回波损耗换算表.pdf

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1、7.4驻波与回波损耗换算表VSWR=Vmax/VminΓ=(VSWR-1)/(VSWR+1)RL=20Log(IΓI)22HDML=20Log(1−Γ)=10Log(1-Γ)驻波比电压反射系数回波损耗失配损耗VSWRΓReturnLoss(dB)MismatchLoss(dB)1.000∞01.020.01040.090.00041.040.02034.150.00171.06Microwave0.02930.710.00371.080.03828.300.00641.100.04826.440.00991.120.057

2、24.940.0141.140.06523.690.0191.160.07422.610.0241.180.08321.660.0301.200.09120.830.0361.220.09920.080.0431.240.10719.400.0501.260.11518.780.0581.280.12318.220.0661.300.13017.690.0751.400.16715.560.1221.500.20013.980.1771.600.23112.740.2381.700.25911.730.3021.800.2

3、8610.880.3701.900.31010.160.4302.000.3339.540.5122.100.3559.000.5842.200.3758.520.6592.300.3948.090.732467驻波比电压反射系数回波损耗失配损耗VSWRΓReturnLoss(dB)MismatchLoss(dB)2.400.4127.710.8072.500.4297.360.8812.750.4676.601.06HD3.00.5006.021.253.250.5295.541.453.50.5565.101.6040

4、.6004.441.9450.6673.522.5660.7142.923.10Microwave70.7502.503.6080.7782.184.0390.8001.944.44100.8181.744.81200.9050.877.41300.9350.589.04400.9510.4310.22500.9610.3511.147.5常用微波波段的划分微波是电磁波谱中介于超短波与红外线之间的波段，它属于无线电波中波长最短（即频率最高）的波段，其频率范围从300MHz(波长1m)至3000GHz(波长0.1mm)。通常

5、又将微波波段划分为分米波、厘米波、毫米波和亚毫米波四个分波段，在通信和雷达工程上还是用拉丁字母来表示更细的分波段。图7.5-T1给出了微波在电磁波谱中的位置，表7.5-B1给出了常用微波波段的划分，表7.5-B2给出了常用微波分波段的划分。近红外光纤工作区-60.75-1.55X10远红外赤橙黄绿青蓝紫可见光超长波中波米波厘米波亚毫米波中红外长波短波分米波毫米波紫外线X射线波长(m)5432-1-2-3-4-5-6-7-8-910101010101101010101010101010-60.760.4X10频率(Hz)3K

6、30K300K3M30M300M33G0G300G3T30T3300T3P30P00P图7.5-T1微波在电磁波谱中的位置468