Possibly MIMO radars.
Chinese Radar Developments - KLJ series and others
- Thread starter indochina
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Possibly MIMO radars.
To explain MIMO radars:
To explain the essential difference between AESA vs. PESA, it is in the centralization of the amplifiers (PESA) vs. the decentralized distribution of the amplifiers (AESA).
Between MIMO and non-MIMO radars, it is in the centralization of the signal-waveform generator (non-MIMO) vs. the decentralization and distribution of the signal-waveform generator. To explain, even in AESA, the whole array even with thousands of transmitters, each with a amplifier on their own, are still coordinated by a single waveform generator that serves like a single heartbeat for the entire body. In MIMO, each transmitter has its own waveform generator. Moreover, in AESA, each module has its own Rx/Tx, but in MIMO, Rx and Tx are located separately. This means that each transmitter can transmit a different waveform separately and uniquely from each other, whereas in an AESA array, every Tx element sends out the same waveform.
Some basic wiki information.
If this sounds a bit familiar, this is sort of like 5G. Telecom are full of MIMO arrays from your base station to your wifi routers to your satellite communications, a good example would be Starlink.
There are also many papers and books done in China on that subject and its easy to google them up.
I don't see this replacing AESA for its traditional applications like aerial surveillance. Where I see MIMO radars being used at is with drones, UAVs and automobiles.
To explain the essential difference between AESA vs. PESA, it is in the centralization of the amplifiers (PESA) vs. the decentralized distribution of the amplifiers (AESA).
Between MIMO and non-MIMO radars, it is in the centralization of the signal-waveform generator (non-MIMO) vs. the decentralization and distribution of the signal-waveform generator. To explain, even in AESA, the whole array even with thousands of transmitters, each with a amplifier on their own, are still coordinated by a single waveform generator that serves like a single heartbeat for the entire body. In MIMO, each transmitter has its own waveform generator. Moreover, in AESA, each module has its own Rx/Tx, but in MIMO, Rx and Tx are located separately. This means that each transmitter can transmit a different waveform separately and uniquely from each other, whereas in an AESA array, every Tx element sends out the same waveform.
Some basic wiki information.
If this sounds a bit familiar, this is sort of like 5G. Telecom are full of MIMO arrays from your base station to your wifi routers to your satellite communications, a good example would be Starlink.
There are also many papers and books done in China on that subject and its easy to google them up.
I don't see this replacing AESA for its traditional applications like aerial surveillance. Where I see MIMO radars being used at is with drones, UAVs and automobiles.
You mean if MIMO radars are equipped on UAVs and robot wingmen? Ability to detect stealthier, slower moving objects, low probability of intercept and so on.
There is also the use of SIAR in the South China Seas islands for counter stealth.
Other applications.
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It would work as conformal flat panel arrays like you see somewhere in the Chinese UAV thread where you see conformal arrays on the side or bottom of the UAV.
AESA physically looks like a wall of PC graphic cards, but a MIMO array looks like a green printed circuit board with a series of flat squares which are large ICs on it. Each square IC circuit is a complete module to itself, whereas an AESA module is like a PC card or server blade. On higher frequency MIMO arrays, a module SOC is as big as a quarter or dime.
I might see where you may use a SIAR on a UAV implemented either as a flat or conformal panel that is used to map a landscape.
Example of how a MIMO array looks like courtesy of Huawei. These things use up GaN and its a big consumer of it in China which globally dominates Gallium production.
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by78
General
An illustration from a paper published in the journal Modern Radar. I don't have access to the paper, but according to the Weibo user who shared it, it shows a new meter wave anti-stealth radar design from. The design is very compact (as small as racks used for hanging laundries to dry) and can be easily concealed. It works by splitting the normally large meter-wave antennas into smaller parts, which are then placed some distance apart and linked via fiber optics. This arrangement can cover a larger area, but the drawback is increased noise. The key breakthrough was new signal processing algorithms and techniques to filter out the background noise.
Best of all, the could be converted into clothe racks to fool overhead satellites.An illustration from a paper published in the journal Modern Radar. I don't have access to the paper, but according to the Weibo user who shared it, it shows a new meter wave anti-stealth radar design from. The design is very compact (as small as racks used for hanging laundries to dry) and can be easily concealed. It works by splitting the normally large meter-wave antennas into smaller parts, which are then placed some distance apart and linked via fiber optics. This arrangement can cover a larger area, but the drawback is increased noise. The key breakthrough was new signal processing algorithms and techniques to filter out the background noise.