Specifications and information are subject to change without notice

TriQuint Semiconductor, Inc

• Phone 1-800-WJ1-4401 • FAX: 408-577-6633 • e-mail: info-sales@tqs.com • Web site: www. TriQuint.com

Page 3 of 4

April 2009

WJA1021

+5V Active-Bias InGaP HBT Gain Block

Application Circuit

C1

Blocking

Capacitor

RF OUT

L1

RF Choke

C3

Bypass

Capacitor

R4

0

Ω

RF IN

C2

Blocking

Capacitor

Vcc =+5.00V

Icc = 90 mA

WJA1021

For optimal OIP3 performance, the ground plane to the left and right side around the backside paddle of the WJA1021 should be removed as shown in the above PCB layout.

.

Recommended Component Values

(1)

Ref. Name

Value / Type

Size

L1

0805

C1, C2

1000 pF NPO chip capacitor

0603

C3

0.018

μF chip capacitor

0603

R4

0

0603

C4, C5, C6,

R3, R5, R6,

R7, R8

1.

The listed values are contained on the evaluation board to achieve optimal broadband performance

2.

For lower cost and performance (500 – 2000 MHz) option use 39 nH ceramic core wire wound inductor.

3.

Place holders for the 0

Ω resistors and “Do Not Place” references are not needed for final design.

Typical Device Data

Freq (GHz)

S11 (dB)

S11(ang)

S21 (dB)

S21 (ang)

S12(dB)

S12 (ang)

S22 (dB)

S22 (ang)

10

-15.27

-76.97

22.78

168.92

-25.80

14.54

-10.81

-41.48

50

-13.47

-152.73

20.29

167.37

-23.38

5.70

-17.02

-114.67

100

-13.32

-167.56

19.92

167.89

-23.14

2.35

-18.91

-138.72

200

-13.32

-176.11

19.69

162.64

-23.15

-0.19

-19.27

-150.77

400

-12.94

178.15

19.56

149.53

-23.10

-3.54

-19.05

-153.38

600

-12.38

175.26

19.41

135.79

-23.07

-6.98

-18.22

-155.49

800

-12.32

168.40

19.13

122.10

-23.01

-10.41

-16.64

-155.88

1000

-12.56

158.65

18.92

108.57

-22.96

-12.83

-14.40

-155.90

1200

-12.94

146.78

18.58

94.17

-23.04

-16.41

-12.71

-156.76

1400

-12.96

137.52

18.24

81.46

-22.89

-20.13

-11.63

-159.26

1590

-13.24

130.56

17.96

68.23

-22.87

-23.01

-11.35

-165.00

1600

-13.26

130.42

17.95

67.69

-22.87

-22.74

-11.36

-165.60

1800

-14.12

124.89

17.61

54.09

-22.79

-25.91

-11.04

-173.55

2000

-16.59

115.57

17.26

40.63

-22.96

-29.81

-10.18

178.28

2200

-21.32

95.97

16.79

27.03

-22.94

-33.39

-8.81

171.50

2400

-29.00

44.53

16.18

13.53

-23.04

-36.47

-7.80

167.47

2600

-31.47

-55.07

15.66

0.14

-23.06

-39.44

-7.42

162.95

2800

-22.56

-119.27

15.05

-13.34

-23.06

-42.87

-7.44

157.56

3000

-16.22

-137.02

14.35

-27.33

-23.15

-46.10

-7.52

149.16

3200

-12.35

-143.92

13.50

-40.56

-23.27

-49.30

-7.26

140.55

3400

-10.00

-148.38

12.51

-53.24

-23.47

-51.83

-6.61

132.18

3600

-8.71

-155.84

11.58

-65.24

-23.53

-54.62

-5.87

127.43

3800

-7.94

-168.09

10.79

-76.83

-23.40

-57.36

-5.50

124.79

4000

-7.03

175.94

9.72

-89.13

-23.29

-61.41

-5.62

120.23

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