This is my starting picture for Air Warden, a conjectural, near future, air defense killbot.
All components of the air defense system reside in a turret designed to mate with a common, two meter turret ring. The carrier for the turret can be a tracked, wheeled, or walking vehicle, all equipped with the exact same, two meter turret ring and 1.5 meter turret basket depression. The chassis houses the primary control computer for the killbot. The turret contains a secondary control computer that performs all air defense functions at the command of the primary computer.
This very rough sketch shows all major components of the planned machine including two possible carriers. It very much resembles tracked air defense systems developed during the 1970s and 1980s with directed energy weapons in place of rotary cannons. The machine will include active and passive detectors as well as a secondary counter drone defense system.
Why does a machine designed to shoot down aircraft need a separate system to shoot down drones? The smaller, counter drone system enables the machine to engage two targets at once from opposite sides as a defense against drone swarms. A platoon of these machines, networked together, can very quickly clear a very large battle space of aerial threats.
All necessary technology required to build a machine such as the one just described currently exists. Some problems remain to be solved, but the fundamental technology is sound. In essence, this is a proposal for an experimental military drone, not a work of alternate history or science fiction. However, I believe it resides within the mandate of this campaign.
The long wheeled thing at the bottom of the drawing is a drone mine clearing worm. While an interesting idea, it is probably not feasible and not part of this project.
As a reminder, in Damraska Speak, a killbot is a fully automated, mobile, weapon carrying combat machine authorized to make human lethal engagement decisions on the battlefield. They are very scary. As a species, we should not build them. It is an absolute certainty we will build them in great quantities.