[obviuosly]

Am I overlooking something or is the "cantenna" not considered a fundamental antenna type? It does not seem to be listed in the page about different antennta types.

It seems to be quite easy to build once you find a suitable can (easier than a Yagi-Uda antenna) and it seems it can easily keep pace with a Yagi-Uda antenna of similar size.

[tyingq]

It would be a waveguide antenna. He shows a slotted one on the page you're talking about.