Power ratio of two waves in decibels. The rms electric field intensities of two time...

Power ratio of two waves in decibels. The rms electric field intensities of two time-harmonic uniform plane waves are E1 and E2, respectively, and the corresponding time-average Poynting vector magnitudes are P₁ and P₂. Write a function dBPowerRatio() in MATLAB that returns the power ratio for the two waves in decibels (A_dB), Eq.(7.16), for the given field ratio E₁/E₂ or power ratio P₁/P₂. Input data to the function are the value of one of the ratios and one character to signify which ratio is used: the letter P means the power ratio, and any other letter (character), for instance, F, indicates the field ratio. Using this function, compute A_dB for the following values of E₁/E₂: 100, 10, 2, 1.41, 1, 0.707, 0.5, 0.1, and 0.01. (dBPowerRatio.m on IR) H⁴

Reference: Equation(7.16)