dBm與功率、dBm與電壓關系對照表

,dBm=10*log10(mW),,,,,,,

,W=Vrms2/R,,,,,,,

,Vpp=2*sqrt(2)*Vrms,,,,,,,

,R(?):,50,,,,,,

,dBm,mW,Vrms,Vpp,dBm,mW,Vrms,Vpp

,30,1000.000,7.071,20.000,29.5,891.251,6.676,18.881

,29,794.328,6.302,17.825,28.5,707.946,5.950,16.828

,28,630.957,5.617,15.887,27.5,562.341,5.303,14.998

,27,501.187,5.006,14.159,26.5,446.684,4.726,13.367

,26,398.107,4.462,12.619,25.5,354.813,4.212,11.913

,25,316.228,3.976,11.247,24.5,281.838,3.754,10.618

,24,251.189,3.544,10.024,23.5,223.872,3.346,9.463

,23,199.526,3.159,8.934,22.5,177.828,2.982,8.434

,22,158.489,2.815,7.962,21.5,141.254,2.658,7.517

,21,125.893,2.509,7.096,20.5,112.202,2.369,6.699

,20,100.000,2.236,6.325,19.5,89.125,2.111,5.971

,19,79.433,1.993,5.637,18.5,70.795,1.881,5.321

,18,63.096,1.776,5.024,17.5,56.234,1.677,4.743

,17,50.119,1.583,4.477,16.5,44.668,1.494,4.227

,16,39.811,1.411,3.991,15.5,35.481,1.332,3.767

,15,31.623,1.257,3.557,14.5,28.184,1.187,3.358

,14,25.119,1.121,3.170,13.5,22.387,1.058,2.992

,13,19.953,0.999,2.825,12.5,17.783,0.943,2.667

,12,15.849,0.890,2.518,11.5,14.125,0.840,2.377

,11,12.589,0.793,2.244,10.5,11.220,0.749,2.119

,10,10.000,0.707,2.000,9.5,8.913,0.668,1.888

,9,7.943,0.630,1.783,8.5,7.079,0.595,1.683

,8,6.310,0.562,1.589,7.5,5.623,0.530,1.500

,7,5.012,0.501,1.416,6.5,4.467,0.473,1.337

,6,3.981,0.446,1.262,5.5,3.548,0.421,1.191

,5,3.162,0.398,1.125,4.5,2.818,0.375,1.062

,4,2.512,0.354,1.002,3.5,2.239,0.335,0.946

,3,1.995,0.316,0.893,2.5,1.778,0.298,0.843

,2,1.585,0.282,0.796,1.5,1.413,0.266,0.752

,1,1.259,0.251,0.710,0.5,1.122,0.237,0.670

,0,1.000,0.224,0.632,0.0,1.000,0.224,0.632

,-1,0.794,0.199,0.564,-0.5,0.891,0.211,0.597

,-2,0.631,0.178,0.502,-1.5,0.708,0.188,0.532

,-3,0.501,0.158,0.448,-2.5,0.562,0.168,0.474

,-4,0.398,0.141,0.399,-3.5,0.447,0.149,0.423

,-5,0.316,0.126,0.356,-4.5,0.355,0.133,0.377

,-6,0.251,0.112,0.317,-5.5,0.282,0.119,0.336

,-7,0.200,0.100,0.283,-6.5,0.224,0.106,0.299

,-8,0.158,0.089,0.252,-7.5,0.178,0.094,0.267

,-9,0.126,0.079,0.224,-8.5,0.141,0.084,0.238

,-10,0.100,0.071,0.200,-9.5,0.112,0.075,0.212

,-11,0.079,0.063,0.178,-10.5,0.089,0.067,0.189

,-12,0.063,0.056,0.159,-11.5,0.071,0.059,0.168

,-13,0.050,0.050,0.142,-12.5,0.056,0.053,0.150

,-14,0.040,0.045,0.126,-13.5,0.045,0.047,0.134

,-15,0.032,0.040,0.112,-14.5,0.035,0.042,0.119

,-16,0.025,0.035,0.100,-15.5,0.028,0.038,0.106

,-17,0.020,0.032,0.089,-16.5,0.022,0.033,0.095

,-18,0.016,0.028,0.080,-17.5,0.018,0.030,0.084

,-19,0.013,0.025,0.071,-18.5,0.014,0.027,0.075

,-20,0.010,0.022,0.063,-19.5,0.011,0.024,0.067

,-21,0.008,0.020,0.056,-20.5,0.009,0.021,0.060

,-22,0.006,0.018,0.050,-21.5,0.007,0.019,0.053

,-23,0.005,0.016,0.045,-22.5,0.006,0.017,0.047

,-24,0.004,0.014,0.040,-23.5,0.004,0.015,0.042

,-25,0.003,0.013,0.036,-24.5,0.004,0.013,0.038

,-26,0.003,0.011,0.032,-25.5,0.003,0.012,0.034

,-27,0.002,0.010,0.028,-26.5,0.002,0.011,