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Patent #2:

April 2008 - submitted patent application for the "FREQUENCY AGILE ELECTRICALLY SMALL TACTICAL AM BROADCAST BAND ANTENNA SYSTEM" (the TTLCM for short).  The size tested is 67 feet tall, and its performance is almost as good as a quarterwave monopole, proven by field testing under stringent conditions by Hatfield & Dawson on two separate test dates separated by 1 year or more.  The "why didnt I think of that" patentable idea behind this antenna  will be described here as soon as we get word from the USPTO that the application is being processed.

The text for the TTLCM will be linked here

Patent #1: Google Link    and  The US Patent Office Link for the MRA patent - click this

December 2004 - the MRA "Minimal Reactance Antenna" - a design improvement upon the Gap Super C antenna (also patented).  Essentially, the MRA has a "capacance skirt" which is electrically connected at the top of a very short monopole.  The Super C shorts the basket at the bottom, thus creating a fat radiator.  The MRA works.  The capacitance of the skirt is unfortunately in series with any top capacitance.  So, adding a taller mast with topload wires defeats the purpose of the skirt, which is to keep the antenna short.  The other minor problem with trying to make this antenna work at much lower frequencies for its given size (18 ft diameter) is the amount of aluminum required.  Don Mcormick chased down the patent application paperwork for me.  I was too busy getting ready to go to Iraq and end a marriage.  He built the early PVC versions according to my design and attempted the early modeling & simulations.  Dean Glace, WA4MMO, helped with fabrication and went with me in 2001 to visit Gap Antenna Products in Fellsmere FL, Mr. George Henf (now deceased).  One fascinating property of this antenna is the ground radial field can be smaller.  Probably due to the solid aluminum plane (the trampoline looking part).


 
Copyright 2005, K.Crawley/WB4ENE St.George SC