7

Freq

Γ

opt

Γ

opt

GHz

dB

Mag.

Ang.

dB

0.50

0.37

0.377

0.7

0.07

21.42

0.90

0.41

0.367

24.5

0.06

18.53

1.00

0.42

0.366

31.1

0.06

18.28

1.50

0.46

0.365

61.6

0.05

15.95

1.80

0.49

0.37

77.8

0.05

15.42

2.00

0.51

0.374

87.9

0.05

14.61

2.50

0.55

0.392

110.5

0.04

13.33

3.00

0.59

0.416

129.6

0.04

12.25

4.00

0.68

0.479

159.2

0.03

10.5

5.00

0.77

0.553

179.4

0.02

9.06

6.00

0.86

0.627

-167.2

0.02

8.05

7.00

0.95

0.69

-157.6

0.04

7.13

8.00

1.04

0.733

-149.2

0.06

6.38

9.00

1.13

0.742

-139.1

0.1

5.97

10.00

1.22

0.709

-124.7

0.18

5

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 , 40 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

0.82

-90.50

22.45

13.27

128.40

-27.54

0.042

53.80

0.38

-155.50

24.99

0.8

0.78

-117.70

19.31

9.24

113.30

-25.35

0.054

47.10

0.44

-165.77

22.33

1.0

0.77

-130.90

18.50

8.41

106.40

-24.58

0.059

45.10

0.46

-170.63

21.54

1.5

0.75

-150.40

15.23

5.77

93.93

-22.97

0.071

43.03

0.49

180.17

19.10

1.8

0.74

-158.70

14.02

5.02

88.30

-21.94

0.080

42.33

0.49

-184.17

17.98

2.0

0.74

-162.70

13.79

4.89

85.10

-21.51

0.084

42.13

0.50

173.27

17.65

2.5

0.72

-170.00

10.81

3.47

77.97

-20.18

0.098

41.53

0.50

166.80

15.49

3.0

0.69

-174.10

9.60

3.02

71.63

-18.24

0.122

40.67

0.52

163.70

13.92

4.0

0.71

163.70

7.13

2.27

53.03

-17.33

0.136

30.70

0.52

139.43

11.20

5.0

0.73

150.50

5.46

1.87

41.40

-16.83

0.144

25.67

0.52

136.10

9.63

6.0

0.71

141.50

4.37

1.65

28.50

-16.31

0.153

18.13

0.54

118.23

8.02

7.0

0.73

124.40

3.34

1.47

14.10

-15.55

0.167

8.10

0.54

111.83

7.28

8.0

0.74

113.40

3.14

1.44

6.00

-15.19

0.174

3.57

0.54

110.90

7.28

9.0

0.76

98.20

2.94

1.40

-5.57

-15.14

0.175

-4.97

0.55

95.33

7.05

10.0

0.79

84.10

2.33

1.31

-19.10

-14.94

0.179

-16.07

0.55

80.50

6.83

11.0

0.86

62.40

0.44

1.05

-33.40

-14.94

0.179

-28.27

0.55

67.80

6.40

12.0

0.87

62.50

-0.38

0.96

-38.90

-14.47

0.189

-32.20

0.61

61.73

6.00

13.0

0.88

52.30

-1.20

0.87

-50.90

-14.99

0.178

-42.87

0.66

50.97

5.55

14.0

0.89

44.90

-1.79

0.81

-60.20

-15.55

0.167

-50.87

0.70

41.63

5.33

15.0

0.91

39.00

-3.64

0.66

-69.10

-15.81

0.162

-59.03

0.73

32.17

4.81

16.0

0.93

33.40

-5.30

0.54

-76.40

-18.64

0.117

-65.67

0.76

26.13

4.49

17.0

0.93

28.50

-5.40

0.54

-82.40

-17.79

0.129

-71.87

0.78

19.77

4.48

18.0

0.92

25.10

-6.34

0.48

-86.10

-17.92

0.127

-76.40

0.80

14.87

3.39