Towertalk
[Top] [All Lists]

Re: [TowerTalk] Array Stacking for vertical patterns

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Array Stacking for vertical patterns
From: HankP <pfizenmayer@q.com>
Date: Thu, 11 Aug 2016 16:43:51 -0400 (EDT)
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>

I suspect the super station guys have already seen these and or considered it 
but here tis. 
I am no longer an IEEE member and do not have the IEEE papers. Brueckmann was 
also 
the father of the big fat fiberglas center fed vertical you saw on all the 
military VHF 30-76 mhz 
stuff for years (maybe even yet today - they look much the same) We reduced 
that to practice 
at AVCO , Evendale ,O. I knew I was getting damn old when I saw one of the 
earliest versions 
we did mounted on a Jeep in a Military Museum in about 1985 ! . 

Here is a link to a paper on an HF array scanning in elevation. 

tf.nist.gov/general/pdf/1605.pdf 

I have always kind of wondered if a version of this sort of thing would not be 
better than stacked yagis 
since signal strength variations versus vertical angle of arraival seems to 
often be much greater than 
the yagi gains . 

And another array called ISCAN which I did the individual elements to their 
specs but had nothing 
to do with design and execution of the full array while at AVCO in late 50s and 
early 1960s. 

My recollection was it generated 24 vertical elevation patterns - and the array 
was a sparse matrix of 
center fed verticals about a mile long in a salt marsh up east Md as I recall - 
and they had a hell of 
a time with wild hogs tearing up the 75 ohm foamflex feeders . 

I did get to watch videos of it in action once and it was amazing to watch 
signals from Germany on 
freqs close to 20 meters and see optimum angle of arrival change in 200 
milliseconds in mid day . 


Hank K7HP 


HF propagation test of ISCAN 


H. Brueckmann ; R. Silberstein 
IEEE Transactions on Antennas and Propagation 
Year: 1963 , Volume: 11 , Issue: 4 
Page s : 454 - 458 , DOI: 10.1109/TAP.1963.1138068 
IEEE Journals & Magazines 

    • Abstract 
    • (464 Kb) 
    • 

ISCAN - Inertialess steerable communication antenna 


H. Brueckmann ; J. Gruber ; C. Bramble 1958 IRE International Convention Record 
Year: 1962 , Volume: 10 
Page s : 152 - 163 , DOI: 10.1109/IRECON.1962.1147021 
Cited by: Papers (4) IEEE Conference Publications 




















_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
<Prev in Thread] Current Thread [Next in Thread>
  • Re: [TowerTalk] Array Stacking for vertical patterns, HankP <=