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Slide Presentations for ECE 329, Introduction to Electromagnetic Fields, to supplement “Elements of Engineering Electromagnetics, Sixth Edition” by Nannapaneni.

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Presentation on theme: "Slide Presentations for ECE 329, Introduction to Electromagnetic Fields, to supplement “Elements of Engineering Electromagnetics, Sixth Edition” by Nannapaneni."— Presentation transcript:

1 Slide Presentations for ECE 329, Introduction to Electromagnetic Fields, to supplement “Elements of Engineering Electromagnetics, Sixth Edition” by Nannapaneni Narayana Rao Edward C. Jordan Professor of Electrical and Computer Engineering University of Illinois at Urbana-Champaign, Urbana, Illinois, USA Distinguished Amrita Professor of Engineering Amrita Vishwa Vidyapeetham, Coimbatore, Tamil Nadu, India

2 6.1 Transmission Line

3 Parallel-Plate Line Neglect fringing (d << w).

4

5

6

7 Consider the circuit

8 Then Transmission Line Equations

9 Transverse Electromagnetic (TEM) Waves

10 Distributed Equivalent Circuit
Assumes perfect conductors but lossy dielectric.

11 Transmission-Line Equations
L = Inductance per unit length (H/m) C = Capacitance per unit length (F/m) G = Conductance per unit length (S/m)

12 In general, conductors are also lossy. Then, the waves
are not exactly TEM waves. R = Resistance per unit length (/m)

13 (Perfect Conductors, Perfect Dielectric)
Lossless Line (Perfect Conductors, Perfect Dielectric) Combining, we obtain Wave Equation

14 Solution:

15

16 Thus

17 Parallel-Plate Line

18 Coaxial Cable

19 Parallel-Wire Line

20 Parallel-Strip Line (d/w  1)
imbedded in a homogeneous medium

21 Microstrip Line

22 Shielded Strip Line

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