Driving by some weigh stations I have noticed antenna's on a tower that look like a wire umbrella, Florida, and Louisiana is where I have seen these. what type of anntenna are these, and is there a formula to build one?
not sure if they are a type of discone, but there is a huge one in Nagoya Japan. If you find out what they are, let me know ;)
STILL researching this! I have found a similar design but inverted. Hexbeam antenna.