Total posts : 45366
The due diligence has been done. It works. His information on the website shows that at 62 feet high, the AM broadcast antenna is equal in gain to a 1/4 wave tower w/radials. Go higher, and it exceeds that of the tower.
BTW, the author and inventor is NOT suggesting these antennas are the be all and end all, rather, that they have a specific purpose, where you get MUCH higher gain than otherwise possible from a physically small antenna.
I build my own 5 ghz slotted waveguide antennas, and never cease to be utterly amazed at thier gain. a 1 by 2 inch stick of aluminum tube under 2 feet long, and it has higher gain than a sizeable grid dish.
His discussion of how and why it works makes sense to me. Oh, and being close to ground losing “gain” also makes sense, just read how the antenna pattern changes.
Still, one of these sitting 20 feet up would absolutely blow away the 10 foot anything else.
The question is whether the FCC would balk at the phase shift inductors necessary to make the antenna work. I would like to see a good rf guru’s comments on how to build the phase shift in a physically compact space.