Bharat Rakshak

George J wrote:EHOG=Ever heard of Google?

If you had google for it you would have found out that in March 5th, 2004 it was stated that:

"The first delivery will take place after 44 months, the second after 53 mo-nths and the third after 59 months," said a defence ministry official.

Cheers

George J wrote:

pratik_das wrote:Does anyone know what the state of the Phalcon - IL-76 package is and when the IAF will receive it?

EHOG?

Your point being?

Does anyone know what the state of the Phalcon - IL-76 package is and when the IAF will receive it?

So AESA beam shapes don't have sidelobes Yes, they do. You need an infinite number of emitters to eliminate sidelobes. But that is not the point here. The point is the power density of the main lobe when it steers. Well actually there was a need to bring up the sidelobe issue because the minima bet...

Dileep wrote:If you can vary the phase of the modules linearly, you can have the beam pointing in any angle, without null spots. The problem with PESA is that the phase change is in steps.

So AESA beam shapes don't have sidelobes?

AESA can have practically smooth beam variation. The TXs can be synced to a digitally synthesized baseband control signal. The problem of discreteness is that there is bound to be blind (to be precise, less sensitive) regions in the FOV. How does AESA alleviate the problem of null spots, or less se...

I have a question on PESA. I understand from literature that the phase shifting is at discrete intervals, and the typical resolution is 4 bits => 16 levels. My question is, will not this discreteness impart a similar discreteness in the beam placement? How can you make a smooth beam transition with...

MEMs Phase shifters - it is new sort of phase shifters for PESA (http://www.darpa.mil/darpatech99/Presentations/spopdf/spoadvancedradarfinal.pdf ), not mention Russia has it or not, PESA technologies have some advance relative to AESA's in some specific applications. Not to speek about prooved PESA...