Читать книгу Handbook of Microwave Component Measurements - Joel P. Dunsmore - Страница 66

With a few exceptions, passive components follow some fundamental rules that greatly simplify their characterization; principally, they are linear, so their characterization doesn't depend on the power of the signal used to characterize them, but only on the frequency. Active components, on the other hand, are sensitive to power, and their responses to both frequency stimulus and power stimulus are important. Often, passive components are operated well below any power level that causes a change in their response, but more and more active components are being driven into higher‐power operation to optimize their efficiency.