J-20 5th Gen Fighter Thread IV (Closed to posting)
- Thread starter siegecrossbow
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Engineer
Major
Given the fact that an aircraft's fire control radar has to be in X-Band, the most likely case is that 0.0001 m[sup]2[/sup] is not a correct RCS figure for the F-22.
Blackstone
Brigadier
Don't assume F-22 fire control radar is in the X-Band when we already have Ka Band FCR in some of our aircrafts.
Engineer
Major
Don't assume a fire control radar for helicopters has any relevancy to a fire control radar for fighter aircraft. A helicopter operates in a different environment than a fighter, so the corresponding sensors have different requirements. Also, a few minutes of search will yield the operating band of the AN/AGP-77 radar:
There are good reasons why fire control radars for fighter aircraft operate in the X-band. Firstly, as you have correctly pointed out earlier, it is for resolution reasons. Secondly, use of higher frequencies would run into nasty absorption bands. For example, EM energy in the Ka-band gets dissipated by water vapor in the air, reducing the range of radars operating in such band. The choice of using X-band is a result of optimization.
thunderchief
Senior Member
Ka-band has shorter wave length (higher frequency than X-band ) . General rule of thumb - higher frequency = less range , better resolution . In this case Ka-band is used because primary target of AH-64 are armored vehicles .
That is a big statement especially if nobody in China had opportunity to actually measure RCS of F-22 . Btw , lets play games some more : even if the RCS of F-22 is 0.01 sqm ( and this is outrageous claim
) radar that would be able to detect it at 200 km would detect standard fighter-sized target of 5sqm at 945km - much better than any fighter radar today .Ka-band has shorter wave length (higher frequency than X-band ) . General rule of thumb - higher frequency = less range , better resolution . In this case Ka-band is used because primary target of AH-64 are armored vehicles .
That is a big statement especially if nobody in China had opportunity to actually measure RCS of F-22 . Btw , lets play games some more : even if the RCS of F-22 is 0.01 sqm ( and this is outrageous claim
How many 4.5 gen fighters are still 5 sqm?
thunderchief
Senior Member
Not many (they are mostly between 1 and 0.1 sqm ) . But majority of the fighters used today are still 4th gen .
ladioussupp
Junior Member
I took these two photos in Taipei Aerospace and Defense Technology Exhibition 2013.
Chung-Shang Institute of Science and Technology (CSIST) demonstrated a bi-static radar receiver with phased array antenna. It shows Taiwan's efforts to mitigate growing stealth fighters' threats.
However, it still has a large gap from warning/detecting to providing targeting data.
Chung-Shang Institute of Science and Technology (CSIST) demonstrated a bi-static radar receiver with phased array antenna. It shows Taiwan's efforts to mitigate growing stealth fighters' threats.
However, it still has a large gap from warning/detecting to providing targeting data.
The best they can hope for is early detection and interception. That said, I'm simply not convinced that they could do that in time given their constrained air space.
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