Abstract
This chapter discusses the broad band impedance matching. Without knowledge of the impedance behavior of the device, it will be impossible to design any system for meeting the requirement. The characteristics of the broad band impedance matching network are derived from the impedance behavior of the device. This can be found from the voltage standing wave ratio (VSWR) and the position of the voltage minimum. While the impedance at each frequency could be calculated by use of the transmission line equations, it is much easier to use a Smith chart. In joining two transmission lines of the same characteristic impedance, that is, of the same ratio of inner to outer radius, but of different absolute radii, extra impedance is introduced. The impedance compensation is very simple, because the real component of the impedance to be compensated is within the limits of real impedance of the definition circle.
Published Version
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