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From
"Broadband radial discone antenna:
Design, application and measurements":

https://arxiv.org/abs/physics/0612043
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-A-
Standing wave ratio
against frequency or ratio of total length to wavelength
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-B-
Some of the 2-pieces - Disc-and-Cone - Experimental Models
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-C-
More?
A prototype Skeleton Discone for 3G and GSM

-Valid on 26 April 2007-
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