,,,,from zero13wireless.net...!!! Here it is the measurements of the a box-can with a horn that can put it together:
Vibrator=65 mm diameter core placed 8.5 mm above reflector (bottom of box-can)
Director1 =58 mm diameter, placed 2.2 mm above the vibrator
Director2 = 38 mm of diameter, placed to 65 mm on the reflector (bottom of the box-can)
Director3 =70 mm diameter, placed 137 mm above the reflector (bottom of the box-can)
All the elements traversed by rod of 3 mm of diameter including the reflector.
Horn Measurements:
Base opening 190 mm (equal to container width)
Horn opening 307 mm
Perpendicular height of 95 mm
The simulation is made of 0.5 mm thick copper.