Radar innovation before and during the Second World War

Did radar demonstrate that short-lead technologies could innovate dramatically during wartime?

Partly, but much of radar's development predated the war; wartime acceleration also depended on mass production and a resilient Allied industrial base.

Shipboard air-warning radar was already entering service before the Second World War, so the conflict did not create the technology from nothing. Britain's immediate problem was capacity: Chain Home, airborne radar, naval sets, and continuing improvements all competed for limited production. The United States used its extra time before entering the war to build factories capable of mass-producing systems whose value had already become clear. Britain also established production in Canada, where access to American machine-tool suppliers could support wartime output. That wider industrial network mattered because bombing, heavy use, and ordinary wear could disable the specialized machinery needed to make radar and other equipment.