| Popis: |
In this article discusses the analytic theory of broadband matching is essential to understand the gain- bandwidth limitations of the given impedances to be matched. However, its applicability is limited beyond simple problems. By simple we mean those problems of single or double matching in which the generator and load networks include at most one reactive element, either a capacitor or an inductor. For simple impedance terminations, lowpass equal ripple or flat gain prototype networks, which are obtained employing the analytic theory, may have practical usage. On the other hand, if the numbers of elements that increase in the impedance models is to be matched, the theory becomes inaccessible. If it is capable of handling the problem, the resulting gain performances turn out to be suboptimal. Equalizer structures become unnecessarily complicated, and even it may not be feasible to manufacture them. Therefore, in practice, computer-aided-design (CAD) techniques are preferred; commercially available programs are employed to solve the matching problems. |
