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1_2 lossless progation

1_2 lossless progation - Department of Electrical and...

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Department of Electrical and Computer Engineering ECSE 352 Electromagnetic Waves and Optics 1.2 Lossless Propagation on Transmission Lines References: Hayt and Buck 11.3 @AGK/ZM 1.2-1 Overview In the previous class we studied the behaviour of transmission li d d i d l i h h lines and derived a general wave equation that captures the time and space evolution of voltage and current. In this class we will look at the special case of lossless lines. This will allow us to develop a much simpler wave equation, and we will use this to find an expression for the speed of voltage and current waves We will also look at the relationship of voltage current waves. We will also look at the relationship of voltage and current and define the impedance of a transmission line. ©AGK/ZM ECSE 352 1.2-2 Transmission line classes A. Transmission line basics 1. Introduction 2. Lossless transmission lines 3. Harmonic waves on transmission lines 4. Time independent (phasor) notation 5 Power transmission and loss 5. B. Analog signal transmission 6. Resistive loads and reflections 7. Voltage standing wave ratio 8. Finite lines and input impedance 9. Smith chart calculation techniques 10 Single stub matching 10. C. Digital signal transmission 11. Transient analysis ©AGK/ZM ECSE 352 1.2-3 12. Pulse propagation and initially charged lines Contents Review of general transmission line model Voltage and current on lossless transmission lines Signal speed on lossless lines Th l ti hi b t lt d t The relationship between voltage and current Transmission line impedance ©AGK/ZM ECSE 352 1.2-4
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