功 率                                  dBm                电压（有效值）        电压（峰峰值）

1000000W=1MW                  90                      7.07 KV                      20 KV

100000W=100KW                80                      2.236 KV                    6.325 KV

10000W=10KW                    70                      0.707 KV                    2 KV

1000W=1KW                        60                      223.6 V                      632.5 V

100W                                     50                       70.7 V                       200 V

10W                                      40                       22.36 V                      63.25 V

1W                                        30                         7.07 V                       20 V

100mW=10-1W                    20                        2.236 V                    6.325 V

10MW=10-2W                     10                        0.707 V                    2 V

1mW=10-3W                         0                        223.6 mV                  632.46 mV

100μW=10-4W                   -10                        70.7 mV                  200 mV

10μW=10-5W                     -20                       22.36 mV                63.25 mV

1μW=10-6W                       -30                        7.07 mV                 20 mV

100nW=10-7W                    -40                      2.236 mV                6.325 mV

10nW=10-8W                      -50                      0.707 mV                 2 mV