The PREDator-Portable Resonant Elevated Directional Antenna
Here's an interesting HF vertical antenna for those with limited space for antennas.
Simon (VA7BIX) does a good job of explaining the theoretical and practical aspects of this intriguing antenna. This antenna can be used for both home and filed operations.
If you can't see the video, please insert this title URL into your browser search box: (2) The PREDator - Portable Resonant Elevated Directional! - YouTube
Here are some comments from Simon (VA7BIX):