Transmission lines are commonly used to connect test and measurement instruments to the device under test. Transmission lines are used to control the effects of inductance and capacitance, which are unavoidable in high-frequency systems. Coaxial cables are the most common transmission lines, providing shielding of the signals being measured. Measurement error can be introduced due to impedance mismatch at either end of a transmission line. These errors must be understood and minimized to ensure an accurate measurement.

Chapter Contents:

• 11.1 The Need for Transmission Lines
• 11.2 Distributed Model
• 11.3 Characteristic Impedance
• 11.4 Propagation Velocity
• 11.5 Generator, Line, and Load
• 11.6 Impedance Changes
• 11.7 Sinusoidal Voltages
• 11.8 Complex Reflection Coefficient
• 11.9 Return Loss
• 11.10 Standing Waves
• 11.11 Input Impedance of a Transmission Line
• 11.12 Measurement Error Due to Impedance Mismatch
• 11.13 Insertion Gain and Loss
• 11.14 Line Losses
• 11.15 Coaxial Lines
• Bibliography

Inspec keywords: transmission lines; inductance; capacitance; measurement errors

Other keywords: capacitance; transmission lines; impedance mismatch; coaxial cables; inductance; measurement error

Subjects: Transmission line links and equipment; Wires and cables; Measurement theory; Transmission line theory