常用公式参数表

◇50欧姆系统下的电平转换表 From-To dBm dBV dBmV dBuV dBm 0 +13 -47 -107 dBV -13 0 -60 -120 dBmV +47 +60 0 -60 dBuV -107 +1编辑器数学公式物理公式标准体重计算公式魔方公式图解等比数列求和公式圆的面积公式三角函数公式大全三角函数公式
常用公式参数表
◇反射系数、回波损耗和驻波比表 反射系数P 回波损耗RL 驻波比SWR 1.00 0.00 ∞ 0.90 0.92 19.00 0.80 1.94 9.00 0.70 3.10 5.67 0.60 4.44 4.00 0.50 6.02 3.00 0.40 7.96 2.33 0.30 10.46 1.86 0.20 13.98 1.50 0.10 20.00 1.22 0.09 20.92 1.20 0.08 21.94 1.17 0.07 23.10 1.15 0.06 24.44 1.13 0.05 26.02 1.11 0.04 27.96 1.08 0.03 30.46 1.06 0.02 33.98 1.04 0.01 40.00 1.02 0.00 ∞ 1.00 ◇常用衰减器电阻对照表 R0=50Ω dBm -20 -19 -18 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = ◇dB毫瓦--功率对照表 m w dBm .010 +21 .012 +22 .016 +23 .020 +24 .025 +25 .032 +26 .040 +27 .050 +28 .063 +29 .079 +30 .100 +31 .130 +32 .160 +33 .200 +34 .250 +35 .316 +36 .398 +37 .501 +38 .630 +39 .794 +40 1.00 +41 1.25 +42 1.58 +43 2.00 +44 2.51 +45 3.16 +46 3.98 +47 5.01 +48 6.30 +49 7.94 +50 10.0 +51 12.6 +52 15.8 19.9 25.1 31.6 39.8 50.1 63.1 79.4 100 +53 +54 +55 +56 +57 +58 +59 +60 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = W 0.125 0.158 0.2 0.25 0.316 0.398 0.501 0.63 0.794 1 1.25 1.58 2 2.5 3.16 3.98 5 6.3 7.94 10 12.5 15.8 20 25 31.6 39.8 50 63 79 100 120 158 200 251 316 398 501 634 794 1000
R1=2R2R0*R0/(R2*R2-R0*R0) -L(dB) R2(Ω) R1(Ω) -L(dB) R2(Ω) R1(Ω) 1 820 5.6 16 68 160 2 430 10 17 66 178 3 300 18 18 64 194 4 220 24 19 63 220 5 180 30 20 61 250 6 150 39 21 60 272 7 130 43 22 58.6 314 8 120 51 23 57.6 352 9 100 62 24 56.7 397 10 92 72 25 55.9 447 11 89 82 26 55.2 505 12 83 94 27 54.6 567 13 78 108 28 54.1 649 14 75 120 29 53.6 719 15 72 134 30 53.3 782