功率比

以 dB 的形式确定从一个瓦特级到另一个的功率比，输入下面的值，然后按下“计算”键。

  • 瓦特
  • 瓦特
  • dB

A change in power, from P1 to P2 can be expressed as a ratio in decibels with the equation dB = 10*log(P2/ P1) . A doubling in the power level translates to a power ratio of 3 dB. Similarly, halving the power equals a -3 dB power ratio.

  • dB = 10 log (P2/P1)

FAQs

The power ratio calculator converts power ratios into decibel (dB) values.

They are used to analyze signal power changes and system gain.

Yes. Power ratios and voltage ratios use different calculations.

It is used in signal chain analysis and gain structure planning.