Precisely the oposite, quite a number of modern Jets have that capability, and any modern AEW will do precisely what Witcha described.
Its called “Non-Cooperative Target Recognition”.
The first aircraft that fielded an efective NCTR radar mode was the USAF F-15C around 1985, since then it has become a standard.

Decent descriptions here:
http://www.ucl.ac.uk/scs/people/academic-research-staff/herve-borrion/publications/processing-techniques.pdf
http://www.cis.jhu.edu/~sanchez/ENST_memoria_Thales.pdf

For the last time, an Aérospatiale_Alouette will be detected, tracked and destroyed wether its moving or hovering, its irrelevant.
An Helicopter actually presents a lot less dificulty to detect and positively ID than the typical “Technical” that NATO used has target practice in Libia.

wow i have just read about it here
http://www.users.globalnet.co.uk/~dheb/2300/Articles/PG/PGSA.htm

Out of the mid-1970s ‘Musketeer’ program, the idea of using radar to count the fan blades in the contact’s engine (front or back) to identify aircraft was thought possible. This radar signature was unique to each aircraft (sometimes different models of the same aircraft). This technology, known as NCTR (Non Co-operative Target Recognition), had to wait until mid-1980s computer technology caught up. From 1985 USAF F-15C had NCTR modes added. During the 1990-1991 Gulf War, the USAF decided the ROE would be for each fighter requiring two methods of IDing a target. One method was AWACS, the other accepted method was NCTR. F-15C were the only coalition fighters allowed to operate over Iraq, NCTR was one of the reasons. During the next 10 years NCTR was fitted to US F-14, F-16 and F-18s, selected foreign F-15 , UK Tornado F.3 (early-mid 1990s), and French Mirage 2000-5F in the near future

thank for these information 🙂 quite strange for me :p
but does that mean the decoy like ALE-50 or even ITALD , MALD-J actually useless against any aircraft or SAM that have radar able to do NCTR ( cause if they can count the blade that also mean they can actually see the shape of the plane ? right )

Another question that isnot very relevant : why the range of sea-surface search mode of fighter radar is quite short , i used to think that due to the ship moving so slow so it’s harder to find them in the clutter of moving wave , but if the radar can see the shape of the ship then what prevent it from detecting the ship at max range ( i mean ship often have rcs= 10000 m2 – 50000 m2 but in sea-surface search mode fighter can only detected a destroyer at 200-300 km )

it seem that detected slow moving target is a very very hard work for fighter’s radar even the modern one ,
for example the Zhuk-AE on mig-35 can detected an air target with RCS of 5 m2 at 130 km but against a naval target like a destroyer ( rcs about 10000 m2 ) the range is only 200 km
http://defense-update.com/features/du-1-07/aesaradar_zhuk_AE.htm

In case of a Zhuk equipped Ka 52 facing of a say Mig 29 , even if there RCS are the same..the Mig 29 will always have the first shot as its fcs will arrive at a firing solution at a longer distance away because it also takes into account the airspeed and the kinematic range of the missile will be longer than when fired from the helo.

With a good HMD and a HOBS missile the helicopter may have a chance… If it were facing an outdated fighter with bad radar and old WVR missiles.

Normally, it’s no contest. Any modern fighter with an AMRAAM-equivalent missile will have taken out the helicopter long before it even enters targeting rage of those AIM-9s or (for Russian and European helos) Igla/Mistral MANPAD pods.

the problem here is not the range of missile , i know jet fighter can fire missile from much much further than helicopter , however like i have said before , it seem that because jet and air to air missile use doppler radar the helicopter will become invisible when they are hovering ,jet fighter may use something like FLIR pod to find the helicopter but helicopter have a much lower IR signature , not to mention the intermat paint, they will always see the jet first , even if the jet can find and attack the helicopter with an IR missile, the heli can always use DIRCM

+radar guide missile can’t see a stationary target ( hovering heli )
+ir guide missile either can’t find the helicopter due to the anti IR paint or be defeated by DIRCM

Some anecdotal evidence, Tu-95, an otherwise awe impressing a/c,
has the radar return that of a large ship due to the props.
And it was a problem with semi active missiles when the launcher had to keep painting the target, and thus keep flying towards it, closing range so it would eat a short range missile in return, that is no longer the case with active missiles.

i know the blade have large radar return , and i know if the heli is moving there will be no problem for the fighter to shot down it, but what if the heli is hover stationary will the blade show on the jet’s radar screen 😎 because the heli blades actually spinning in a small circle so will they be rejected by the radar just like chaff:)

DJCross is right, there´s no contest, the doppler return was a real problem for the likes of the AN/APQ-72 (back in 1978), not today. The heli blades are a gigantic radar return beacon. Today against a decent equiped FJ fleet the Helicopter will not only get detected, it will get locked. targeted and destroyed, the heli can be moving or hovering, its indiferent.
There´s one good reason why no one tries to go “mano to mano” with FJ using Heli´s, its a suicide.

i know the heli blades are gigantic radar return beacon but they donot move for a long distance like an air plane but rather stay spin in a circle will the radar screen show them :rolleyes:

No contest.
Doppler radar sees the flicker of advancing and retreating rotor blades quite well.

i dont think it will see it as a target , much slower than chaff release at high speed , and these radar reject chaff:diablo:

So do you guy think something like aim-120 , meteor or R-77 can operate in the same maner:rolleyes:

From what i read on some website it seem that NSM is not a very good missile as it’s seeker only have 1.5 sec to acquire target:confused: , with the speed of mach 0.8 it mean that NSM ‘s sensor can only detected enemy ship at 400 metter:confused: .Not impress at all isn’t it, compared to any other radar guide missile