Conversions Dbm Swr
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Charts and Conversion Tables Frequency Designation Chart Frequency, GHz
0.1
IEEE STD–521–1976 Frequency Designations
0.2
0.3
0.4
VHF
JCS Frequency Designations Wavelength (cm)
0.15
A
1.5
UHF
L
B
200 300
0.5 0.75 0.6 1
100 150
C
60 75
E
20 30
4
5
S
D
40 50
3
2
9-43
10
C
F
10 15
8
6
G
H
6 7.5
X
I
3.753 5
15
Ku
20
30
K
J
Ka
K
2 1.5
40
50
60
75
100
MILLIMETER
L
M
0.75 0.5 0.3 0.6 0.4
Charts and Conversion Tables, continued The Effect of VSWR on Transmitted Power VSWR
VSWR (dB)
Return Trans/ Volt. Power Power Loss Loss Refl. Trans Refl. (dB) (dB) Coeff. ( % ) (%)
VSWR
VSWR (dB)
Return Trans/ Volt. Power Power Loss Loss Refl. Trans Refl. (dB) (dB) Coeff. ( % ) (%)
1.00 1.01 1.02 1.03 1.04
.0 .1 .2 .3 .3
∞ 46.1 40.1 36.6 34.2
.000 .000 .000 .001 .002
.00 .00 .01 .01 .02
100.0 100.0 100.0 100.0 100.0
.0 .0 .0 .0 .0
1.64 1.66 1.68 1.70 1.72
4.3 4.4 4.5 4.6 4.7
12.3 12.1 11.9 11.7 11.5
.263 .276 .289 .302 .315
.24 .25 .25 .26 .26
94.1 93.8 93.6 93.3 93.0
5.9 6.2 6.4 6.7 7.0
1.05 1.06 1.07 1.08 1.09
.4 .5 .6 .7 .7
32.3 30.7 29.4 28.3 27.3
.003 .004 .005 .006 .008
.02 .03 .03 .04 .04
99.9 99.9 99.9 99.9 99.8
.1 .1 .1 .1 .2
1.74 1.76 1.78 1.80 1.82
4.8 4.9 5.0 5.1 5.2
11.4 11.2 11.0 10.9 10.7
.329 .342 .356 .370 .384
.27 .28 .28 .29 .29
92.7 92.4 92.1 91.8 91.5
7.3 7.6 7.9 8.2 8.5
1.10 1.11 1.12 1.13 1.14
.8 .9 1.0 1.1 1.1
26.4 25.7 24.9 24.3 23.7
.010 .012 .014 .016 .019
.05 .05 .06 .06 .07
99.8 99.7 99.7 99.6 99.6
.2 .3 .3 .4 .4
1.84 1.86 1.88 1.90 1.92
5.3 5.4 5.5 5.6 5.7
10.6 10.4 10.3 10.2 10.0
.398 .412 .426 .440 .454
.30 .30 .31 .31 .32
91.3 91.0 90.7 90.4 90.1
8.7 9.0 9.3 9.6 9.9
1.15 1.16 1.17 1.18 1.19
1.2 1.3 1.4 1.4 1.5
23.1 22.6 22.1 21.7 21.2
.021 .024 .027 .030 .033
.07 .07 .08 .08 .09
99.5 99.5 99.4 99.3 99.2
.5 .5 .6 .7 .8
1.94 1.96 1.98 2.00 2.50
5.8 5.8 5.9 6.0 8.0
9.9 9.8 9.7 9.5 7.4
.468 .483 .497 .512 .881
.32 .32 .33 .33 .43
89.8 89.5 89.2 88.9 81.6
10.2 10.5 10.8 11.1 18.4
1.20 1.21 1.22 1.23 1.24
1.6 1.7 1.7 1.8 1.9
20.8 20.4 20.1 19.7 19.4
.036 .039 .043 .046 .050
.09 .10 .10 .10 .11
99.2 99.1 99.0 98.9 98.9
.8 .9 1.0 1.1 1.1
3.00 3.50 4.00 4.50 5.00
9.5 10.9 12.0 13.1 14.0
6.0 5.1 4.4 3.9 3.5
1.249 1.603 1.938 2.255 2.553
.50 .56 .60 .64 .67
75.0 69.1 64.0 59.5 55.6
25.0 30.9 36.0 40.5 44.4
1.25 1.26 1.27 1.28 1.29
1.9 2.0 2.1 2.1 2.2
19.1 18.8 18.5 18.2 17.9
.054 .058 .062 .066 .070
.11 .12 .12 .12 .13
98.8 98.7 98.6 98.5 98.4
1.2 1.3 1.4 1.5 1.6
5.50 6.00 6.50 7.00 7.50
14.8 15.6 16.3 16.9 17.5
3.2 2.9 2.7 2.5 2.3
2.834 3.100 3.351 3.590 3.817
.69 .71 .73 .75 .76
52.1 49.0 46.2 43.7 41.5
47.9 51.0 53.8 56.2 58.5
1.30 1.32 1.34 1.36 1.38
2.3 2.4 2.5 2.7 2.8
17.7 17.2 16.8 16.3 15.9
.075 .083 .093 .102 .112
.13 .14 .15 .15 .16
98.3 98.1 97.9 97.7 97.5
1.7 1.9 2.1 2.3 2.5
8.00 8.50 9.00 9.50 10.00
18.1 18.6 19.1 19.6 20.0
2.2 2.1 1.9 1.8 1.7
4.033 4.240 4.437 4.626 4.807
.78 .79 .80 .81 .82
39.5 37.7 36.0 34.5 33.1
60.5 62.3 64.0 65.5 66.9
1.40 1.42 1.44 1.46 1.48
2.9 3.0 3.2 3.3 3.4
15.6 15.2 14.9 14.6 14.3
.122 .133 .144 .155 .166
.17 .17 .18 .19 .19
97.2 97.0 96.7 96.5 96.3
2.8 3.0 3.3 3.5 3.7
11.00 12.00 13.00 14.00 15.00
20.8 21.6 22.3 22.9 23.5
1.6 1.5 1.3 1.2 1.2
5.149 5.466 5.762 6.040 6.301
.83 .85 .86 .87 .88
30.6 28.4 26.5 24.9 23.4
69.4 71.6 73.5 75.1 76.6
1.50 1.52 1.54 1.56 1.58
3.5 3.6 3.8 3.9 4.0
14.0 13.7 13.4 13.2 13.0
.177 .189 .201 .213 .225
.20 .21 .21 .22 .22
96.0 95.7 95.5 95.2 94.9
4.0 4.3 4.5 4.8 5.1
16.00 17.00 18.00 19.00 20.00
24.1 24.6 25.1 25.6 26.0
1.1 1.0 1.0 .9 .9
6.547 6.780 7.002 7.212 7.413
.88 .89 .89 .90 .90
22.1 21.0 19.9 19.0 18.1
77.9 79.0 80.1 81.0 81.9
1.60 1.62
4.1 4.2
12.7 12.5
.238 .250
.23 .24
94.7 94.4
5.3 5.6
25.00 30.00
28.0 29.5
.7 .6
8.299 9.035
.92 .94
14.8 12.5
85.2 87.5
9-44
Charts and Conversion Tables, continued Decibels — Volts — Watts Conversion Table for a 50 ohm System dBm +53 +50 +49 +48 +47 +46 +45 +44 +43 +42 +41 +40 +39 +38 +37 +36 +35 +34 +33 +32 +31 +30 +29 +28 +27 +26 +25 +24 +23 +22 +21 +20 +19 +18 +17 +16 +15 +14 +13 +12 +11 +10 +9 +8 +7 +6 +5 +4 +3 +2 +1 0 –1 –2 –3 –4 –5 –6 –7 –8 –9 –10 –11 –12 –13 –14 –15 –16
V 100.0 70.7 64.0 58.0 50.0 44.5 40.0 32.5 32.0 28.0 26.2 22.5 20.0 18.0 16.0 14.1 12.5 11.5 10.0 9.0 8.0 7.10 6.40 5.80 5.00 4.45 4.00 3.55 3.20 2.80 2.52 2.25 2.00 1.80 1.60 1.41 1.25 1.15 1.00 .90 .80 .71 .64 .58 .500 .445 .400 .355 .320 .280 .252 .225 .200 .180 .160 .141 .125 .115 .100 .090 .080 .071 .064 .058 .050 .045 .040 .0355
P0 200 W 100 W 80 W 64 W 50 W 40 W 32 W 25 W 20 W 16 W 12.5 W 10 W 8W 6.4 W 5W 4W 3.2 W 2.50 W 2W 1.6 W 1.25 W 1.0 W 800 mW 640 mW 500 mW 400 mW 320 mW 250 mW 200 mW 160 mW 125 mW 100 mW 800 mW 64 mW 50 mW 40 mW 32 mW 25 mW 20 mW 16 mW 12.5 mW 10 mW 8 mW 6.4mW 5 mW 4 mW 3.2 mW 2.5 mW 2.0 mW 1.6 mW 1.25 mW 1.0 mW .80 mW .64 mW .50 mW .400 mW .32 mW .25 mW .20 mW .16 mW .125 mW .10 mW .07 mW .06 mW .05 mW .04 mW .03 mW .02 mW
dBm –17 –18 –19 –20 –21 –22 –23 –24 –25 –26 –27 –28 –29 –30 –31 –32 –33 –34 –35 –36 –37 –38 –39 –40 –41 –42 –43 –44 –45 –46 –47 –48 –49 –50 –51 –52 –53 –54 –55 –56 –57 –58 –59 –60 –61 –62 –63 –64
mV 31.5 28.5 25.1 22.5 20.0 17.9 15.9 14.1 12.8 11.5 10.0 8.9 8.0 7.1 6.25 5.8 5.0 4.5 4.0 3.5 3.2 2.85 2.5 2.25 2.0 1.8 1.6 1.4 1.25 1.18 1.00 0.90 0.80 0.71 0.64 0.57 0.50 0.45 0.40 0.351 0.32 0.28 0.251 0.225 0.20 0.18 0.16 0.141
P0 .02 mW .01 mW .01 mW .01 mW
.001 mW
.1 µW
.01 µW
dBm –65 –66 –67 –68 –69 –70 –71 –72 –73 –74 –75 –76 –77 –78 –79 –80 –81 –82 –83 –84 –85 –86 –87 –88 –89 –90 –91 –92 –93 –94 –95 –96 –97 –98 –99 –100 –101 –102 –103 –104 –105 –106
.001 µW
9-45
µV 128 115 100 90 80 71 65 58 50 45 40 35 32 29 25 22.5 20.0 18.0 16.0 11.1 12.9 11.5 10.0 9.0 8.0 7.1 6.1 5.75 5.0 4.5 4.0 3.51 3.2 2.9 2.51 2.25 2.0 1.8 1.6 1.41 1.27 1.18
P0
.1 nW
.01 nW
.001 nW
.1 pW
dBm –107 –108 –109 –110 –111 –112 –113 –114 –115 –116 –117 –118 –119 –120 –121 –122 –123 –124 –125 –126 –127 –128 –129 –130 –131 –132 –133 –134 –135 –136 –137 –138 –139 –140
nV 1000 900 800 710 640 580 500 450 400 355 825 285 251 225 200 180 160 141 128 117 100 90 80 71 61 58 50 45 40 35 33 29 25 23
P0
.01 pW
.001 pW
.1 fW
.01 fW
0.1
IEEE STD–521–1976 Frequency Designations
0.2
0.3
0.4
VHF
JCS Frequency Designations Wavelength (cm)
0.15
A
1.5
UHF
L
B
200 300
0.5 0.75 0.6 1
100 150
C
60 75
E
20 30
4
5
S
D
40 50
3
2
9-43
10
C
F
10 15
8
6
G
H
6 7.5
X
I
3.753 5
15
Ku
20
30
K
J
Ka
K
2 1.5
40
50
60
75
100
MILLIMETER
L
M
0.75 0.5 0.3 0.6 0.4
Charts and Conversion Tables, continued The Effect of VSWR on Transmitted Power VSWR
VSWR (dB)
Return Trans/ Volt. Power Power Loss Loss Refl. Trans Refl. (dB) (dB) Coeff. ( % ) (%)
VSWR
VSWR (dB)
Return Trans/ Volt. Power Power Loss Loss Refl. Trans Refl. (dB) (dB) Coeff. ( % ) (%)
1.00 1.01 1.02 1.03 1.04
.0 .1 .2 .3 .3
∞ 46.1 40.1 36.6 34.2
.000 .000 .000 .001 .002
.00 .00 .01 .01 .02
100.0 100.0 100.0 100.0 100.0
.0 .0 .0 .0 .0
1.64 1.66 1.68 1.70 1.72
4.3 4.4 4.5 4.6 4.7
12.3 12.1 11.9 11.7 11.5
.263 .276 .289 .302 .315
.24 .25 .25 .26 .26
94.1 93.8 93.6 93.3 93.0
5.9 6.2 6.4 6.7 7.0
1.05 1.06 1.07 1.08 1.09
.4 .5 .6 .7 .7
32.3 30.7 29.4 28.3 27.3
.003 .004 .005 .006 .008
.02 .03 .03 .04 .04
99.9 99.9 99.9 99.9 99.8
.1 .1 .1 .1 .2
1.74 1.76 1.78 1.80 1.82
4.8 4.9 5.0 5.1 5.2
11.4 11.2 11.0 10.9 10.7
.329 .342 .356 .370 .384
.27 .28 .28 .29 .29
92.7 92.4 92.1 91.8 91.5
7.3 7.6 7.9 8.2 8.5
1.10 1.11 1.12 1.13 1.14
.8 .9 1.0 1.1 1.1
26.4 25.7 24.9 24.3 23.7
.010 .012 .014 .016 .019
.05 .05 .06 .06 .07
99.8 99.7 99.7 99.6 99.6
.2 .3 .3 .4 .4
1.84 1.86 1.88 1.90 1.92
5.3 5.4 5.5 5.6 5.7
10.6 10.4 10.3 10.2 10.0
.398 .412 .426 .440 .454
.30 .30 .31 .31 .32
91.3 91.0 90.7 90.4 90.1
8.7 9.0 9.3 9.6 9.9
1.15 1.16 1.17 1.18 1.19
1.2 1.3 1.4 1.4 1.5
23.1 22.6 22.1 21.7 21.2
.021 .024 .027 .030 .033
.07 .07 .08 .08 .09
99.5 99.5 99.4 99.3 99.2
.5 .5 .6 .7 .8
1.94 1.96 1.98 2.00 2.50
5.8 5.8 5.9 6.0 8.0
9.9 9.8 9.7 9.5 7.4
.468 .483 .497 .512 .881
.32 .32 .33 .33 .43
89.8 89.5 89.2 88.9 81.6
10.2 10.5 10.8 11.1 18.4
1.20 1.21 1.22 1.23 1.24
1.6 1.7 1.7 1.8 1.9
20.8 20.4 20.1 19.7 19.4
.036 .039 .043 .046 .050
.09 .10 .10 .10 .11
99.2 99.1 99.0 98.9 98.9
.8 .9 1.0 1.1 1.1
3.00 3.50 4.00 4.50 5.00
9.5 10.9 12.0 13.1 14.0
6.0 5.1 4.4 3.9 3.5
1.249 1.603 1.938 2.255 2.553
.50 .56 .60 .64 .67
75.0 69.1 64.0 59.5 55.6
25.0 30.9 36.0 40.5 44.4
1.25 1.26 1.27 1.28 1.29
1.9 2.0 2.1 2.1 2.2
19.1 18.8 18.5 18.2 17.9
.054 .058 .062 .066 .070
.11 .12 .12 .12 .13
98.8 98.7 98.6 98.5 98.4
1.2 1.3 1.4 1.5 1.6
5.50 6.00 6.50 7.00 7.50
14.8 15.6 16.3 16.9 17.5
3.2 2.9 2.7 2.5 2.3
2.834 3.100 3.351 3.590 3.817
.69 .71 .73 .75 .76
52.1 49.0 46.2 43.7 41.5
47.9 51.0 53.8 56.2 58.5
1.30 1.32 1.34 1.36 1.38
2.3 2.4 2.5 2.7 2.8
17.7 17.2 16.8 16.3 15.9
.075 .083 .093 .102 .112
.13 .14 .15 .15 .16
98.3 98.1 97.9 97.7 97.5
1.7 1.9 2.1 2.3 2.5
8.00 8.50 9.00 9.50 10.00
18.1 18.6 19.1 19.6 20.0
2.2 2.1 1.9 1.8 1.7
4.033 4.240 4.437 4.626 4.807
.78 .79 .80 .81 .82
39.5 37.7 36.0 34.5 33.1
60.5 62.3 64.0 65.5 66.9
1.40 1.42 1.44 1.46 1.48
2.9 3.0 3.2 3.3 3.4
15.6 15.2 14.9 14.6 14.3
.122 .133 .144 .155 .166
.17 .17 .18 .19 .19
97.2 97.0 96.7 96.5 96.3
2.8 3.0 3.3 3.5 3.7
11.00 12.00 13.00 14.00 15.00
20.8 21.6 22.3 22.9 23.5
1.6 1.5 1.3 1.2 1.2
5.149 5.466 5.762 6.040 6.301
.83 .85 .86 .87 .88
30.6 28.4 26.5 24.9 23.4
69.4 71.6 73.5 75.1 76.6
1.50 1.52 1.54 1.56 1.58
3.5 3.6 3.8 3.9 4.0
14.0 13.7 13.4 13.2 13.0
.177 .189 .201 .213 .225
.20 .21 .21 .22 .22
96.0 95.7 95.5 95.2 94.9
4.0 4.3 4.5 4.8 5.1
16.00 17.00 18.00 19.00 20.00
24.1 24.6 25.1 25.6 26.0
1.1 1.0 1.0 .9 .9
6.547 6.780 7.002 7.212 7.413
.88 .89 .89 .90 .90
22.1 21.0 19.9 19.0 18.1
77.9 79.0 80.1 81.0 81.9
1.60 1.62
4.1 4.2
12.7 12.5
.238 .250
.23 .24
94.7 94.4
5.3 5.6
25.00 30.00
28.0 29.5
.7 .6
8.299 9.035
.92 .94
14.8 12.5
85.2 87.5
9-44
Charts and Conversion Tables, continued Decibels — Volts — Watts Conversion Table for a 50 ohm System dBm +53 +50 +49 +48 +47 +46 +45 +44 +43 +42 +41 +40 +39 +38 +37 +36 +35 +34 +33 +32 +31 +30 +29 +28 +27 +26 +25 +24 +23 +22 +21 +20 +19 +18 +17 +16 +15 +14 +13 +12 +11 +10 +9 +8 +7 +6 +5 +4 +3 +2 +1 0 –1 –2 –3 –4 –5 –6 –7 –8 –9 –10 –11 –12 –13 –14 –15 –16
V 100.0 70.7 64.0 58.0 50.0 44.5 40.0 32.5 32.0 28.0 26.2 22.5 20.0 18.0 16.0 14.1 12.5 11.5 10.0 9.0 8.0 7.10 6.40 5.80 5.00 4.45 4.00 3.55 3.20 2.80 2.52 2.25 2.00 1.80 1.60 1.41 1.25 1.15 1.00 .90 .80 .71 .64 .58 .500 .445 .400 .355 .320 .280 .252 .225 .200 .180 .160 .141 .125 .115 .100 .090 .080 .071 .064 .058 .050 .045 .040 .0355
P0 200 W 100 W 80 W 64 W 50 W 40 W 32 W 25 W 20 W 16 W 12.5 W 10 W 8W 6.4 W 5W 4W 3.2 W 2.50 W 2W 1.6 W 1.25 W 1.0 W 800 mW 640 mW 500 mW 400 mW 320 mW 250 mW 200 mW 160 mW 125 mW 100 mW 800 mW 64 mW 50 mW 40 mW 32 mW 25 mW 20 mW 16 mW 12.5 mW 10 mW 8 mW 6.4mW 5 mW 4 mW 3.2 mW 2.5 mW 2.0 mW 1.6 mW 1.25 mW 1.0 mW .80 mW .64 mW .50 mW .400 mW .32 mW .25 mW .20 mW .16 mW .125 mW .10 mW .07 mW .06 mW .05 mW .04 mW .03 mW .02 mW
dBm –17 –18 –19 –20 –21 –22 –23 –24 –25 –26 –27 –28 –29 –30 –31 –32 –33 –34 –35 –36 –37 –38 –39 –40 –41 –42 –43 –44 –45 –46 –47 –48 –49 –50 –51 –52 –53 –54 –55 –56 –57 –58 –59 –60 –61 –62 –63 –64
mV 31.5 28.5 25.1 22.5 20.0 17.9 15.9 14.1 12.8 11.5 10.0 8.9 8.0 7.1 6.25 5.8 5.0 4.5 4.0 3.5 3.2 2.85 2.5 2.25 2.0 1.8 1.6 1.4 1.25 1.18 1.00 0.90 0.80 0.71 0.64 0.57 0.50 0.45 0.40 0.351 0.32 0.28 0.251 0.225 0.20 0.18 0.16 0.141
P0 .02 mW .01 mW .01 mW .01 mW
.001 mW
.1 µW
.01 µW
dBm –65 –66 –67 –68 –69 –70 –71 –72 –73 –74 –75 –76 –77 –78 –79 –80 –81 –82 –83 –84 –85 –86 –87 –88 –89 –90 –91 –92 –93 –94 –95 –96 –97 –98 –99 –100 –101 –102 –103 –104 –105 –106
.001 µW
9-45
µV 128 115 100 90 80 71 65 58 50 45 40 35 32 29 25 22.5 20.0 18.0 16.0 11.1 12.9 11.5 10.0 9.0 8.0 7.1 6.1 5.75 5.0 4.5 4.0 3.51 3.2 2.9 2.51 2.25 2.0 1.8 1.6 1.41 1.27 1.18
P0
.1 nW
.01 nW
.001 nW
.1 pW
dBm –107 –108 –109 –110 –111 –112 –113 –114 –115 –116 –117 –118 –119 –120 –121 –122 –123 –124 –125 –126 –127 –128 –129 –130 –131 –132 –133 –134 –135 –136 –137 –138 –139 –140
nV 1000 900 800 710 640 580 500 450 400 355 825 285 251 225 200 180 160 141 128 117 100 90 80 71 61 58 50 45 40 35 33 29 25 23
P0
.01 pW
.001 pW
.1 fW
.01 fW
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