[NLRS] Stacking distances for loopers

[Dr. Gerald N. Johnson]

On Thu, 2007-05-24 at 21:05 -0500, Mike King - KM0T wrote:
> 
> Glen, good questions.  I too asked the same thing many times.  How much does 
> it matter?  It depends :)
> 
> If you have not seen it, check out this link on my website...shows stacking 
> distances of loopers and diagrams of the rough apertures.
> 
> http://www.km0t.com/pages/june2001.htm
> 
> I decided to minimize aperture interaction with other antennas on my tower 
> as well as the roof of N0DQSs rover roof.  There are diagrams of both.  Some 
> are a bit compromised on the tower, but years of operation has indicated 
> that they work pretty well.
> 
> I think if you get them too close, you know they will give reduced gain as 
> the patterns will be messed up.  How much, well that would have to be done 
> on the antenna range while installed in the real world application, unless 
> you have the antennas modeled for one of those antenna programs.

Loopers are the hardest to model because the models only like right
angles or straight connection between segments. They don't do will with
circles. They may give numbers but slight changes in the numbers of
segments or their positions gives wild variations in results.
> 
> Sorry, but not much concrete help, I just know that Gene's antennas on the 
> roof of his rover work extremely well on all bands.
> 
> 73 and GL
> 
> Mike - KM0T
> 
73, Jerry, K0CQ