I doubt they would disclose how exactly they did it, but Iran receiving an electronic warfare equipment not 6 weeks ago and then this drone miraculously falling into their hands undamaged - it is reasonable to assume there is correlation. Or perhaps they shot it down, made a replica and tried convincing the US that they could land their drones at will. However, I think it is highly unlikely that the drone just "malfunctioned", and in a way that allowed it to be captured in perfect condition.

In any case, http://www.google.ca/search?q=avtobaza+iran

> stealth-penetrating radar

You might want to look up an incident in Serbia where the stealth jet was in fact downed that way (a bit more complicated that just a radar, but it was still tracked along the sky from the ground through electronic means).