11

Freq

F

min

Γ

opt

Γ

opt

R

n

G

a

GHz

dB

Mag.

Ang.

dB

0.5

0.60

0.19

162.00

3.0

20.0

1.0

0.72

0.30

164.00

2.6

18.3

2.0

0.81

0.44

176.97

2.0

15.9

3.0

0.92

0.56

‑164.98

2.0

13.6

4.0

1.24

0.59

‑155.51

3.4

11.1

5.0

1.50

0.70

‑136.55

11.1

9.7

6.0

1.60

0.75

‑128.59

16.0

8.7

7.0

1.88

0.81

‑117.31

24.0

7.6

8.0

2.02

0.68

‑109.54

28.8

5.6

Typical Noise Parameters, V

Frequency at 4.5V, 120 mA.

MAG

FREQUENCY (GHz)

0

20

10

5

15

40.0

30.0

20.0

10.0

0.0

-10.0

-20.0

MSG

ATF-521P8 Typical Scattering Parameters, V

Freq.

S

11

S

21

S

12

S

GHz

Mag.

Ang.

dB

Mag.

Ang.

dB

Mag.

Ang.

Mag.

Ang.

dB

0.1

0.913

‑84.6

34.2

51.26

135.4

‑36.4

0.015

49.0

0.423

‑106.6

35.3

0.2

0.900

‑125.0

30.3

32.80

115.4

‑33.9

0.020

31.2

0.499

‑139.4

32.1

0.3

0.896

‑142.0

27.4

23.39

106.1

‑33.4

0.021

25.3

0.522

‑153.4

30.5

0.4

0.893

‑152.3

25.1

17.89

100.3

‑32.9

0.023

23.5

0.530

‑161.1

28.9

0.5

0.882

‑158.4

23.4

14.75

96.3

‑32.6

0.023

22.5

0.531

‑165.0

28.1

0.6

0.895

‑164.2

21.8

12.36

92.9

‑32.7

0.023

20.6

0.537

‑168.4

27.3

0.7

0.893

‑167.8

20.6

10.71

90.5

‑32.4

0.024

20.4

0.537

‑171.2

26.5

0.8

0.895

‑170.8

19.5

9.39

88.0

‑32.3

0.024

21.1

0.539

‑173.1

25.9

0.9

0.897

‑173.0

18.5

8.44

86.1

‑32.2

0.025

22.1

0.539

‑174.8

25.3

1

0.895

‑175.5

17.6

7.59

83.6

‑31.8

0.026

23.0

0.540

‑176.9

24.7

1.5

0.893

176.0

14.1

5.07

75.3

‑31.1

0.028

25.5

0.538

177.4

22.6

2

0.889

169.2

11.8

3.89

67.8

‑30.0

0.032

27.9

0.528

172.2

20.8

2.5

0.882

163.6

10.0

3.15

61.2

‑29.0

0.036

30.2

0.526

168.1

19.4

3

0.888

157.9

8.4

2.62

54.6

‑28.2

0.039

30.2

0.528

163.9

16.9

4

0.883

146.8

5.9

1.97

40.7

‑26.5

0.047

29.7

0.536

155.7

13.6

5

0.885

137.7

3.8

1.55

28.2

‑25.2

0.055

26.3

0.556

148.1

11.6

6

0.892

128.0

2.1

1.28

16.7

‑24.0

0.063

21.9

0.576

140.5

10.2

7

0.894

120.4

0.6

1.08

5.1

‑22.8

0.072

18.2

0.591

133.1

8.9

8

0.880

105.7

‑1.0

0.89

‑8.7

‑21.2

0.087

10.6

0.585

124.3

6.6

9

0.876

96.5

‑1.9

0.81

‑20.8

‑20.1

0.099

3.2

0.602

114.9

5.7

10

0.879

84.4

‑3.0

0.71

‑32.7

‑19.3

0.108

‑5.2

0.605

104.5

4.7

11

0.889

72.8

‑3.8

0.65

‑44.3

‑18.6

0.118

‑13.5

0.624

94.2

4.3

12

0.881

62.4

‑5.2

0.55

‑56.0

‑18.1

0.125

‑23.1

0.642

83.4

2.7

13

0.893

54.0

‑6.3

0.48

‑66.6

‑17.7

0.130

‑31.4

0.664

72.4

2.2

14

0.891

42.1

‑7.2

0.44

‑72.6

‑17.3

0.136

‑38.4

0.697

65.1

1.2

15

0.888

34.1

‑8.3

0.39

‑79.2

‑16.8

0.144

‑45.9

0.732

56.7

0.4

16

0.845

25.3

‑9.1

0.35

‑89.6

‑16.1

0.157

‑55.0

0.751

50.4

‑1.5

17

0.828

13.2

‑11.2 0.28

‑95.9

‑15.6

0.167

‑64.2

0.821

44.0

‑3.9

18

0.827

‑10.2

‑11.0 0.28

‑92.5

‑16.6

0.147

‑86.1

0.654

39.9

‑4.3

Notes:

1. F

a set of 16 noise figure measurements made at 16 different impedances using an ATN NP5 test system. From these measurements a true F

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.