Electical tilt

the signal is fed with different phases and different weights to each dipole in the antenna.

it totally depends on the antenna vendor. the basic idea is to implement independent phase shifters along the waveguides.
sometimes, it will simply be a plastic device that will slow down the waves depending on how deep it goes into the wave guide. Oppositely, the phase shift will be removed if the device is put further away from the wave guide.

Controlling those phase shifters is done thanks to a screw at the bottom of the antenna. (the electrical tilt is mechanically adjusted :)) )

it’s a kind of cable that can conduct electromagnetic waves, instead of electrical current.

jumper and feeders are waveguides, you know… they do not carry electric current, but EM waves 🙂

johan,

remote electrical tilt (RET) ? it is a remote mechanical adjustment of the electrical tilt… it is of course better than doing it manually, because you don’t have to go on site !!

but otherwise, in terms of precision, the RET is very precise, possibly more than manual 🙂