This calculator converts the ratio of output power to input power of an RF system into decibels. It is useful for comparing power gains or losses in amplifiers, filters or antenna arrays.
Designed for RF engineers, technicians and students, it simplifies rapid evaluation of the performance of radio frequency components and signal chains.
Formula
dB ratio = 10 × log10(P out / P in )
Explanation of the formula
- P out is the output power, and P in is the input power.
- The logarithm to base 10 expresses the relative difference between the two powers.
- A positive result indicates a gain, while a negative result indicates a loss.
RF power conversion: 1 W to 2 W
Input : P in = 1 W, P out = 2 W
Output : Ratio = 3.01 dB
Benefits and uses
- Allows you to quickly assess power gain or loss in dB.
- Useful for designing and testing RF and microwave systems.
- Makes it easier to compare multiple amplifiers or filters.
- Practical for technical documentation and performance validation.