8

Freq

Γ

opt

Γ

opt

GHz

dB

Mag.

Ang.

dB

0.50

0.36

0.35

0.2

0.06

21.97

0.90

0.4

0.341

24.3

0.06

18.96

1.00

0.41

0.34

31.1

0.05

18.77

1.50

0.45

0.341

62.5

0.04

16.31

1.80

0.48

0.346

79.3

0.05

15.79

2.00

0.5

0.351

89.6

0.05

14.93

2.50

0.54

0.37

112.8

0.04

13.67

3.00

0.59

0.395

132.4

0.04

12.62

4.00

0.68

0.461

162.3

0.03

10.78

5.00

0.77

0.538

-177.6

0.02

9.28

6.00

0.86

0.616

-164.4

0.02

8.34

7.00

0.95

0.683

-155.3

0.04

7.37

8.00

1.04

0.729

-147.2

0.07

6.63

9.00

1.13

0.742

-137.3

0.11

6.19

10.00

1.22

0.712

-122.6

0.19

5.23

Notes:

1. The Fmin values are based on a set of 16 noise figure measurements made at 16 different impedances using an ATN NP5 test system. From these

measurements Fmin is calculated. Refer to the noise parameter measurement section for more information.

2. S and noise parameters are measured on a microstrip line made on 0.010 inch thick alumina carrier assembly. The input reference plane is at the end of

the gate pad. The output reference plane is at the end of the drain pad.

Typical Noise Parameters,

Frequency at 3 V , 60 mA.

MSG

MAG

FREQUENCY (GHz)

020

10

515

40

30

20

10

0

-10

2

ATF-331M4 Typical Scattering Parameters,

Freq.

MSG/MAG

GHz

Mag.

Ang.

dB

Mag.

Ang.

dB

Mag.

Ang.

Mag.

Ang.

dB

0.5

0.81

-93.60

22.93

14.01

127.00

-28.64

0.037

54.00

0.39

-167.20

25.78

0.8

0.78

-120.70

19.68

9.64

112.10

-26.56

0.047

48.30

0.46

-172.07

23.12

1.0

0.77

-133.60

18.81

8.72

105.40

-25.68

0.052

46.80

0.48

-175.73

22.24

1.5

0.75

-152.50

15.50

5.96

93.43

-23.88

0.064

46.03

0.51

176.57

19.69

1.8

0.74

-160.50

14.27

5.17

88.00

-22.73

0.073

45.93

0.51

172.73

18.50

2.0

0.74

-164.40

14.02

5.02

84.80

-22.16

0.078

46.03

0.52

170.47

18.09

2.5

0.72

-171.30

11.06

3.57

77.97

-20.72

0.092

45.93

0.52

164.60

15.89

3.0

0.70

-175.30

9.80

3.09

71.93

-18.40

0.120

45.37

0.53

161.90

14.10

4.0

0.71

162.70

7.39

2.34

53.33

-17.52

0.133

35.20

0.54

137.43

11.21

5.0

0.73

149.70

5.70

1.93

41.90

-16.95

0.142

29.87

0.54

134.20

9.70

6.0

0.71

140.60

4.61

1.70

29.10

-16.31

0.153

21.73

0.55

116.23

8.18

7.0

0.73

123.70

3.54

1.50

15.10

-15.55

0.167

11.40

0.56

110.13

7.39

8.0

0.74

112.70

3.33

1.47

7.10

-15.09

0.176

6.37

0.56

109.10

7.35

9.0

0.76

97.60

3.12

1.43

-4.37

-15.04

0.177

-2.77

0.57

93.43

7.16

10.0

0.79

83.40

2.52

1.34

-17.80

-14.75

0.183

-14.27

0.57

78.70

6.95

11.0

0.86

61.80

0.66

1.08

-32.10

-14.80

0.182

-26.87

0.57

66.20

6.68

12.0

0.87

62.00

-0.15

0.98

-37.60

-14.29

0.193

-31.00

0.63

60.03

6.21

13.0

0.88

52.00

-0.96

0.90

-49.50

-14.80

0.182

-41.97

0.68

49.47

5.74

14.0

0.89

44.50

-1.56

0.84

-58.70

-15.34

0.171

-50.27

0.71

40.23

5.55

15.0

0.92

38.80

-3.38

0.68

-67.60

-15.65

0.165

-58.43

0.74

30.87

5.16

16.0

0.94

33.20

-5.04

0.56

-74.90

-18.42

0.120

-65.47

0.77

25.03

4.92

17.0

0.94

28.20

-5.15

0.55

-80.90

-17.65

0.131

-71.67

0.78

18.87

4.96

18.0

0.93

24.60

-6.11

0.50

-84.90

-17.79

0.129

-76.30

0.80

14.17

3.76