Transmit Combiners - Aspen Electronics

Reference
Power Conversion Chart & Free Space Path Lost
Power Conversion Chart dBm to
dBw to Watts to Volts
dBm dBw Watts Volts (50 Ohm)
80 50 100 kW 2236
75 45 31.6 kW 1257
70 40 10.0 kW 707
65 35 3.16 kW 398
60 30 1000 224
55 25 316 126
50 20 100 70.7
45 15 31.6 39.8
40 10 10.0 22.4
38 8 6.31 17.8
36 6 3.98 14.1
34 4 2.51 11.2
32 2 1.58 8.90
30 0 1.00 7.07
29 -1 0.79 6.30
28 -2 0.63 5.62
27 -3 0.50 5.01
26 -4 0.40 4.46
25 -5 0.32 3.98
24 -6 0.25 3.54
23 -7 0.20 3.16
22 -8 0.16 2.82
21 -9 0.13 2.51
20 -10 0.10 2.24
19 -11 79 mW 1.99
Power Conversion Chart dBm to
dBw to Watts to Volts
dBm dBm Watts Volts (50 Ohm)
18 -12 63 mW 1.78
17 -13 50 mW 1.58
16 -14 40 mW 1.41
15 -15 32 mW 1.26
14 -16 25 mW 1.12
13 -17 20 mW 1.00
12 -18 16 mW 0.890
11 -19 13 mW 0.793
10 -20 10 mW 0.707
9 -21 7.9 mW 0.630
8 -22 6.3 mW 0.562
7 -23 5.0 mW 0.501
6 -24 4.0 mW 0.446
5 -25 3.2 mW 0.398
4 -26 2.5 mW 0.354
3 -27 2.0 mW 0.316
2 -28 1.6 mW 0.282
1 -29 1.3 mW 0.251
0 -30 1.0 mW 0.224
-5 -35 316 uW 0.126
-10 -40 100 uW 0.071
-15 -45 31.6 uW 0.040
-20 -50 10 uW 0.022
-25 -55 3.16 uW 0.013
-30 -60 1 uW 0.007
Free Space Path Loss Estimator
Path
Length
Path Loss in dB: Frequency in Mhz
(miles)
50 150 170 450 500 800 900
0.1 50.58 60.12 61.21 69.66 70.58 74.66 75.68
0.25 58.54 68.08 69.17 77.62 78.54 82.62 83.64
0.5 64.56 74.10 75.19 83.64 84.56 88.64 89.66
1 70.58 80.12 81.21 89.66 90.58 94.66 95.68
2 76.60 86.14 87.23 95.68 96.60 100.68 101.71
3 80.12 89.66 90.75 99.21 100.12 104.20 105.23
4 82.62 92.16 93.25 101.71 102.62 106.70 107.73
5 84.56 94.10 95.19 103.64 104.56 108.64 109.66
6 86.14 95.68 96.77 105.23 106.14 110.22 111.25
7 87.48 97.02 98.11 106.57 107.48 111.56 112.59
8 88.64 98.18 99.27 107.73 108.64 112.72 113.75
9 89.66 99.21 100.29 108.75 109.66 113.75 114.77
10 90.58 100.12 101.21 109.66 110.58 114.66 115.68
12 92.16 101.71 102.79 111.25 112.16 116.25 117.27
14 93.50 103.04 104.13 112.59 113.50 117.58 118.61
16 94.66 104.20 105.29 113.75 114.66 118.74 119.77
18 95.68 105.23 106.31 114.77 115.68 119.77 120.79
20 96.60 106.14 107.23 115.68 116.60 120.68 121.71
30 100.12 109.66 110.75 119.21 120.12 124.20 125.23
40 102.62 112.16 113.25 121.71 122.62 126.70 127.73
50 104.56 114.10 115.19 123.64 124.56 128.64 129.66
FORMULA: Path Loss (dB) = 36.6 + 20 log (MHz) + 20 log (miles)
tel: 866.695.4569 fax: 716.549.4772 e: sales@bird-technologies.com
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