[Knightsqrss] An Off topic response to use of the MicroVert antenna

[Steinar Aanesland]

Hi all,

Yes I know. This is off topic, but take the chance and hope that I am 
not being flamed to bad.

How this MicroVert antenna is working has been a mysterious to me. I 
have been playing with half-wave end-feeded vertical for a long time, 
and my first thought was that this  was a sort of an unbalances 
half-wave dipole, or may be some kind of a top loaded vertical . But 
Jürgen Schäfer, DL7PE's explanation of how this antenna works dos not 
fit in with the conventional antenna theory I know.

I crawled the the World Wide Web up and down to find something , then I 
stumble across this side: http://members.aol.com/dj5il/mv.htm#englisch . 
It is long and ugly,  but worth a look. The conclusion is not so nice to 
the MicroVert :

" (..) these antennas are in reality no extremely short monopoles but 
off-center fed asymmetrical dipoles which, with a length short of l/4, 
are still almost half as long as a conventional halfwave-dipole (insofar 
"MicroVert" is a real misnomer). And only because the coax-segment 
contributes to radiation the efficiency is much higher than for an 
extremely short monopole. Anyone who denies that fact abnegates in the 
figurative sense the 90 % of an iceberg that are under the water !"

You are a bunch of smart guys so what do you think about dj5il's analyze 
of the antenna ? Is it nonsense ? I am very interested in small antenna 
system so I would be very happy to know your opinion. If you don't want 
to spam the group , please send your answer directly to me.

73 de LA5VNA Steinar