July 2002
Intermediate to advanced
344 pages
8h 37m
English
Content preview from Newnes Radio and RF Engineering Pocket Book, 3rd Edition
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47
mode with no magnetic field in the direction of propagation, TM; the
European system uses the field that is modified and an American TE
wave is a European TM wave. In the European system H and E may
also be used in lieu of (American) TE and TM.
The behaviour of waves in circular waveguides is similar to that in
rectangular guides. Circular waveguides minimize feeder attenuation
and are particularly suitable for long vertical runs. A single circular
waveguide can carry two polarizations with a minimum isolation of
30 dB. Circular waveguides are recommended where attenuation is
critical or where multi-band capability is needed.
Elliptical waveguides have ...
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