[Antennas] Broadbanding an antenna...

Tue May 22 14:07:46 EDT 2012

Charles Michaels, W7XC, (someone else has this call now), designed and 
built an interesting network to successfully broadband his short 160 
meter vertical. He called it a "Load Tracking Network". It was 
published in the April issue, 1992, QST.
I've not seen any other reference materials or articles on his 
approach. It involved designing a series inductance plus a shunt "L-C" 
network. The shunt network resonated at about 3.4 Mhz thus had the 
reverse reactance characteristic of what occurred as he tuned off of his 
optimum frequency. It seems like a valuable approach to broadbanding 
and antenna.
Has anyone else has expanded or written on such a "Load Tracking 
Network" that it could be more easily utilized in other narrow banded 
applications such as HF mobile antennas or other bands?
Thanks for your attention.
73,
Ray, W4BYG