RF ATT  Design

Attenuators ( ; 50)

 

ATT

R1(RX)

R2(RS)

R3(RX)

0 dB

0

1 dB

750

5.1

750

2 dB

470

12

470

3 dB

270

18

270

4 dB

220

24

220

5 dB

180

30

180

6 dB

150

36

150

7 dB

130

47

130

8 dB

120

51

120

9 dB

110

62

110

10 dB

96.2

71.1

96.2

10 dB

92

75

92

10 dB

91

68

91

11 dB

92

82

92

12 dB

82

92

82

13 dB

82

110

82

14 dB

72(75)

120

72(75)

15 dB

72(75)

136(130)

72(75)

16 dB

69

154

69

17 dB

69

173

69

20 dB

61.1

247.5

61.1

20 dB

62

250
(120+130)

62

30 dB

53

790

53

40 dB

51

2.5 k

51

50 dB

50.3

7.905 k

50.3

 

 

 

 

 

T Attenuators ( ; 50)

ATT

R1

R2

R3

Total
dissipation
(mW)

Resistance

dissipation
(mW)

Resistance

dissipation
(mW)

Resistance

dissipation
(mW)

1 dB

2.875

57

433.3

102

2.875

46

205

2 dB

5.731

114

215.2

180

5.731

72

360

3 dB

8.55

171

141.9

242

8.55

87

446

4 dB

11.31

226

104.8

285

11.31

90

520

5 dB

14.01

280

82.24

314

14.01

88

682

6 dB

16.61

332

66.93

332

16.61

83

747

7 dB

19.12

387

55.80

341

19.12

76

804

8 dB

21.53

430

47.31

343

21.53

68

841

9 dB

23.8

 

40.59

 

23.8

 

 

10 dB

25.97

519

35.14

328

25.97

52

699

11 dB

28.01

 

30.61

 

28.01

 

 

12 dB

29.92

598

26.81

300

29.92

38

936

13 dB

31.708

 

23.56

 

31.708

 

 

14 dB

33.36

 

20.78

 

33.36

 

 

15 dB

34.9

710

18.36

235

34.9

21

966

16 dB

36.319

 

16.25

 

36.319

 

 

17 dB

37.623

 

14.41

 

37.623

 

 

20 dB

40.91

818

10.10

168

40.91

10

996

25 dB

44.67

894

5.641

98

44.67

5

997

30 dB

46.9

938

3.165

59

46.9

1

998

35 dB

48.25

970

1.779

29

48.25

<1

999

40 dB

49.01

980

1.000

20

49.01

<1

1,000

50 dB

49.68

 

0.316

 

49.68

 

 

 Dissipations based on 1W input with a 50 temination.

 

Pi & Tee Network Resistive Attenuation Calculator

http://my.athenet.net/~multiplx/cgi-bin/att_pad.main.cgi