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Microwave Engineering
book

Microwave Engineering

by Ahmad Shahid Khan
May 2014
Intermediate to advanced content levelIntermediate to advanced
800 pages
24h 50m
English
CRC Press
Content preview from Microwave Engineering
117Waveguides
3.4.5 Mode Designation in Circular Waveguide
In the TM case, the wave equation is solved for E
z
. At the conductor surface,
E
z
= 0 and thus J
n
(ha) = 0. In view of Equation 3.8, for a propagating wave
h
2
<
ω
2
με
. This requires that either h is small or the frequency is high. To meet
this requirement, only a few roots of J
n
(ha) = 0 will be of practical importance.
Such rst few roots are (ha)
01
= 2.405, (ha)
11
= 3.85, (ha)
02
= 5.52 and (ha)
12
= 7.02.
These roots can thus be designated as (ha)
nm
. In (ha)
nm
, the rst sufx (n) is
the order of Bessel’s function and the second sufx is the number of root.
Similarly, the rst ...
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Publisher Resources

ISBN: 9781466591417