A: Microwave Formulas and Tables

Abstract

A.1 GENERAL TABLE A.1 General Decibel (dB) = 10 log(P O /P I) = 20 log(E O /E I) Neper = 1/2 Ln (P O /P I) = Ln (E O /E I) Neper = 0.1151 [dB Value] dB = 8.686 [Neper value] P O = Power at the output P I = Power at the input E O = Voltage at the output E I = Voltage at the input If log B X = A then B A = X = Antilog B A log(x) = common (Brigg's) logarithm = log 10 (x) = log e (x)/log e (10) ln (x) = natural (Napierian) logarithm = log e (x) = log 10