Fundamentals of Applied Electromagneticsece381/SECURE/Class_Lectures/First_day... · Fundamentals...
Transcript of Fundamentals of Applied Electromagneticsece381/SECURE/Class_Lectures/First_day... · Fundamentals...
Department of Electrical and Computer Engineering The University of Arizona
Richard W. Ziolkowski
Fundamentals of Applied Electromagnetics
Thoughts borrowed from course presentation materials
Fundamentals of Applied Electromagnetics Ulaby and Ravaioli 7th Ed
Spring Semester 10 January, 2018
Maxwell’s Equations
Time and Phasor Domain
It is much easier to deal with exponentials in the phasor domain than sinusoidal relations in the time domain Just need to track magnitude/phase, knowing that everything is at frequency ω
Maxwell’s Equations
Sinusoidal time variations
Materials: ε, µ - time independent, isotropic, homogenous, linear
Static vs. Dynamic Static conditions: (a) charges are stationary or moving, but if moving, they do so at a constant velocity (b) size of system much smaller than a wavelength
Under static conditions, electric and magnetic fields are independent, but under dynamic conditions, they become coupled.
Types of Waves
Plane Waves: fundamental solutions of Maxwell’s equations E
H D.O.P. TEM Wave
Guided EM Waves Unbounded EM Waves
Types of Transmission Modes TEM (Transverse Electromagnetic): Electric and magnetic fields are orthogonal to one another, and both are orthogonal to direction of propagation
Examples of Antennas
Dimensions and Units
The EM Spectrum
Examples of EM Applications
Sci-Fi becomes reality – enabled by EM
What is Next ????
Fifth Generation Wireless: 5G Lower Latency, Higher Data Rates
Massive MIMO
High Directive Beams Higher Frequencies
IoT