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[email protected] · October 15th 14, 07:02 PM posted to rec.radio.amateur.antenna

Lostgallifreyan wrote:
wrote in :

Except that a circle has a constant radius and a catenary has a constantly
changing radius.

If you can do a parabola that could be close enough. Not the same as a
catenary but a damn sight closer than a circle's arc, and much more likely a
form for a tool specialising in projecting energy to be able to do.

I just don't see the issue with a catenary.

The equation for a catenary is y = a * cosh (x / a).

All spreadsheets have a hyperbolic cosine function and can produce graphs.

Back in ye olden days we would use a math table and graph paper to plot
the function then use a ruler to get a straight line approximation.

--
Jim Pennino

Lostgallifreyan · October 15th 14, 07:24 PM posted to rec.radio.amateur.antenna

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