4.3 - Department of Electrical and Computer Engineering...

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Department of Electrical and Computer Engineering ECSE 352 Electromagnetic Waves and Optics 4.3 Phase and group velocity in the parallel plate waveguide References: Section 14.2, 14.3 on’t forget to submit your course evaluations! @AGK 4.3-1 Don t forget to submit your course evaluations! Learning outcomes After taking this class you should be able to: • Apply the equations for group velocity and phase velocity in waveguides ustify the statement that waveguides are Justify the statement that waveguides are dispersive • Calculate modal dispersion in a waveguide • Sketch the electric field distribution for the TE mode in parallel plate waveguides l t th l t i fi ld i ll l l t Relate the electric field in a parallel plate waveguide to interference between two plane waves ECSE 352 4.3-2 Waveguiding • Waves are confined via: – Conductors (metallic waveguides): applied to microwaves – Dielectrics (glass or plastic): applied to optical waves • Waves travel in a variety of modes, not just TEM Rectangular λ /2 λ λ waveguide 1. 2. 3. Parallel plate waveguide ECSE 352 4.3-3 Modes Dielectric waveguide From transmission line to waveguide EM wave between conductors = TEM wave between conductors Transmission line k ω με = Non-TEM wave between conductors = waveguide k = u k d k ud kk ωμε == u k d k E H u k d k E H ECSE 352 4.3-4 Transverse electric (TE) Transverse magnetic (TM)
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This note was uploaded on 08/17/2011 for the course ECSE 351 taught by Professor Davis during the Spring '08 term at McGill.

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4.3 - Department of Electrical and Computer Engineering...

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