Quote:
Originally Posted by qasdfdsaq
Your electronics and radio telecoms training seems to have missed out some very basic principles then it seems, like higher order propagation modes.
http://whites.sdsmt.edu/classes/ee48...1Lecture10.pdf
Aerial dipoles are not made thicker to increase bandwidth.
---------- Post added at 10:30 ---------- Previous post was at 10:29 ----------
Exactly this. Thicker cables will carry higher frequencies and more power longer and further as long as those frequencies don't exceed the maximum cut-off frequency (i.e. bandwidth) of the cable .
---------- Post added at 10:31 ---------- Previous post was at 10:30 ----------
Without girth, length would be impossible. But without length, the girth would be useless. |
Thicker elements on a dipole will provide a wider VSWR bandwidth, the technology is used with birdcage dipole elements. Thicker wire in coils for filters will have the opposite effect, having a higher Q than thinner wire produces a narrower bandwidth. Duplex filters or notch filters of the lumped variety etc are often made with microbore plumbing pipe or thick silver coated wire to provide the low losses and high Q required for a sharp cut -off in the case of a duplex filter or narrow bandwidth and low out of band losses for notch filters.
Birdcage antennas often get mistaken for the fan dipole variety, these use thinner cables of slightly different lengths to broaden the resonance.