PLA AEW&C, SIGINT, EW and MPA thread
- Thread starter Sczepan
- Start date
Came across this old post by 万年炎帝 on KJ-3000's detection capabilities where he (& others in comments) claims even B-21 & 6th gens basically can't hide within its radar horizon. Which I find optimistic, or at least interesting. Have there been any other comments/claims on the KJ-3000's capability vs B-21s specifically, by any of the usual sources (Weibo or elsewhere)?
None and i never seen any modeling yet on KJ-3000 or even KJ-2000 radar range against B-21 or even older stealth aircraft. Kinda wonder tho what was the base of the statement. I'm actually did some, let's just say back of napkin math.. that KJ-3000 can have some 2.5 MW of power generation. If 20% of that power can be directed to Radar.. It can support 250 Watt TRM with 20% duty cycle. Then it can detect target with RCS of 0.001-0.01 at distance of 117-208 km. More power is possible but will be constrained by available cooling.
Also. Regarding "Oh newer gen material is not easily heated" Well it's something referred as "Thermal Time Constant" Which basically determine how fast the material can heat up when power is applied and emitted. Afaik This will constrain the peak power and pulsewidth. Means if one can have better TTC.. Then his TRM can be very flexible, can emit short or very short high power pulse, solid state transmitter typically have problems with or long one.
Still law of Thermodynamics exist. efficiency or PAE (Power Added Efficiency) for whatever amplifier used in the TRM (GaN, GAaS etc) Is determined by Bias of the amplifier, which i stated elsewhere for A-Class is about 33-35%. So even with "Good TTC" a TRM with 100 W power and PAE of 30% Will still make heat and this have to be removed. Large cooling capacity is still needed.