"John Smith" wrote
A half wave DLM is one which consists of a 1/2 wavelength radiator ...
google it; or, Vincents patent contains VERY complete data on the
construction of one--he tested it, also, at the Navy complex.
later...
A half wave DLM is one which consists of a 1/2 ELECTRICAL wavelength
radiator ...
________

I just looked at that patent, and saw nothing about that. I did see many
references to the need for a good r-f ground for the DLM.

As a variation, the patent describes putting two DLMs back to back to create
a dipole. Of course, that form is no longer a DLM, it is a loaded dipole.

Can you refer me to the page(s) of that patent that describe(s) what you are
writing about?

RF