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Transmission Lines Theory
This lecture introduces the theory of transmission lines, starting by defining what a transmission line is and why waves propagate in them. Different types of transmission lines are discussed, such as bifilar lines, coaxial cables, parallel plate guides, ribbon lines, and microstrip lines. The lecture explains how to model a small portion of a transmission line as an equivalent circuit with capacitance and inductance, based on the assumption of lossless lines. The concepts of capacitance per unit length and inductance per unit length are introduced, highlighting their importance in defining the characteristics of different types of transmission lines.