基础的东东，说不定什么时候用得着

dBm - volts - watts conversiondBm - volts - watts conversion
(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 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 Po 200W 100W 80W 64W 50W 40W 32W 25W 20W 16W 12.5W 10W 8W 6.4W 5W 4W 3.2W 2.5W 2W 1.6W 1.25W 1.0W 800 mW 640 mW 500 mW 400 mW 320 mW 250 mW 200 mW 160 mW 125 mW 100 mW 80 mW 64 mW 50 mW 40 mW 32 mW 25 mW 20 mW 16 mW 12.5 mW 10 mW 8 mW 6.4 mW 5 mW 4 mW 3.2 mW 2.5 mW 2.0 mW 1.6 mW 1.25 mW dBm 0 -1 -2 -3