Abstract
AbstractImpedance transformers and matching networks are probably the most widely used building blocks in both passive and active radiofrequency (RF ) and microwave circuits, which can be found everywhere in various systems and applications. The transmission‐line technique is fundamental in the design of impedance transformers and matching networks at microwave frequencies, whatever distributed or lumped element platforms are used. This article presents the basic structures and electrical mechanisms of impedance transformers and matching networks as well as transmission‐line transitions, including typical balun structures. Properties and performances of various circuit elements are summarized, discussed, and compared. Popular examples are shown to highlight application aspects and technical features of practical impedance transformers and matching networks.
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