PLA AEW&C, SIGINT, EW and MPA thread

taxiya

Brigadier
Registered Member
The thing about the E-2D's SPY-9 is that it it an UHF band radar, which naturally has counter-stealth capability.

I believe the KJ-2000 has an L-band AESA, which also would give it a bit counter-stealth, but China definitely needs to move to meter-band AESA for their AWACS (also because the KJ-2000 was defeated by the J-20 during Red Sword excercise, if we believe the rumors).
UHF is ITU designation, it is from 300
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to 3
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. L band is IEEE designation of 1 to 2 GHz, S (IEEE) band is 2 to 4 GHz. So L band is within UHF, while S is half UHF.
Do we have SPY-9's operation frequency range? To call SPY-9 a meter wave radar, the frequency has to be around the lowest range of UHF which is 300MHz.
 

Hendrik_2000

Lieutenant General
From Henri K this UAV with conformal radar will revolutionized AWAC. This particular radar is optimized for surveillance of naval target interesting. Add folding wing and stronger structure, short take off it will solve lack of AWAC for Liaoning
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JY-300: CETC flies AEW drone to compliant radar
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BY
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In July 2013, when WANG Xiao Mo (王小 谟) was interviewed by the People's Daily reporters on the question of what it could be the Chinese AWACS of tomorrow, this Radar Academician, recognized as "the father of the system in China, imagined
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. Five years later, it is on a MALE drone that the CETC group, where WANG holds the position of Deputy Director of the Commission for Science and Technology, begins to implement these ideas.

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According to a statement from Institute 38 of this Chinese electronics group, the drone Tian Shao (天 哨 in Chinese, which means Sentinel of the Sky) recently managed its first 30-minute flight at Pucheng Neifu Airport in the province. from Shaanxi. The text gives little details as the Chinese custom wants, but the chosen vocabularies still give some interesting clues about the nature of the craft.

For example, the exact word for the drone is "sensored flying machine", and the Institute 38 also emphasizes that the design of the machine and radar payloads is highly integrated. If this "integrated design" can seem confused at first, the reading of several patents filed in 2016 by this consulting firm specializing in the design of fighter and AWACS radars, like that of the KJ-500, clearly allows to put in connection with this term and the use of conforming radar antennas.

In one of the patents that refers to an electronic scanning system on a "sensor flying machine", AESA radar antennas are installed on the leading and trailing edges of the wing, with an arrow angle carefully chosen to cover the whole area.

At the end of 2017, another patent involving a matrix of active electronic scanning antenna on a drone was submitted, with a level of detail sufficient to suggest that the technologies would be at the industrial stage.
 
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Hendrik_2000

Lieutenant General
(cont)

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Excerpts of two patents filed by CETC 38th on the application of drone compliant radars (Image: CETC 38th)

Note that the drone Tian Shao could actually be the JY-300, an "AEW system without a pilot", presented in the month of June by the same institution at the Radar Show in Nanking.

If this is the case, it will be a 1,300-kg take-off UAV with a carrying capacity of 400 kg, capable of flying at a maximum speed of more than 200 km / h and a ceiling of 7 500 meters. The autonomy of the machine is greater than or equal to 15 hours.

According to the description provided by its manufacturer, the JY-300 is designed for the surveillance of naval targets such as ships, aircraft and anti-ship missiles, but there is no indication today that it act of an embedded drone as claims some Chinese media. It seems to be delicate in all cases given the size of the aircraft, 17 meters according to a source close to the backrest, and without the mechanism to fold the wings.


Apart from the performance of the vector itself, one can also observe on the model and also in the manufacturer brochure the locations where the compliant antennas are installed. The images show that they are on both sides of the cell, on the leading edges of the wing and possibly towards the fins.

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Yellow bands indicate locations for radar antennas on the JY-300

Given the images released so far, it is difficult to say if the drone Tian Shao is already equipped with radar compliant at this stage, but any logic should first validate the characteristics in flight of the craft before the party embedded is not installed and tested in turn.

Also remember that CETC is not a specialized entity in aeronautical design, unlike AVIC, so it is not surprising that the platform itself is developed in collaboration with a third party, but this remains to be confirmed.

The satellite images taken on October 1 at Pucheng Neifu Airport, the day after the first flight of Tian Shao , show that the drone and its support teams have already left. Other flight tests are probably necessary for the rest of the program, we will have the opportunity to return to the subject soon.

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Pucheng airport where the drone Tian Shao made its first flight. Image dated 1st October 2018.

To be continued.

Henri K.
 

by78

General
KJ-500 arriving at Zhuhai... All images are high-resolution.

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gelgoog

Brigadier
Registered Member
This could be either some form of counter-stealth radar or just a way to increase the radar coverage area of the drone.
With multiple radars at different angles you get multiple return signals and can use that to get a better result.
 
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