Download presentation

Presentation is loading. Please wait.

Published byKaty Fagley Modified over 2 years ago

1
Laws of Electromagnetism

2
Beginning of Electromagnetics Henry Cavendish Coulomb’s Law Ohm’s Law Relation to Maxwell

3
Beginning of Electromagnetics The Cavendish Apparatus

4
Beginning of Electromagnetics Cavendish in his Laboratory

5
Pioneers of the Field Benjamin Franklin Concept of electricity Lightning is electrical Use of electrical ground

6
Andre Marie Ampere Ampere’s Law Pioneers of the Field

7
Johann Carl Friedrich Gauss Gauss’s Law

8
Pioneers of the Field Michael Faraday Faraday’s Law

9
Pioneers of the Field George Gabriel Stokes Stokes’s Theorem

10
Pioneers of the Field James Clerk Maxwell Maxwell’s Equations

11
Pioneers of the Field Sir J C Bose Short wavelength radio waves Existence of EM radiation from sun Sir J. C. Bose invented the Mercury Coherer (together with the telephone receiver) used by Marconi to receive the radio signal in his first transatlantic radio communication over a distance of 2000 miles in December 1901. Marconi was celebrated worldwide for this achievement, but the fact that the receiver was invented by Bose was totally concealed

12
Pioneers of the Field Sir J C Bose’s Apparatus

13
Pioneers of the Field Sir J C Bose Bose’s spiral-spring receiver used for 5-mm radiation One of Bose's transmitter antennas

14
Pioneers of the Field J.C. Bose at the Royal Institution, London, 1897

15
Pioneers of the Field Sir J C Bose A close up of the spark gaps normally mounted inside the transmitting antenna

16
Sir J C Bose A complete set up showing the transmitting antenna at the left, with the receiving antenna at right Pioneers of the Field

17
Applications in Wireless Communication Guglielmo Marconi Invention of Radio Concept of Ionosphere Wireless Telegraph

18
Applications in Wireless Communication Marconi’s 2 meter antennae

19
Applications in Wireless Communication Heinrich Hertz First Wireless link in 1901 First to broadcast and receive radio waves Produced EM waves and measured their wavelength & velocity

20
Hertz’s Experiment Copy Right: Pozar D.M., “ Microwave Engineering”, John Wiley & Sons. Applications in Wireless Communication

21
Hertz Resonator Applications in Wireless Communication

22
Hertz’s First Spark Gap Oscillators Applications in Wireless Communication

23
Relationship between current density and radiation

24
Maxwell’s Equations Frequency Domain

25
Laws in Media With Dielectric Constant as Tensor Maxwell’s Two Curl Equations get modified as Appleton-Hartee Equation Where

26
Fractional Domain Electrodynamics Fractional Dimension Sierpinski triangle

27
Koch curve Fractional Domain Electrodynamics Construction Dimension

28
Fractional Domain Electrodynamics Fractional Calculus Hausdorff-Besicovitch Dimension Fractional derivative & example

29
Fractional Domain Electrodynamics Measurement of Hausdroff-Besicovitch Dimension where N(h) is the number of disks of size h needed to cover the object Thus Koch coastline has a Hausdorff-Besicovitch dimension is Theoretically Experimentally By surrounding the Koch coastline with boxes

30
Fractional Domain Electrodynamics Measurement of Hausdroff-Besicovitch Dimension Surrounding the Koch Coastline with Boxes & graph

31
Fractional Domain Electrodynamics Measurement of Hausdroff-Besicovitch Dimension Experimental data Dimension(experimental) =1.18 Dimension(Theoretical) =1.26 Deviation=6%

32
CONCLUSION In this project we have tried to represent the Maxwell’s equations of EM in fractional dimension which is one of the emerging field in electromagnetics And studied the effect of EM field in ionospheric propagation Application of electromagnetics in wirelwss communication

33
REFERENCES: [1] Sadiku M. N.O.Elements of Electromagnetics,Oxford,2002 [2] Colin R.E. “Microwave Engineering”,Mc Graw Hill,2000 [3] H.O.Peitgen,H.Jurgens & D. Saupe,”Chaos and Fractals”:New Frontiers of Science. New York, Springer Verlag, Inc., 1992 [4] B. B. Mandelbrot, “The Fractal Geometry of Nature, San Fransisco, CA:Freeman,1983 [5] www.factus.com [6] www.fractenna.com [7] www.mathworld.com

34
Thank You

Similar presentations

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google