10

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.

ATF-331M4 Typical Scattering Parameters,

Freq.

MSG/MAG

GHz

Mag.

Ang.

dB

Mag.

Ang.

dB

Mag.

Ang.

Mag.

Ang.

dB

0.5

0.81

-93.00

23.11

14.30

127.30

-28.64

0.037

53.90

0.37

-161.30

25.87

0.8

0.78

-120.00

19.90

9.89

112.40

-26.56

0.047

48.30

0.43

-169.07

23.23

1.0

0.77

-133.00

19.03

8.94

105.60

-25.68

0.052

46.80

0.45

-173.33

22.35

1.5

0.75

-152.00

15.74

6.12

93.43

-23.88

0.064

45.83

0.48

178.37

19.81

1.8

0.74

-160.00

14.50

5.31

87.90

-22.85

0.072

45.73

0.48

174.33

18.68

2.0

0.74

-164.00

14.24

5.15

84.80

-22.27

0.077

45.83

0.49

171.87

18.25

2.5

0.72

-171.00

11.29

3.67

77.77

-20.82

0.091

45.73

0.49

165.90

16.06

3.0

0.69

-175.00

10.21

3.24

71.63

-19.25

0.109

45.27

0.51

162.80

14.73

4.0

0.71

163.00

7.64

2.41

52.93

-17.65

0.131

35.20

0.51

138.63

11.41

5.0

0.73

150.00

5.93

1.98

41.40

-17.08

0.140

30.07

0.51

135.70

9.89

6.0

0.71

141.00

4.81

1.74

28.60

-16.48

0.150

22.23

0.52

118.43

8.31

7.0

0.73

124.00

3.75

1.54

14.30

-15.65

0.165

11.90

0.53

111.93

7.56

8.0

0.74

113.00

3.52

1.50

6.20

-15.24

0.173

7.07

0.53

111.10

7.52

9.0

0.76

97.90

3.29

1.46

-5.37

-15.14

0.175

-1.87

0.54

95.43

7.31

10.0

0.79

83.70

2.67

1.36

-18.90

-14.89

0.180

-13.17

0.54

80.60

7.10

11.0

0.86

62.10

0.83

1.10

-33.30

-14.89

0.180

-25.67

0.54

67.90

6.92

12.0

0.87

62.30

0.00

1.00

-38.80

-14.42

0.190

-29.70

0.60

61.93

6.50

13.0

0.88

52.20

-0.82

0.91

-50.80

-14.89

0.180

-40.67

0.65

51.07

5.93

14.0

0.89

44.70

-1.41

0.85

-60.10

-15.39

0.170

-48.97

0.69

41.93

5.76

15.0

0.92

39.00

-3.22

0.69

-69.20

-15.65

0.165

-57.33

0.72

32.27

5.53

16.0

0.94

33.30

-4.88

0.57

-76.60

-18.42

0.120

-64.27

0.75

26.33

5.19

17.0

0.94

28.20

-5.04

0.56

-82.80

-17.59

0.132

-70.77

0.77

19.97

5.22

18.0

0.93

24.70

-6.02

0.50

-86.90

-17.72

0.130

-75.60

0.79

15.07

3.90

Freq

Γ

opt

Γ

opt

GHz

dB

Mag.

Ang.

dB

0.50

0.38

0.316

0.7

0.06

22.33

0.90

0.42

0.314

28.9

0.06

19.23

1.00

0.43

0.314

35.5

0.06

19.1

1.50

0.47

0.321

65.7

0.05

16.63

1.80

0.5

0.329

81.9

0.05

15.86

2.00

0.52

0.336

91.9

0.05

14.96

2.50

0.56

0.358

114.3

0.04

13.73

3.00

0.61

0.386

133.2

0.04

12.58

4.00

0.7

0.454

162.3

0.03

10.78

5.00

0.79

0.53

-178.1

0.03

9.3

6.00

0.88

0.606

-165.1

0.02

8.32

7.00

0.97

0.67

-155.8

0.04

7.44

8.00

1.06

0.714

-147.4

0.07

6.59

9.00

1.16

0.728

-137.1

0.11

6.36

10.00

1.25

0.703

-121.9

0.19

5.27

Typical Noise Parameters,

Frequency at 4 V , 60 mA.

MSG

MAG

FREQUENCY (GHz)

020

10

515

40

30

20

10

0

-10

2