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RE: [TowerTalk] more info on new URI antenna

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Subject: RE: [TowerTalk] more info on new URI antenna
From: "Joe Subich, K4IK" <>
Date: Tue, 8 Jun 2004 15:49:26 -0400
List-post: <>

> "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:  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
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