Russian force in Ukraine deploy Silok radio-jammers in order to disrupt the radio links between Ukrainian drone and their operators.
But the Ukrainians have knocked out several Siloks. With drones. Most recently, a Mavic quadcopter from Ukraine’s Aerobomber unit bombed, with grenades, a tripod-mounted Silok—apparently destroying it.
Add the drone raids on Silok counter-drone systems to the long, and lengthening, list of ironic operations by Ukrainian forces. Ukrainian artillery blasting a Russian counter-artillery radar. A Ukrainian GPS-guided bomb blowing up a Russian GPS-jammer. And many, many examples of Ukrainian drones bombing Russian drone-jammers.
do you have any idea how big antenna array has to be for it to have any angular resolution
Nope
you need something like square array sized at about 2 wavelengths wide, this can easily get into 50x50cm range at lower frequencies