[TowerTalk] Matching network for wire antenna needed

[TexasRF--- via TowerTalk]

Conceptually this could be done using 50 ohm coax stub matching. 
 
Starting with the R +j of the four band segments, a design for each band  
series segment can be done. Then starting with the shortest series section,  
additional series cables can be added to achieve the proper length for the  
remaining three band segments. The junctions of the four series coax  
sections can be connected with Tee connectors. Then four shunt stubs  could be 
connected by means of suitable relay on the third leg of the Tee  connectors.
 
I have not done this for the stated application but have used the concept  
to switch a 40m beam from cw to phone frequencies with excellent results. In 
 this case, only two stubs were switched in/out.
 
When doing the design, there are multiple solutions with stub matching.  
Some solutions require a shorted stub, others require an open stub. One can  
visit the various solutions and choose one that minimizes the amount of coax  
needed. 
 
As usual, I am only the concept guy; you have to do the work. Transmission  
line software will make the job easier.
 
73,
Gerald K5GW
 
 
 
 
 
 
 
 
 
 
 
 
In a message dated 9/14/2014 8:45:25 A.M. Central Daylight Time,  
gmarks at neo.rr.com writes:

I have  an Inverted-L antenna for 80M & 160M and would like to make or buy 
a  remote matching system that would work on both ends of both bands that 
would  accept full power.
I built a system many years ago from a Doug DeMaw, W1FB,  article in the 
May 1985 issue of QST but it has never worked as well as I  wanted for 
whatever reason.
If anyone is interested, this article can be  found at the ARRL QST 
archives  http://www.arrl.org/arrl-periodicals-archive-search  by entering W1FB ,  
1985, May, QST.

Anyone have an idea of a matching system that would do  all of the above  ?
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