(1) I coined and used term Cantenna independently and without being aware of its previous uses. This re use has been done by waveguide antenna designer also as he also seems to be unaware of its use by dummy load. You mentioned the name cantenna was already in use by a dummy load device as far back as 1961, hence the objection you have made for my use of name cantenna, also applies to use of name cantenna by waveguide antenna.
(2) As far as “coaxial antenna” is concerened, I have already acknowleged its existance and closenes to cantenna in my post on page #1, and again quote it here:
A close relative of Cantenna, the “Coaxial Dipole” has also existed for a long time, but was not so popular as the Spider. It was mainly used in rubber ducky antennas of Hand-held radios. It has a very narrow diameter sleeve, which was made of a copper tube or pipe, slightly bigger in diameter than coax. It did not have the performance as good as it’s newly discovered wide-bodied relative, the Cantenna.
To clarify the difference between Cantenna & Coaxial antenna, I am attaching two images showing the construction of “Coaxial Antenna” using a narrow dia cage/tube/pipe, slightly bigger in diameter than the diameter of coax.
First image is from antenna engineering book “Antennenbuch by Karl Rothammel”, and the second image is from patent by A. BAILEY (US patent US2184729)
Image 1 of 2 (Translation in English in red added by me)
Image 2 of 2