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TMor

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Viewing 15 posts - 631 through 645 (of 1,365 total)
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  • TMor
    Participant

    He may have heard of the RADANT antenna… link

    But he won’t go far… it’s for PESA…

    TMor
    Participant

    i’m acknowledge i’m a pleb and if you explained this at the beginning instead of the end
    we all would have saved some time, i will send thales an email as i still dont understand how the spectra jammer is electronically steered and they might have a diagram of it

    i still dont understand how the spectra jammer is electronically steered

    Just like the radars… What’s the problem ?

    TMor
    Participant

    ok, is this a translation thing, aesa is also called active phased ?

    http://en.wikipedia.org/wiki/Active_Electronically_Scanned_Array

    An Active Electronically Scanned Array (AESA), also known as active phased array radar is a type of phased array radar …

    I think this sentence says it all. (nice to see that you read my messages carefully)

    TMor
    Participant

    LOL no it isnt http://kovy.free.fr/smiley/mur.gif

    This thread is full of reality denial. 😀

    TMor
    Participant

    http://forum.keypublishing.co.uk/showpost.php?p=1259591&postcount=90
    What a pity ! The link is dead.

    So, we have a system which uses :

    • AESA jamming ;
    • active phased array ;

    the current RBE2 active phased array

    On the current RBE-2, the array is not active.

    Spectra is the first french military programme to start such a high scale production of AsGa MMIC…
    http://www.polytech-lille.fr/cours-transistor-effet-champ/hyper/hyperc3.htm

    TMor
    Participant

    APA and AESA, well they are virtually the same, except for the different meaning :rolleyes:

    An Active Electronically Scanned Array (AESA), also known as active phased array radar is a type of phased array radar whose transmitter and receiver functions are composed of numerous small solid-state transmit/receive (T/R) modules.

    So… Spectra uses active phased array for the AESA jamming technique. Then ?

    TMor
    Participant

    we are talking the jammer transmitter system arent we
    ‘active phased-array’ isnt ‘Active Electronically Steered Array’ is it
    excuse the wiki link, but it does provide a broad over view
    http://en.wikipedia.org/wiki/Phased_array

    Can you tell me how to shift the phases, if not electronically ?

    TMor
    Participant

    Well, jackjack…

    We have PHASED ARRAY transmitters and “AESA jamming” technique all together…

    I’m still looking for another Thales brochure which was more explicit, but i think you’re doing your best not to see…

    TMor
    Participant

    as i said, i think ‘aesa jamming’ refers to an ability to jam aesa and as such doesnt need any aesa equipment and not meant that the rwr/jammer is an “Active Electronically Steered Array”

    Strange idea, don’t you think, to tell “ability to jam AESAs on 360° !”

    http://www.thalesgroup.com/Portfolio/Defence/Aerospace_Product_SPECTRA/?pid=1568

    SPECTRA
    Loading…

    The SPECTRA system for the Rafale combat aircraft operates in electromagnetic, laser and infra-red domains. Using sophisticated techniques, such as interferometry for high precision DOA and passive ranging, digital frequency memory for signal coherency and active phased-array transmitters for maximum effectiveness and covertness, the highly advanced multi-sensors and artificial intelligence data fusion capabilities of SPECTRA provide the Rafale aircraft with the best chance to survive in harsh and lethal environments. The Rafale combat aircraft and the SPECTRA system are fully operational onboard the French Navy’s Rafale.

    Offering unique high sensitivity detection and multiple threat capability, and operating smart data fusion between multi-spectral sensors, it provides identification, location, jamming and decoying against an extensive range of electromagnetic, infra-red and laser threats.

    Additionally, SPECTRA fulfils new functions in a combat aircraft, while significantly participating in the determination of the aircraft’s tactical situation, and providing the crew with operational advantage by performing accurate threat location.

    By virtue of its fully passive situational awareness capability, SPECTRA is a major contributor to the low observability concept of Rafale.

    “active phased-array transmitters” Do you agree ?

    TMor
    Participant

    There is this video too
    http://www.kakimediadesign.com/2009/thales-onboard-the-rafale/
    (watch it in full screen and HD)

    http://img94.imageshack.us/img94/2786/spectraaesa.png

    360° solid state RF AESA Jamming

    TMor
    Participant

    http://www.thalesonline.com/Pages/PressRelease.aspx?id=10850

    The system’s cutting-edge defensive measures are based on combinations of omni-directional AESA jamming, multi-band decoying and evasive manoeuvres, as well as on state-of-the-art technologies such as Digital Radio Frequency Memory (DRFM) signal processing.

    Defensive measures based on AESA jamming…. This should need AESA…. somewhere.

    Still looking for other sources.

    TMor
    Participant

    JackJacko, i’m searching on my hard drives, i’ll tell you ASAP.

    TMor
    Participant

    are you sure you gave me the right link, i cant see aesa mentioned on the page. only the future aesa radar

    i dont think dassault has claimed that they are asea based rwr or transmit

    Look at this :

    Full integration of the AESA RBE2 positions the Rafale as the only combat aircraft of its category equipped with active arrays for both its radar and electronic warfare suite. This outstanding system that allows a 360-degree smart antenna array coverage, is a real technological breakthrough on-board the aircraft.

    http://www.flightforum.org/index.php?topic=2164.0
    http://defense-update.com/features/2008/november/rbe2aesa_rafale_081108.html

    There is also a Thales brochure where it’s said that Spectra uses AESA but i can’t find the link.

    the 1 deg receive and transmit ?

    Search the article “killer angels” by Bill Sweetman. I’ve checked Fox Three (issue 4) but it’s not in.

    TMor
    Participant

    its a shame no one has asked him or thales or dassault to clarify what he said and meant by invissible, was it deception, different range, different aircraft, showing multiple aircraft, etc ?

    We have no answer.

    Even AC is just a journalist’s suggestion. So, imho, we simply don’t know, and aren’t supposed to know :D.

    There are some very specific techniques to obtain the signature of a real LO [low-observable] aircraft.

    We don’t know what he was referring to.

    the other thing i have been wondering, and as i have said, i’m a pleb
    “Dassault has stated that the EW transmit antennas can produce a pencil beam compatible with the accuracy of the receiver system (1 deg), concentrating power on the threat while minimizing the chances of detection”

    Information found in Fox Three for the first time, but also published in several publications.

    i fully accept directional rwr and have seen ‘sector’ but not the 1 deg
    as for the jammer transmitting on 1 deg, i would like to know how its done as i havent heard of this before

    Some of the arrays of Spectra are AESA (this is why Thales claimed that Rafale was already equiped with a 360 degrees AESA set).
    You may want to look at this : http://rafale.freeforums.org/post102.html#p102

    By the way, i’m not sure Dassault/Thales are the only one to claim they achieved the “under one degree” accuracy for ESM/ECM.

    TMor
    Participant

    It’s not that i’ve no argument, but i don’t want to be labelled as an Active cancellation moron.

    And I don’t really care about this feature. Arthuro consider AC as a rumor, and so he thought about the ISAR NCTR. That’s all.

Viewing 15 posts - 631 through 645 (of 1,365 total)