Читать книгу Handbook of Microwave Component Measurements - Joel P. Dunsmore - Страница 19

In this section, many of the relevant parameters used in microwave components are derived from the fundamental measurements of voltage and current on the ports. For simplicity, the derivations will focus on measurements made under the conditions of termination in real valued impedances, with the goal of providing mathematical derivations that are straightforward to follow and readily applicable to practical cases.

In microwave measurements, the fundamental parameter of measurement is power. One of the key goals of microwave circuit design is to optimize the power transfer from one circuit to another such as from an amplifier to an antenna. In the microwave world, power is almost always referred to as either an incident power or a reflected power, in the context of power traveling along a transmission structure. The concept of traveling waves is of fundamental importance to understanding microwave measurements, and to engineers who haven't had a course on transmission lines and traveling waves, and even some who have, the concept of power flow and traveling waves can be confusing.