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Impedance Matching

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basic matching concepts 1High Frequency Design

MATCHING NETWORKS

From March 2006 High Frequency Electronics Copyright 2006 Summit Technical Media

The Yin-Yang of Matching: Part 1―Basic Matching Concepts
By Randy Rhea Agilent Technologies hen an electrical signal propagates through media, a portion of the signal is reflected at the interface between sections with differing impedances. This is analogous to light reflection in optical systems. The reflected signal may pose problems, and the power in the reflected signal reduces the transmitted power. Figure 1 shows the impedance chart developed by Phillip Smith [1]. Any impedance with a positive real part may be displayed on the standard, unity radius Smith chart. The horizontal line is pure resistance. Circles with a center on this line are constant resistance. ……
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Impedance Matching
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