Textbook CHAPTER 8

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Textbook CHAPTER 8
WAVE GUIDES
8.1 INTRODUCTION
8.2 GUIDED MODES IN WAVE GUIDES .
8.3 TM MODES IN RECTANGULAR WAVE GUIDES .
8.4 TE MODES IN RECTANGULAR WAVE GUIDES .
8.5 FIELD CONFIGURATIONS IN WAVE GUIDES .
8.6 EXCITATION OF VARIOUS MODES IN WAVE GUIDES .
8.7 ENERGY FLOW AND ATTENUATION IN WAVE GUIDES .
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The orthonomral set of modal functions is
complete Every field can be expanded as a
linear combination os modal fields
The coefficients in the expansion are MODAL
VOLTAGES and MODAL CURRENTS
WAVE GUIDE SECTION
TRANSMISSION LINES
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A WAVE GUIDE IS EQUIVALENT TO A SET OF UNCOUPLED
MODES
Example
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CONSERVATION OF ENERGY IN EM FIELDS IN
TIME-DOMAIN
Rate if increase of electric and magnetic stored
energy
Power generated by the sources No generators
inside
Power dissipated
RADIATED power
CONSERVATION OF ENERGY IN EM FIELDS IN
FREQUENCY-DOMAIN (PHASORS)
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If two modes are propagating
Two transmission line PORTS (Two-Port)
If more waveguides form a junction
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Power density FLOW
Power FLOW
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ONE-PORTS
TWO-PORTS
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TWO-PORTS
ONE-PORTS
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Linear, passive. reciprocal two-ports
Lossless one-port
Lossless two-ports
IS UNITARY
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(5 meter, 70 mm)
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Textbook CHAPTER 9
ANTENNAS
9.1 INTRODUCTION
9.2 PHYSICAL ASPECTS OF RADIATION .
9.3 RADIATION FROM SHORT ALTERNATING CURRENT
ELEMENT .
9.4 BASIC ANTENNA PARAMETERS .
9.5 LINEAR WIRE ANTENNAS .
9.6 ANTENNA ARRAYS .
Assignment Read Chapters 9.1 and 9.2
Deadline Next Lecture on Tuesday, April 8th 2008
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