RF power calculation

In the test of radio frequency circuit modules, we often encounter the problem of calculating power. If you use a spectrum analyzer to test, the display is dBm, which is inconsistent with the power in people’s common sense, W, and it is inconvenient to remember, so it needs to be converted. , Normal conversion requires antilog, but most calculators have no antilog, or even no logarithm. At this time, the following method can be used: First divide the measured dBm by 10, and then The obtained number can be obtained by the power of 10 to the power of mW. Finally, multiply this value by 1000 to obtain W. That is the power expression we conventionally say. for reference only!