dB与倍数换算速查表.doc

dB 与倍数换算速查表计算公式： dB = 10log （ P1/P2）P1/P2：是功率的倍数示例： P1 为 2W，P2 为 1W10log （ 2W/1W ）=10 log（ 2）=3dB即 3dB 代表 2 倍此外，当有 dBm 减 dBm 时，得到的结果为 dB, 如：15dBm-9dBm=6dBdB 与倍数换算速查表（功率）dB倍数dB倍数dB倍数0116.14119.1823216.24219.2834.8316.34319.2846416.44419.3857516.54519.3867.8616.64619.4878.5716.74719.4889816.84819.5899.5916.94919.5901010175019.69110.41117.15119.69210.81217.25219.79311.11317.25319.79411.51417.35419.89511.81517.45519.896121617.55619.99712.31717.65719.99812.61817.658209912.81917.75920100132017.8602320013.22117.96124.830013.42217.9622640013.62318632750013.82418.16427.8600142518.16528.570014.12618.2662980014.32718.36729.590014.52818.36830100014.62918.46933200014.83018.57034.8300014.93118.57136400015.13218.67237500015.23318.67337.8600015.33418.77438.5700015.43518.87539800015.63618.87639.5900015.73718.977401000015.83818.9785010000015.939197916401980。