apart form this, what more make me think negatively about them is the fact that the biggest edge of the fifth generation planes, ie the stealth can be countered by specific radar. so for me, investing in counter stealth technology is a far better option then investing in the fifth generation!
this will bring down the cost and make a plane capabale of countring stealth of any plane ! ! !
regards!
You are not thinking negatively at all. It is extremely pragmatic thinking. There have been much conjecture and a little research into 'Anti Stealth' technologies. Mainly since the primary powers in the world namely US, Russia and China either have Stealth fighters or are planning to have them soon. The second tier of nations comprising of European/NATO allies and friends of Russia and China are also planning to bask in the reflected glory of their patrons.
Not much work has been done on anti-stealth technologies. But that may change as soon as Russia and China join the fun and games by about 2017/2020. Among the advancements that have been made in the field of anti-stealth, the most promising looks like the
The Associative Aperture Synthesis Radar (AASR) . This is a Sweedish initiative which is promising but still has a long way to go.(ARES-Aviation Week)
Details of a formerly secret project to defend Swedish airspace against stealthy cruise missiles using a radical but inexpensive radar system were revealed at a conference in Oslo this week. The Associative Aperture Synthesis Radar (AASR) was approaching the hardware-test stage when it was cancelled in 2000 after eight years of work - because there was no imminent cruise-missile threat any more. It has only recently been declassified and this was one of the first open, formal briefings on the project.
The AASR was designed to take advantage of the principle that a target's bistatic radar cross section - where the radar receiver and transmitter are in different places - may be affected minimally or not at all by stealth measures aimed at conventional radars. In particular, it exploits the "shadow" RCS behind the target, which depends entirely on the target's geometrical cross-section. The radar was also designed to operate in the UHF band where radar absorbent material (RAM) is less effective.
Developer Hans Hellsten of Saab Microwave Systems told the conference that the AASR used a number of novel techniques. Each transmitter would transmit on stepped frequencies so that receivers could tell where a signal came from. This made it possible to determine the length of the signal path, so that if a signal was picked up at several nodes it was possible to determine the target's location precisely.
One disadvantage: the transmitter and receiver had to be on opposite sides of the target, so it could not be detected until it had entered the defended airspace. To get around that problem and still intercept targets in a timely manner, Swedish planners expected to exploit the system's accuracy - it could locate targets within 1.5 m - and command-guide a high-speed missile on to the target.
But because the system used range rather than bearing to locate its targets, the antennas did not need to have accurate bearing resolution. Also, the system's use of UHF, its independence from target RCS and the fact that bistatic systems have long pulse times meant that the necessary power was modest.
The result was a price that caused sharp intakes of breath among the delegates. Each of the 900 nodes was expected to cost no more than 1 million Swedish kroner (about $156,000) and the entire system would be in the 1 billion kroner ($156 million) realm - pretty much chickenfeed by defense standards.
Moreover, trying to destroy an air defense radar with 900 distributed apertures is an exercise in futility. The grid pattern does not have to be continuous, and the designers intended to emplace the modules using the same techniques that are used to locate cell phone base stations.
We've seen many anti-stealth ideas come and go over the years, such as the UK's cell-phone radar concept or the Russian Nagira high-powered radar. But AASR is the first advertised system-level attack on stealth to emerge from a full-up combat radar house - and these are the people - the former Ericsson Microwave, acquired by Saab in June 2006 - who produced the world's first airborne AESA and notched up a number of other firsts over the years.
