161_1_Lecture_7

161_1_Lecture_7 - EE161 El EE161 Electromagnetic Waves...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
EE161 Electromagnetic Waves all 2010 Fall, 2010 Instructor: Dr. Shenheng Xu Electrical Engineering Dept., UCLA gg p , © Prof. Y. Ethan Wang
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ecture 7 Lecture 7 • Introduction to Waveguide • General Waveguide Solutions • TEM Waves arallel Plates Parallel Plates – Coaxial Cable
Background image of page 2
istory of Waveguides History of Waveguides 1893 - Heaviside considered the possibility of wave propagation inside a hollow tube, soon he denied himself 1897 - Lord Rayleigh (Cambridge) proved wave propagation inside a hollow tube is possible, for both circular and rectangular cross- sections 1932 - Rediscovered and experimentally validated by G.C. Southworth (AT&T) & W. L. Barrow (MIT) independently 1950s - Development of planar lines (stripline, microstrip….) . .
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Waveguides Definition: Guiding structures for Electromagnetics Waves Features: Infinitely long, transverse cross-sections are the same Methodology of Analysis: -Assuming longitudinal variation of the field is known as exponential and solve for the transverse variation of the field for given B.C. -Separate different field components and solve for one of them (longitudinal one) first - olve for other field components based on transverse- ngitudinal Solve for other field components based on transverse longitudinal relationship
Background image of page 4
Waveguide Solutions General waveguide field solutions are propagating in z direction can be written as: transverse variation   z j z j z e y x e z y x z y x ˆ ~ ) , ( ˆ ) , ( ) , , ( ~ t e E longitudinal variation   z e y x h z y x z y x ) , ( ) , ( ) , , ( t h H transverse component longitudinal component TEM waves: 0 z z H E TE waves: 0 , 0 z z H E TM waves: 0 , 0 z z H E ther hybrid waves Other hybrid waves
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
TEM Waves (1) TEM waves is defined for the possibility of solution that satisfies: 0 z z H E he above assumption of the field direction determines that the wave ne can either guess or prove that
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/09/2011 for the course EE 161 taught by Professor Huffaker during the Spring '08 term at UCLA.

Page1 / 15

161_1_Lecture_7 - EE161 El EE161 Electromagnetic Waves...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online