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    Russian PESA and AESA Radars

    thegopnik
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    Post  thegopnik on Thu Sep 17, 2020 5:31 am

    miketheterrible wrote:Can we get a list of the companies and their ROFAR products listed?

    KRET- We have a prototype photonic radar thus was announced to have fully been created in 2018. Hoping to get military related equipment to be ready with such radars in the 2020s.

    RTI- Have worked on PICs like a photonic radar balloon that I have posted in the past. Said they already created it and that the army would soon get it. Only company of the 3 to make announcement on starting production for PICS between 2021-2023 I believe in my previous 2018 article they stated 3-5 years.

    VEGA- Says they created a photonic radar.

    Only 3 military related companies I can think of.

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    Arrow

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    Post  Arrow on Thu Sep 17, 2020 11:09 am

    I wonder if there is a chance for the ROFAR radar on the modernized T-50 of the second stage? From what these radars write, it will be a revolution that will change a lot on the battlefield. If he really sends the stealth technologies to the bin.
    Stealthflanker
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    Post  Stealthflanker on Fri Sep 18, 2020 9:34 am

    So what does this Rofar emit ? Lasers ? or some form of other rays ?.

    x_54_u43
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    Post  x_54_u43 on Fri Sep 18, 2020 11:10 am

    Stealthflanker wrote:So what does this Rofar emit ? Lasers ? or some form of other rays ?.


    ROFARs are standard radars except built on on photonic circuits rather than electron based circuits, with resulting vastly superior performance due to photons not having mass.

    Instead of using a solid-state waveform generator feeding into a amplifier as todays electronics, you instead have a special laser and crystal that produced the waveform, with better efficiency, mass, and ability to significantly expand available bandwidth.


    Take for example the three radars of the Nebo-M series, VHF/L/S&X band AESAs and there associated command platform that fuses all their raw data into one refined "picture", a ROFAR could outperform all three radars combined(It could emit in those bands and more near simultaneously), and be smaller and lighter with less power draw and heat generation, due to the expanded bandwidth feature.
    Stealthflanker
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    Post  Stealthflanker on Fri Sep 18, 2020 11:24 am

    x_54_u43 wrote:

    ROFARs are standard radars except built on on photonic circuits rather than electron based circuits, with resulting vastly superior performance due to photons not having mass.

    Instead of using a solid-state waveform generator feeding into a amplifier as todays electronics, you instead have a special laser and crystal that produced the waveform, with better efficiency, mass, and ability to significantly expand available bandwidth.


    Take for example the three radars of the Nebo-M series, VHF/L/S&X band AESAs and there associated command platform that fuses all their raw data into one refined "picture", a ROFAR could outperform all three radars combined(It could emit in those bands and more near simultaneously), and be smaller and lighter with less power draw and heat generation, due to the expanded bandwidth feature.

    So it's basically a Photonic True Time delay AESA where the waveform from the master oscillator is "fed" to the each Transmit Receive Module via optic fiber ? Thus it is not a "Quantum Radar"

    The TRM the re-convert the laser to RF wave and emit it as usual ? The beamsteering is instead of phase shifter (which bottlenecks the bandwidth) Is done through the optic fiber which cuts into different length representing the phase required for the beamsteering.
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    limb

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    Post  limb on Fri Sep 18, 2020 12:10 pm

    Whats the difference between LIDAR, chinese quantum radar, and ROFAR?
    kvs
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    Post  kvs on Sat Oct 03, 2020 5:52 pm

    limb wrote:Whats the difference between LIDAR, chinese quantum radar, and ROFAR?

    LIDAR is simply using a laser to "sound" various targets. They are used in atmospheric science to measure vertical profiles of composition and state of the air.
    So you can measure temperature profiles and aerosols profiles by processing the back-scattered photons. LIDARs lack the ability to sample a large volume
    of space unless they are used in scanning mode. But then the limit is the mechanical apparatus which moves the angle of the laser and the time it takes
    to process the scatter from the same laser. Conventional radar sends a broad beam of radio waves (for example) and then processes the back-scatter
    from a large volume of space. Thus it can target multiple objects at the same time better than scanning LIDAR. I have not actually seen any references
    on scanning LIDAR but that is the only way to make it useful as a RADAR tech.
    thegopnik
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    Russian PESA and AESA Radars - Page 9 Empty found some new information(although old not discussed here)

    Post  thegopnik on Sun Jan 03, 2021 12:22 am

    found some new information(although old not discussed here) https://naukatehnika.com/fotonnye-radary-fotonika-stels-texnologii.html

    Russian PESA and AESA Radars - Page 9 Photon11

    "Unlike traditional radars, it will not be physically possible to silence ROFAR by traditional means of EW. The dynamic range of the photon crystal is about 200 DB. Modern electronic receiver, for comparison, has a range of 40 - 60 DB, and we modern EW complexes provide a signal to the entrance of the radio receiver - in 70-80 DB relative to its threshold sensitivity. Thus, the device that needs to receive the signal is displayed from a healthy state. Even after the interference in his inside there are still processes that do not allow him to work. But on Earth there is simply no energy source for a signal with a capacity greater than 200 DB, so this logic in the case of ROFAR simply does not work. It can be confused by so-called intellectual opposition, but this is a different story."

    Anyone like stealthflanker or other users that could dumb this EW decibel numbers down? So I am assuming that radar receiver sensitivity at most is receiving 80 decibels and that a photonic crystal has 200 decibels of receiver sensitivity? Forgive me for mentioning this thread here https://www.f-16.net/forum/viewtopic.php?f=38&t=28508 but this seems to also mention the max Receiver sensitivity of aircrafts. Are photonic radars basically un-jammable?

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    LMFS
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    Post  LMFS on Sun Jan 03, 2021 1:07 am

    They mean that jamming cannot manage to saturate the receptor, because it has a HUGE dynamic range (200 dB or 20 orders of magnitude, is even possible???). So you add the jamming signal to the RCS, but the receptor can still see both.

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    thegopnik
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    Post  thegopnik on Sun Jan 03, 2021 1:18 am

    LMFS wrote:They mean that jamming cannot manage to saturate the receptor, because it has a HUGE dynamic range (200 dB or 20 orders of magnitude, is even possible???). So you add the jamming signal to the RCS, but the receptor can still see both.

    They have made multiple news information of "ha with ROFAR you cant jam us" (naukatehnika is now my favorite news source over tass) but this is the 1st time they gave numbers and explained what those numbers are for like 40-60 receiver sensitivity, 60-80 decibels for EW systems and 200 decibels for a photonic crystal while stating there is no waves that can go above 200 decibel unless someone found such a solution for that to oppose that. Regardless I think this is great news information Shocked

    I believe this is a good image reference where the photonic crystal receiver.

    Russian PESA and AESA Radars - Page 9 Jammin10

    Russian PESA and AESA Radars - Page 9 Radar_10

    I think the blue line would start at 200.

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