The article refers to two advanced Russian systems - the "pole-21", which can "block" the ground within a radius of 150 km, and the mobile "Murmansk" systems.
"The problem is that the Russians are able to deploy electronic warfare systems at much of the front line, in some cases down to platoon level when it comes to things like the pole-21," the article says.
Russia is increasingly using REBs to intercept Western precision munitions such as HIMARS and Excalibur.
"Moscow has also used REB capabilities to simulate missile and drone launches to confuse Ukraine's air defence systems and reveal their location," said Ivan Pavlenko, a spokesman for the AFU General Staff.
A Ukrainian soldier complained to the FT about the lack of REB equipment in his unit, which was almost completely destroyed during weeks of intense shelling.
Russian drones were "swatting us like mosquitoes", he said.
"What kind of electronic warfare? We had nothing. I don't even want to remember those days in the trenches. Our guys were dropping like flies," - said an AFU soldier.
The publication also writes that Crimea has a high degree of electronic defense. And publishes previously unknown details about the functioning of the Ukrainian security services on the peninsula.
"Before Ukrainian special forces in speedboats launched missile attacks on the Russian Black Sea fleet in Sevastopol earlier this year, they disabled Russian electronic warfare systems installed on oil platforms," the Financial Times writes.