Page 488 - Engineering Electromagnetics, 8th Edition
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470 ENGINEERING ELECTROMAGNETICS
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Figure 13.15 The net phase shift over
around trip in the parallel-plate guide is
found by first measuring the transverse
phase shift between plates of the initial
upward wave (a); next, the transverse
phase shift in the reflected (downward)
wave is measured, while accounting for
the reflective phase shift at the top plate
(b); finally, the phase shift on reflection at
the bottom plate is added, thus returning
to the starting position, but with a new
upward wave (c). Transverse resonance
occurs if the phase at the final point is the
same as that at the starting point (the two
upward waves are in phase).
