I have an upcoming 90 minute transfer into / out of Terminal 1 at DXB. No change of terminal required.

Are arrivals kept separate and require re-clearing security (coming in from Germany if that helps) before heading to the departure lounge / gates? Or, is it a bit like Schengen arrivals in the EU where you end up directly in the departures area?

I've not transited through Terminal 1 so I'm not sure what to expect. It looks like I'll be arriving / departing at the D gates.