Chinese Radar Developments - KLJ series and others

[Hyperwarp]

I***

Right, I realized that I was thinking of the F-35 while talking about the F-22. The F-35 does have some internal munitions that can attack radar installations, including JSOW and JDAM-ER, and external munitions that can do so at very long range like the JASSM and JASSM-ER if it wants to accept an RCS penalty, which could conceivably still leave it outside a radar's detection range at a maximum launch range of either 370km or 925+km for the ER version.

If the US wanted to take-out PRC's OTH Radars they won't need the F-22 or F-35. They'll just fire 100s of Air/ship/sub launched cruise missiles. I mean even the good old AGM-86 and BGM-109 have ranges easily exceeding 1500 km. Actual ranges are classified but even the official range is at least 1500 km. The USAF bombers won't have any SAM threats at those ranges and the USN can stay outside the ASCM and ASBM ranges.

 

[Deino]

Guys??? are we still in the topic?

 

[Hyperwarp]

Guys??? are we still in the topic?

Ok, to get back on topic, anyone has any new info on the gigantic JL3D-91B radar?

We have now seen the YLC-8B, JY-27A, but little on the JL3D-91B

 

[kyuryu]

Sorry, but what do OTH radar configurations have to with Chinese KLJ series airborne radars?

 

[Deino]

Sorry, but what do OTH radar configurations have to with Chinese KLJ series airborne radars?

Nothing ... but bthe topic is "Chinese Radar Developments - KLJ series and others".

But I agree with you this discussion and the latest post fit better into the Aerial Defence Radar topic (if such one exists?).

Deino

 

[Tam]

There is an Anti Stealth Radar thread title right there even next to this as I type.

 

[Semi-Lobster]

Has there been any new or confirmed information on the PESA radar used on L-15/JL-10 variants such as those L-15Zs exported to Zambia? They will seen fairly unknown, AFAIK I haven't even seen any source with a name for the system?

 

[Hendrik_2000]

Here is the documentary on doppler pulse radar development and AEW radar I believe I already posted this documentary before Interesting They really start from the scratch The lead designer does not know the principle of pusle doppler He has to first learn it It take him 10 years jsut to learn the basic
Then they tought they get help from Israeli but the patnership was canned and they have to rely on themselves. But a lot of people doubted if China can independently developed the radar without outside help .Eventually they triumphed. The hero is freshly minted Phd name Zhang Liang

 

[Hendrik_2000]

Another documentary of SAR radar development And how they found the lost helicopter in Wenchuan earthquake using SAR radar. Interesting

High resolution SAR picture

 

[Anlsvrthng]

YLC-8B is not fixed like OTH radars -

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. It is towed, and you can deploy multiple these in reasonably close proximity unlike OTH radars that take enormous space. Ranges of OTH radars are much, much greater. During the 1999 boming of Serbia, the the French Nostradamus OTH Radar supposed to have repeatedly detected the B-2 (flying in full stealth mode) at ranges that had supposedly pissed off the Americans in a big way. Same with the Jindalee OTH Radar. Let's just say it is far, far greater than 100 km when in comes to OTH radar for B-2 and F-22.

Regarding the 0.0001 m^2 values; this is probably a ground test value at an RCS test range. You just have to look at how small 0.0001 m^2 is. That is insanely small for the bird the size of the F-22. But in actual flight, even a slight deviation due to what ever reason, even a small control surface movement, will bump the RCS. Plus, what Air-to-Ground munitions does the F-22 have at 110 km to take out the YLC-8B? F-22 does not carry anti-radiantion missiles. JDAM-ER has a range of 80 km IIRC, and I don't think the F-22 can carry them. F-35 on the other hand should be able to.

All stealth airplane designed for X band low detect-ability.
X band has a wavelength of centimetre, and it is usable only for active or semi active missile homing.

To have low detectability in this band they need to decrease as low as possible the number of edges on the airplane, and cover them with RAM in comparable thickness \to the wavelength. All other surface will be dominated by geometric scattering.

So, the S band has a wavelength of 10 cm, and the VHF is meter , means the RAM is useless, the airplane can be considered as a big edge, with smaller (S band) or no (VHF) geometric scattering .

Means the effective radar cross section of an f-22 , even if the x band is as big as a square cm (require extremely costly maintenance procedures) in VHF will be several square meter.

Of course it just solve the detect-ability issue, the SAM missiles still not usable.