AIM-174 Very Long Range AAM (SM-6)

Scott Kenny said:
That makes an antenna roughly 3.7x larger in area, which IIRC my radar stuffs correctly means a roughly 3.7x greater radar range.

Do I have that right, @Dilandu ?
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Yes, power and gain on the top row are proportional to area (which is proportional to diamater^2) for ESA radars assuming equal modules and that is divided by R^4 on the bottom row. All assuming equal wavelength.

The Radar Range Equation​

The Radar Equation - Radartutorial

www.radartutorial.eu www.radartutorial.eu
 
Forest Green said:
Yes, power and gain on the top row are proportional to area (which is proportional to diamater^2) for ESA radars assuming equal modules and that is divided by R^4 on the bottom row. All assuming equal wavelength.

The Radar Range Equation​

The Radar Equation - Radartutorial

www.radartutorial.eu www.radartutorial.eu
Click to expand...
The AIM-120 uses a slot antenna, and the RIM-174 should also use a same type of antenna. JR]AKWWJO$WK}4$G$BVQKUW.png
 
Actually, something quite strange is that modern ARH generally use the Ku-band. This is actually advantageous; for example, PAC3 or 9M317M have extremely small beamwidth, Maybe only 2-3°. And AAM with smaller radar antenna apertures, such as the AAM-4B or MICA-EM, can also achieve a main lobe width of around 7° using the Ku band, which can significantly improve the target SNR.
However, the AIM-120 has always used the X-band since its inception. Perhaps the band used by RIM-174 remains unchanged. Even using the upper limit of 12 GHz for calculations using the IEEE X-band, the beamwidth of RIM-174 might still be as high as 6°.
 
Sferrin said:
Everything old is new again. Personally, I preferred the F-22 carrying Minion.
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At ~$53/ lb, the combination of 7,500lbs at $400,000 seems really out of the norm by 1-2 order of magnitude. I wonder if it’s a typo and they left out a 0 and meant $4M. At $530/lb it is still really aggressive but somewhat more believable when some are guessing CCAs can be built at $1200/lb and inflation making up some of the difference. Then again maybe that’s why the minion never made it to the light of day…
 
Japan's Ministry of Defense proposed joint production of the SM-6 to the United States early last year, but there has been no progress since then, suggesting the proposal was rejected.
 

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