the imax exposed article fails to take the slowing effect of the radome into account so who knows what it is electrically, solarcon say its a .625wave, it would be the first time a cb antenna manufacturer created an advantage and kept it a secret, its usually the other way round,
look again at the rf current plot at 90 degrees, compare it to sirio's depiction of the rf currents in the upper 1/2wave of the 5/8wave antenna,
the gainmaster shows a dip in the center and current maxima some point away from the centre unlike a regular dipole but shows a dipole like pattern which according to what i have read it should have,
sirio claim the effective radiator is 6.9mtrs between the choke that defines the end of the lower leg and the tip with near uniform dipole like radiation along that length, if its just a 1/2wave dipole they are been very deceptive,
it looks to me like a .625wave dipole as claimed with a parallel none radiating matching stub placed the right distance from the feedpoint to cancel the reflection from the higher than 50ohm feedpoint impedance of a .625wave dipole,
i have no idea if that setup will outperform a 1/2wave dipole,
my tutors never sounded like this, they had beards and a pipe
YouTube - ECE3300 Lecture 13b-8 Impedance Matching stub match parallel
