz

Swp Min

1.79083GHz

Notes:

The gain for the unmatched device in 50 ohm system is shown as the trace in blue color. For a tuned circuit for a particular frequency, it is expected that

actual gain will be higher, up to the maximum stable gain. The maximum stable gain is shown in the dashed red line.

The impedance plots are shown from 1800 – 2500 MHz, with markers placed at 1.8 – 2.5 GHz in 0.1 GHz increments.

Freq (MHz)

S11 (dB)

S11 (ang)

S21 (dB)

S21 (ang)

S12 (dB)

S12 (ang)

S22 (dB)

S22 (ang)

1800

-6.70

80.76

15.90

24.47

-28.55

-25.74

-5.34

156.39

1900

-7.55

68.30

15.77

16.51

-28.96

-32.29

-4.96

156.21

2000

-8.60

53.47

15.66

7.76

-30.14

-38.84

-4.56

155.58

2100

-9.85

35.06

15.53

-1.19

-31.49

-45.79

-4.12

155.07

2200

-11.07

10.07

15.40

-10.90

-33.04

-59.63

-3.67

153.49

2300

-11.69

-21.71

15.08

-20.90

-36.28

-78.21

-3.20

150.85

2400

-10.87

-56.13

14.67

-31.83

-40.69

-106.46

-2.80

147.22

2500

-9.15

-86.03

14.14

-43.53

-42.21

163.73

-2.44

142.35

Device S-parameters are available for download off of the website at: http://www.wj.com

Application Circuit PC Board Layout

Circuit Board Material: .014” Getek, 4 - layer, 1 oz copper, Microstrip line details: width = .026”, spacing = .026”

The silk screen markers ‘A’, ‘B’, ‘C’, etc. and ‘1’, ‘2’, ‘3’, etc. are used as placemarkers for the input and output tuning shunt

capacitors. The markers and vias are spaced in .050” increments.