11

ATF-55143 Typical Scattering Parameters, V

Freq.

S

11

S

21

S

12

S

22

MSG/MAG

GHz

Mag.

Ang.

dB

Mag.

Ang.

Mag.

Ang.

Mag.

Ang.

dB

0.1

0.997

-7.4

23.29

14.603

174.2

0.005

85.8

0.755

-4.4

34.65

0.5

0.947

-35.8

22.72

13.682

152

0.024

69.2

0.713

-21.1

27.56

0.9

0.860

-60.8

21.67

12.116

133

0.038

56.2

0.652

-34.6

25.04

1.0

0.840

-66.6

21.37

11.705

128.8

0.041

53.4

0.633

-37.3

24.56

1.5

0.739

-91.7

19.83

9.802

110.6

0.051

42.4

0.56

-48

22.84

1.9

0.672

-108.6

18.68

8.587

98.5

0.057

36

0.513

-54

21.78

2.0

0.658

-112.7

18.41

8.323

95.8

0.059

34.5

0.503

-55.3

21.49

2.5

0.597

-131.7

17.16

7.21

82.7

0.065

28.4

0.455

-60.9

20.45

3.0

0.554

-149.7

16.04

6.341

70.9

0.069

23

0.409

-65.7

19.63

4.0

0.515

175.4

14.17

5.114

49.1

0.078

13.3

0.328

-76.7

18.17

5.0

0.523

143.7

12.55

4.239

28.6

0.084

3.7

0.267

-90.7

17.03

6.0

0.538

118.2

11.06

3.572

9.6

0.09

-5

0.232

-104.8

14.23

7.0

0.559

96.4

9.78

3.084

-8.4

0.095

-14.7

0.201

-119.6

12.69

8.0

0.579

75.2

8.62

2.699

-25.9

0.098

-24.2

0.162

-127.4

11.32

9.0

0.615

56

7.65

2.413

-43.3

0.107

-31

0.113

-136.5

10.53

10.0

0.690

37.7

6.73

2.171

-62.1

0.117

-44

0.055

160.9

10.46

11.0

0.748

21.7

5.57

1.9

-80.3

0.122

-56.4

0.096

75.9

10.01

12.0

0.787

7.9

4.48

1.675

-97.3

0.126

-68.5

0.164

45.5

9.48

13.0

0.816

-7.3

3.5

1.496

-114.9

0.128

-81.4

0.210

23.7

9.02

14.0

0.841

-22.9

2.55

1.341

-133.5

0.13

-95.1

0.277

3

8.56

15.0

0.867

-37.3

1.15

1.142

-152.1

0.124

-109.2

0.386

-14.3

7.65

16.0

0.862

-50.5

-0.44

0.95

-169

0.118

-121.9

0.483

-26.3

5.86

17.0

0.877

-59.7

-1.83

0.81

176.3

0.116

-133.3

0.555

-39.5

5.25

18.0

0.921

-70

-2.99

0.709

160.6

0.111

-147.1

0.612

-53.9

6.59

Freq

F

min

Γ

opt

Γ

opt

R

n/50

G

a

GHz

dB

Mag.

Ang.

dB

0.5

0.20

0.65

17.6

0.1

25.79

0.9

0.25

0.55

23.6

0.1

23.9

1.0

0.26

0.53

28.3

0.1

23.45

1.9

0.39

0.49

49

0.09

19.94

2.0

0.4

0.48

51.5

0.09

19.6

2.4

0.47

0.38

62

0.08

18.34

3.0

0.56

0.32

79.6

0.07

16.71

3.9

0.69

0.19

120

0.06

14.8

5.0

0.85

0.18

-168.8

0.06

13.14

5.8

0.98

0.22

-135.4

0.08

12.3

6.0

1.01

0.22

-128.7

0.09

12.12

7.0

1.15

0.29

-94.6

0.15

11.38

8.0

1.32

0.35

-66.7

0.25

10.74

9.0

1.47

0.44

-45.7

0.38

10.04

10.0

1.58

0.54

-28.6

0.57

9.1

Notes:

1. F

min

values at 2 GHz and higher are based on measurements while the F

mins

below 2 GHz have been extrapolated. The F

min

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 a true F

min

is

calculated. Refer to the noise parameter application section for more information.

2. S and noise parameters are measured on a microstrip line made on 0.025 inch thick alumina carrier. The input reference plane is at the end of

the gate lead. The output reference plane is at the end of the drain lead. The parameters include the effect of four plated through via holes con-

necting source landing pads on top of the test carrier to the microstrip ground plane on the bottom side of the carrier. Two 0.020 inch diameter

via holes are placed within 0.010 inch from each source lead contact point, one via on each side of that point.

Typical Noise Parameters, V

Frequency at 2.7V, 20 mA.

MSG

2

FREQUENCY (GHz)

020

10

515

40

35

30

25

20

15

10

5

0

-5

MAG