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分贝毫瓦.
分贝毫瓦(dBm,全写为“decibel relative to one milliwatt”)为一个指代功率的绝对值,而不同于dB只是一个相对值。
任意功率P(mW)与xdBm换算的公式如下:
[1]
以及
。
例如,1毫瓦(1 mW)换算成分贝毫瓦为0dBm。1瓦特(1 Watt)换算成分贝毫瓦则为30dBm。
- ^ 高曜煌. 《射頻技術在行動通訊的應用》. 全华. 2017: 第1–3页. ISBN 9789864636570.
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