I haven't seen anyone say this yet, but:
DO NOT USE THE SECONDARY FIRE OF THE REPEATER
This is because the shields will only go down for about 5
seconds. NOT ENOUGH. (for me anyway)
Use the fast saber style and with about 5 hits (you'll probably get thrown back a few times) shields are down for about
Also if you use the repeater you may aswell use detonators, rocket launchers, anything explosive, BUT you WILL get hurt as it's a little hard to open the distance.
Note: I did this on normal difficulty and also I never managed to get the antenna down.
thankyou for reading,