China has tried to import Russian AESA radar but failed. They can design AESA radar (thanks to Ukraine and Russia as well as Isaerl) for large ships, AWACS, but the design of miniature circuit AESA radar standard GaN MMICs (in the military) China not likely. I know fanboy china will take a few examples in the civilian sector as Ka-band MMIC nitride semiconductor (or can be copied)
http://www.semiconductor-today.com/features/PDF/SemiconductorToday_SeptOct_KaBandNMMIC.pdf. But most AESA radar is located at L-band frequencies (N050) and X-band (APG-77). Another example of Chinese supercomputer but they use Intel Xeon chip, radar N050 using chip 2S + Elbrus, APG-77 radar used i960MX chip. Any names or prototype chip of AESA radar KLJ-5 (J-20) !!
China to buy 5,000 Russian air-to-air missiles
Since China's domestic air-to-air missiles such as the PL-12, the SD-10A and the PL-9C were designed based on technology from Ukraine and are still unable to compete against US counterparts, the People's Liberation Army realizes that it needs the more advanced Russian missiles to go head to head against the US and Japan in any potential future air combat, Roku wrote. He said China has already bought 1,500 R-77 missiles and 3,300 R-73 missiles from Russia.
China to buy 5,000 Russian air-to-air missiles: Japanese report|Politics|News|WantChinaTimes.com
Russia won't sell China radar system for J-20 stealth jet
Russia has rejected the idea of providing China with a radar system suitable for fifth-generation stealth fighters like the Chengdu J-20, according to Kanwa Defense Review, a Chinese-language military magazine published in Canada.
Russia won't sell China radar system for J-20 stealth jet: Kanwa|Politics|News|WantChinaTimes.com
Mikron products are sold to South-Eastern Asia. The main export countries are China, Taiwan and Hong Kong.
JSC Mikron: Private Company Information - Businessweek
Cryptography Research and Mikron JSC Sign Patent License Agreement for DPA Countermeasures - Bloomberg
Another proof, the Chinese do not have the ability to design the semiconductor, IC best small (micro), they can copy the shape but quality very poor. The most obvious example, China has a lot of SAMs and A2A however with 5 missiles shared a homing seeker head AMR-1 include: PL-10/11/12, HQ-61C, TY-60 has shown the ability to fabricate miniature electronic components in China is very low