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ECSE 352: Electromagnetic Waves
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ECSE 352: Electromagnetic Waves
09:00 – 12:00, December 15, 2008
Examiner:
Zetian Mi
Associate Examiner:
Andrew Kirk
Student Name:
McGill ID:
Instructions:
•
This is a
CLOSED BOOK
examination. Only the
EQUATION SHEET
provided may be
used.
•
STANDARD CALCULATOR
permitted only.
•
SPACE IS PROVIDED
on the examination to answer all the questions, and
SHOW ALL
WORK
to receive full credits
•
The first section of this test consists of ten short questions, and the second section consists
of four questions requiring calculation.
You are required to answer all the questions in
both sections I and II.
•
Do not try to fully answer each question if it means that you will have insufficient time to
attempt the others.
•
The total number of marks for the test is 100. Questions in section 1 are worth a total of 30
points. Section 2 is worth a total of 70 points.
•
The test consists of 8 pages (including this page), plus a formula sheet. Please ensure that
you have a COMPLETE examination paper before starting.
December 2008
Final Examination
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View Full Document ECSE 352: Electromagnetic Waves
2 of 8
Section I
1.
The resistance of a transmission line typically increases as the operating frequency increases,
please explain why. [3 points]
When frequency increases, the sin depth decreases. This leads to a reduced effective area for
transmission lines. Therefore, resistance increases.
2.
What are the lowest TM and TE modes in a rectangular waveguide? [3 points]
TM11, TE01 or TE10 (depending on the geometry)
3.
What are the essential differences in the propagation characteristics of dielectric and conducting
waveguides? [3 points]
Dielectric: evanescent wave in the cladding region; The lowest mode has no cutoff; For a given
design, the number of operating modes is limited.
4.
Is it possible that lossy transmission lines, i.e.
ܴ,ܩ ് 0
, can be distortionless? Please support your
statement. [3 points]
Yes. Heavyside’s condition G/C=R/L
Æ
no dispersion even for lossy lines.
5.
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This note was uploaded on 02/14/2011 for the course ECSE 352 taught by Professor Mi during the Fall '10 term at McGill.
 Fall '10
 mi

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