Abstract
AbstractThis chapter introduces the topic decibel in a compact form. Decibel is defined as the ratio of two quantities, typically power, voltage, or current. In the field of EMC, the decibel must be understood. One advantage of decibels is that a gain of 10 dB means a gain of 10 dB for current, voltage, and power likewise. This fact helps to prevent misinterpretations and helps to simplify things. This is the main reason why EMC and high-frequency system engineers like to work with decibels.This chapter assumes that values of voltages V [V], currents I [A], power P [W], electric field strengths E [V/m], and magnetic field strength H [A/m] are given as root-mean-square (RMS) values.
Publisher
Springer International Publishing