On Tue, 16 Aug 2011 11:14:24 +0200, Helmut Wabnig [email protected] ---
-.dotat wrote:

The SteppIr does vary the elements, if I understand it correctly?
For practical reasons they do not change element positions on
the boom but sufficiently adapt to each frequency band.

Perhaps reading the Steppir patent might be illuminating:
http://www.google.com/patents?id=rw6xAAAAEBAJ
Note that the elements do not change position, only their length.
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Jeff Liebermann
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