On a more serious note ,we can say that Sukhoi ,with the domestic
SU-35S, has aimed very high (being capable to counter western "fifth generation" aircraft).
The analysis of the amount of work already performed allows a conclusion that Su-35/Su-35S has a much better flight and technical characteristics compared to the analogue aircraft in service, and the installed onboard equipment allows it to solve a wider range of tasks defined by the tactical and technical mission. The potential characteristics incorporated in the aircraft will enable it to exceed all tactical fighters of the generation 4 and 4 + (Rafale and EF 2000 type, upgraded fighter jets such as F-15, F-16, F-18 and Mirage 2000), and to counteract the F-22A, as well as F-35A tactical fighter.
At today the production rate is mantained at a lower level pace to wait for the test's completion and system validation of some ancillary optronic and DAS avionic components.
AESA does offer pretty significant advantages over the PESA: very low levels of receiver noise, you can control amplitude and phase for individual elements, and you can simultaneously transmit different beams of different frequency by basically dividing your array into different segments
SOM ,as you well know , this technique has as consequence two important drawbacks : a significative dilution of angular azimuth and elevation reliability on aperiodic scan cycles and a substantial reduction of the overall tracking range.
LPI is ,obviously a very relative
capability the efficiency of which is defined by the overall level and ,even more, the architecture of the enemy RWR systems ; it had a strong value in the early years of its introduction ,when "LPI" radars could exploit an initial technological surprise and the presence in majority of likely opposing Air Forces of outdated ,often export versions, of old RWR designs .
Naturally this initial technological "momentum" had progressively vanished in the last years and at today (taking into consideration only the most up to date systems and techiques) we can say that the traditional dynamic equilibrium between radar and RWR has been restablished.
In any instance SOM ,in English, exist a good book on the subject which i have read some years ago in its first edition (even if with some sections and computations obviously and voluntarily a bit "warped"
) called : "Detecting and Classifying Low Probability of Intercept Radar" by Phillip E. Pace , by today should be published a second edition of this same book.