> "The DLM [distributed load monopole] antenna is based on a
> lot of things that currently exist," said the researcher who
> invented the smaller antenna, Robert Vincent of the university's
> physics department, "but I've been able to put a combination
> of them together to create a revolutionary way of building
> antennas. It uses basically a helix plus a load coil." See
> for additional information.
Based on that article I have even more doubt about this so called
breakthrough ... considering the inventor doesn't seem to know the
difference between FM/TV towers and AM antenna sites.
"The patent-pending design could transform every antenna-from the
GHz models for cell phones to the giant, KHz AM antennas that
stud the high ground of metropolitan areas-Vincent said."
Rarely, if ever, will one find an AM broadcast site (535-1705 KHz)
on "high ground." They are generally on the wet, low-lying, high
conductivity sites. The high, rocky sites are absolutely the
worst sites for "KHz AM antennas."
BTW, this DLM technology sounds a lot like "variable pitch helical
loading" that was popular for mobile whips in the late 60s. It
was alleged to be a breakthrough advance over conventional coil
(base or mid-point) loading techniques. It never proved out except
as an advertising gimmick for 11 meter antennas.
... Joe, K4IK
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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