Now I'm confused your answer raises two questions.....
Scenario1 - Cone is semi transparent - it implies that nosecone (Radome) attenuates out going transmission/ reflection and incoming reflected signals from other aircraft/ object or incoming EM transmission from other aircraft/ land based radar.
It’s an ideal situation to avoid detection as J20 nosecone will be very effective to attenuate/ absorb in coming signal to avoid detection. But ..
It will do bad to it's own detection range as it will also attenuate out going transmission from its own radar and incoming reflected signals from other object. In layman's term it will impact J20's ability to effectively locate, track and engage targets at long ranges. It defies the whole idea of gen 5 aircrafts to locate targets at ranges without detected by others.
Scenario 2 - EM Transparent material..
There will be no attenuation for transmission from it’s own radar and no attenuation on reflected signals. SO it will be very good at detecting targets at range.
But, Transparent nosecone will expose it’s own radar (flat metal plate at least 1mtr dia) and other equipments on board beside radar and will result in lot reflection and will be easy to get detected. If detected at range it’s not gen-5 aircraft.
Please clarify how does J20 engineers strike a balance to get good LO and long search n track range.