Reflection Coefficient and VSWR - Part II — Lesson 3

This lesson covers the concepts of transmission lines, reflection coefficient, and Voltage Standing Wave Ratio (VSWR) in the field of microwave engineering. It delves into the equations governing transmission lines, the challenges posed by the source reference plane, and the concept of a standard reference. The lesson also explains the concept of impedance and its relationship with voltage and current. It further discusses the concept of reflection coefficient, its calculation, and its significance in microwave engineering. The lesson concludes with an explanation of the Voltage Standing Wave Ratio (VSWR), its calculation, and its importance in the design of microwave systems.

Video Highlights

00:15 - Impedance of loaded transmission line
04:00 - Impedance of lossless transmission line
08:03 - Concept of Matched Line and impedance matching
09:23 - Quarter Wave Length Transmission Line
10:55 - Explanation of the Concept of Reflection Coefficient
15:08 - Power Dissipated at the Load .
18:04 - Voltage Standing Wave Ratio

Key Takeaways

- Transmission lines are governed by two equations, one for voltage and one for current.
- The impedance of a transmission line should be equal to the ratio of voltage upon current.
- The reflection coefficient is the ratio of the negative traveling wave to the positive traveling wave.
- The Voltage Standing Wave Ratio (VSWR) depends only on the magnitude of the waves of the incident and reflected waves.
- A perfect matching, where the load matches the characteristic impedance of the transmission line, corresponds to a VSWR of 1.