January 1997
Beginner
435 pages
18h 29m
English
Content preview from Microwave and Wireless Communications Technology
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1 18 THE SMITH CHART
Figure 6-4D shows how to plot impedance and admittance on the Smith
chart. Consider an example in which system impedance Zo is 50 f~ and the load im-
pedance is
ZL
= 95 + j55 f~. This load impedance is normalized to
Z =
ZL
(6-6)
Zo
Z = 95 + j55 f2 (6- 7)
50 f~
Z = 1.9 + j1.1 (6-8)
An impedance radius
is constructed by drawing a line from the point represented by
the normalized load impedance, 1.9 + j1.1, to the point represented by the normal-
ized system impedance (1.0) in the center of the chart. A circle is constructed from
this radius and is called the
VSWR circle.
Admittance
is the reciprocal of ...
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