The shield generator is carried by a Rebel infantryman, powered up in the middle of battle, and used to protect several Rebel infantrymen from AT-ST fire. Does such a device have a predecessor from the Clone Wars era?
Similar (but generally much larger) area shield generators already exist in canon. For example, the Gungan shield generator seen in Episode I:
The area shield seen at the Battle of Christophsis:
The area shield protecting the Ray Shield Fortress:
However, none of these previously known area shields are man-portable (the Gungan shield generator comes closest, but is carried by a pair of fambaa war beasts).
(The Gungans do have a personal energy shield which is of course man-portable, but this shield does not protect an area -- it doesn't even fully protect one infantryman -- so such a shield isn't really a predecessor of the shield generator seen in Star Wars Battlefront.)
It seems odd that there doesn't seem to be any device from the Clone Wars era similar to the one seen in the trailer, despite the fact that similar (but larger) shield generators as well as smaller personal shields were in use by the Gungans well before the Clone Wars. I would think that the Republic would want to use shields like the one in the trailer to help protect their valuable and expensive clones, and perhaps even the Separatists would want to use them to protect their relatively expensive super battle droids.
To be clear on criteria, I'm looking for a shield generator that is
- Man-portable (stationary shields and/or shields that require large animals to carry them don't count)
- Able to cover an area large enough to protect at least two human-sized infantrymen (i.e. personal shields like the Gungans' don't count).
- Used for blocking blaster bolts, whether from small arms or vehicles like an AT-ST
- From the Clone Wars era