功率与dbm的对照表

《功率与dbm的对照表》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、对于无线工程师来说更常用分贝dBm这个单位，dBm单位表示相对于1毫瓦的分贝数，dBm和W之间的关系是：dBm=10*lg(mW)1w的功率，换算成dBm就是10×lg1000＝30dBm。2w是33dBm，4W是36dBm……大家发现了吗？瓦数增加一倍，dBm就增加3。为什么要用dBm做单位？原因大致有几个：1、对于无线信号的衰减来说，不是线性的，而是成对数关系衰减的。用分贝更能体现这种关系。2、用分贝做单位比用瓦做单位更容易描述，往往在发射机出来的功率几十上百瓦，到了接收端已经是以微微瓦来计算了。3、计算方便，衰减的计算公式用分贝来计算只用做加减法

2、就可以了。  以1mW为基准的dB算法，即0dBm=1mW，dBm=10*log(Power/1mW)。发射功率dBm－路径损失dB＝接收信号强度dBm最小通信功率dBm－路径损失dB≥接收灵敏度下限dBm最小通信功率dBm≥路径损失dB＋接收灵敏度下限dBm                                                      功率与dbm的对照表                                                              mWdBm                  

3、              01.0mW                                11.3mW                                21.6mW                                32.0mW                                42.5mW                                53.2mW                                64.0mW                               

4、 75.0mW                                86.0mW                                98.0mW                                1010mW                                1113mW                                1216mW                                1320mW                                1425mW      

5、                          1532mW                                1640mW                                1750mW                                1864mW                                1980mW                                20100mW                                21128mW                 

6、               22160mW                                23200mW                                24250mW                                25320mW                                                                                             dBmWatts                                26400mW

7、                                27500mW                                28640mW                                29800mW                                301.0W                                311.3W                                321.6W                                332.0W          

8、                      342.5W