I think I should give an explanation.
The name “Cantenna” is used for 3 entirely different products as detailed below.
(1) The Name “Cantenna” was first used for Heathkit’s classic oil-filled dummy load resistor produced from 1961 through to 1983
(2) The name “Cantenna” is being used since 1980s by Amateur Radio (HAM) enthusiasts for a monopole inside a wave-guide made of Pringles can. The Pringles can beamed entire power in one direction, making it highly directional antenna. It worked like the reflector of a flash light, which creates a beam of light in one direction.
Subsequently this wave-guide directional Cantenna was adopted by WiFi enthusiasts using many different types of cans.
https://c1.staticflickr.com/3/2817/33386508654_930f1b1b94_n.jpg . https://c1.staticflickr.com/3/2914/34228285895_1315814373_n.jpg
(3) In 2014, without being aware that this name is already in use by two other different products, I gave the name “Cantena” to the adsb-antenna I made from soda can (Click Here).
The story of soda can adsb cantenna goes as follows:
In 2014, I made and put on trial run the old-timer coaxial antenna (also known as sleeve dipole). The original design had a narrow copper pipe/tube slightly bigger in dia than the dia. of feed coax. It performed inferior to other dipole / monopole designs.
I concluded that main reason of its inferior performance is the very narrow air gap between feed coax and copper pipe/tube, and decided to try a large dia version using drink can with lot of air gap between it and feed coax. When I put this wide-bodied design on trial run, it performed very well. This was the birth of adsb-Cantenna.
Initially I introduced it with its generic name “1/2 λ sleeve dipole” (Click Here).
Two months later, without being aware that the name “Cantenna” already exists and is already in use by two different products, I coined for it a simpler and meaningful name “Cantenna” (Click Here).
I came to know about about name Cantenna’s earlier use almost a year later.
Adsb Cantenna is a hybrid of:
“1/4 wavelength ground plane antenna”
AND
“coaxial antenna” (also known as sleeved dipole)
