I am compelled to address a bit of nonsense in that article...
In the latest of multiple breakthroughs in the development of indigenous air defence systems Iran has reportedly developed a system capable of detecting
militarywatchmagazine.com
Regarding the capabilities of the new system, the Head of Iran Electronics Industries (IEI) Brigadier General Amir Rastegari stated to this effect in an interview with local media:
"We have the fingerprints of the enemy’s electronic equipment. Just as fingerprints are unique to humans, this is also the case in regard to electromagnetic systems, and we have achieved the technology [to detect them] for several years... For example, if the radar of an F-35 fighter begins operations and surveillance, it emits radar waves which are different from those of another’s F-35’s radar waves. Today, we are capable of recognising them, that is, we can receive and analyse the telecommunication, radio and magnetic signals and find out the warplane they belong to. If the same fighter jet starts operating later, we will immediately find out about it.”
Regarding the highlighted, technically speaking, that is true. No piece of electronics is identical to each other in manufacturing and operation. But what the general said is outright misleading, to say it kindly.
The electronics of any platform, be it a tank or airplane or ship or space based, is
NOT UNITARY. Technically speaking, changing a component inside a system changed its EM signature. For what the general said, there are two main components of the F-35's radar system: antenna and computer.
So if an F-35 has its antenna changed, how would whatever fantastical air defense system know it is literally the same F-35 distinguished from hundreds of other F-35s?
What if the radar system's software was modified to transmit a different mode for a different air operation?
What if the entire radar system was modified to be installed into another platform such as the F-15?