A local ham radio group I occasionally attend events with recently had a very good antenna presentation with well known antenna inventor Edison Fong which inspired one member of the group to go looking for more information on antenna theory.
During that search, Brad uncovered three wonderful videos created by the Film Board of Canada for the Royal Canadian Air Force.
If you are looking for detailed information on how waves travel and radiate in antennas and how shapes affect direction and bandwidth of antenna propagation, check them out!