
Measuring Impedance Using the Smith Chart
The amount of power reflected from a device is directly related to the
impedances of both the device and the measuring system. Each value of the
complex reflection coefficient uniquely defines a device impedance; for
example, = 0 only when the device impedance and the system impedance
are exactly the same.
The Smith chart is a tool used to map the complex reflection coefficient to
the
impedance. In a Smith chart, the complex impedance plane is
reshaped to form a circular grid, from which the resistance and reactance
can be read. (See Figure 3-23 for more information on the Smith chart.)
Marker features on the analyzer display the resistance and reactance in units
of ohms, and the equivalent capacitance or inductance in units of farads or
henrys.
This section uses an example measurement to describe how to measure the
input impedance of a
Содержание 8712C
Страница 1: ...I I User s Guide HP 8712C and HP 8714C RF Network Analyzers I ...
Страница 17: ...I 1 Installing the Analyzer ...
Страница 35: ...I 2 Getting Started ...
Страница 54: ...I 3 Making Measurements ...
Страница 81: ......
Страница 119: ...4 Using Instrument Functions ...
Страница 182: ...Using Instrument Functions Customizing the Display Figure 4 24 Expanded Display 4 64 ...
Страница 223: ...5 Optimizing Measurements ...
Страница 244: ...6 Calibrating for Increased Measurement Accuracy ...
Страница 280: ...7 Automating Measurements ...
Страница 298: ......
Страница 362: ...8 Front Rear Panel ...
Страница 373: ......
Страница 381: ......
Страница 386: ... 9 w I Suftkey Reference ...
Страница 477: ...I 10 Specifications and Characteristics ...
Страница 501: ...11 Safety and Regulatory Information ...
Страница 508: ...I 12 preset State and Memory Allocation ...
Страница 527: ...Index ...
Страница 559: ...Y X 9 91 YYW m m IiH rn 9 91 Z zeroing detectors 6 15 Index 33 ...