Chinese Radar Developments - KLJ series and others

Hendrik_2000 said:

Not sure how reliable is this or if it has any application in enhancing the AESA radar capability Via Asoka from Pak Def

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Chinese scientists have made major breakthrough in semiconductor material for AESA radars that will increase the effective power output by whooping 1000 times, and sensitivity by 6000 times.

This material could increase the effective detection range of current AESA by 50 times, with the same size and same number of T/R elements.

This means if F-22's RCS is 0.0001m2, it could be detected 576km away. This may be the end of the Stealth Technology as we know it. Note, you can't decrease the RCS indefinitely, because it gets harder and harder after a while.

Here is the google translation

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Modern combat is based on the electronic technology based on the war, who has the advantage of electronic equipment can seize the system of electromagnetic power, and then win the battlefield information dominance.

In the case of unidirectional transparency to attack the enemy, the performance of electronic equipment and materials are closely related, such as F-16 and F-22 are using active phased array radar, but the material is completely different, the performance of a huge difference

The material referred to here is mainly semiconductor materials, measuring the main indicators of semiconductor material power / mass ratio and reaction sensitivity, the former describes the quality of a device under a certain amount of power, which describes the device working state transition and small signal detection capability

And China's recent achievements in this area is likely to be a significant increase in radar performance. US F-22 Airborne Radar AN / APG-77 uses gallium nitride as the base material for semiconductors with an electron transfer rate and mass power ratio of about 5 to 10 times higher than that of conventional gallium arsenide radar.

This means that in the same radar with the different performance of the case, the opponent can be more than 1.5 times the distance detection target, which will inevitably bring great tactical advantages.

Although China has successful manufacture gallium nitride crystal,There is a gap between the material, which let our army aircraft, ships at disadvantage in competition for the implementation of the electromagnetic system

Professor Xu Yuxi published a paper entitled "Interface solution synthesis of semiconductor two-dimensional polymer," the paper is very noteworthy, marking our country already has the ability to prepare two-dimensional semiconductor materials in the laboratory, the power of this material will be large Increase the performance of electronic equipment.

The so-called two-dimensional semiconductor is relative to the three-dimensional semiconductors, this semiconductor is very thin, in the thickness of only one atomic composition, and block-like three-dimensional semiconductors, such electrons within the electron transfer rate is very fast.

This is because, subject to the three-dimensional space environment, after the application of voltage, the semiconductor within the electronic part of the movement will be along all direction, but the electron will be flying in three-dimensional space, most of the exercise energy is consumed.

In a two-dimensional semiconductor, electrons can not move to the third dimension, which will greatly increase the current. How much does this increase in performance?

National Nano Science Center paper gives the conclusion that the power quality ratio of 1000 times! Response sensitivity exceeds 6000 times! What does that mean? I'll give you an account.

Radar detection distance is proportional to the power and sensitivity of the fourth power, in the use of the material, the same weight of the radar will be able to achieve 50 times the existing radar! F-22, for example, the RCS minimum of 0.0001 square meters, can reduce the existing radar on the normal fighter detection distance of 13 times, one can detect 150 km airborne radar, only 10 km near the discovery of F

But when the radar uses a two-dimensional semiconductor material, it can be found in 576km F-22, taking into account the current stealth aircraft stealth capability has been almost to the limit, in particular, it is difficult to reduce the minimum, it can be said that once the species

The radar put into production, stealth aircraft myth can no longer reproduce. In addition, it should be noted that this new material has a soft, plastic and strong advantages, under the influence of this feature, can be attached to the surface of the aircraft conformal radar antenna array has become a reality.

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Figaro said:

@Asoka is the guy who claims that the J-20 is currently fitted with 3D thrust vectoring and 210 kN thrust WS-15. He also claims that the WS-15 uses AL-31F nozzles to deliberately conceal WS-15. After these claims, I'm not sure if he's that credible anymore ...

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