South Korea presents the first model of the homemade AESA radar for their fifth generation KF-X proj

[The SC]

The radar is being developed by Korean company Hanwha .. the new radar capabilities and specifications remain unknown

Picture of the fifth-generation fighter KF-X model

 

[Thəorətic Muslim]

Has a KF-X design been agreed to?

There was a 2 fin (larger) and 1 fin (smaller) model.

 

[dani191]

wierd they ask us for help develop the radar

 

[KAL-EL]

Good for South Korea

 

[The Sandman]

Why every stealth fighter looks kinda like f22/35?

 

[jamal18]

Why every stealth fighter looks kinda like f22/35?

Because all wind tunnels give the same result......

 

[gambit]

Why every stealth fighter looks kinda like f22/35?

NOT because they want to emulate US.

In designing a radar low observable, aka 'stealth', body, there are three rules to observe...

1- Control of quantity of radiators
2- Control of array of radiators
3- Control of modes of radiation

A 'radiator' is any structure that can and WILL reflect EM signals. A structure, or body, can reflect, but it maybe made of materials that will absorb all EM signals and reflects none. Hence, the 'can' and 'will'. For now, there are no materials that completely absorb all of the radar related EM spectrum. So pretty much all aircrafts CAN and [/b] WILL[/b] reflect.

Based upon those three rules, or more like guidelines, the most 'stealthy' body is the sphere.

The sphere has only one radiator -- its own body. In order to have an array of structures, you must have more than two bodies, so rule two is out. The sphere have the least modes of radiation, or how an EM signal can leave the body. Those modes are surface waves and specular reflections. Other bodies can have specular reflections, surface waves, and edge waves.

The sphere is the most obedient to those three rules and this is why the sphere is used as a reference body in radars.

http://www.centurymetalspinning.com/radar-calibration-spheres/
https://en.wikipedia.org/wiki/Lincoln_Calibration_Sphere_1

...LCS-1, is a large aluminium sphere in Earth orbit since 6 May 1965. It is the oldest spacecraft still in use, having lasted for over 50 years.

So when you look at an aircraft from an aerodynamics standpoint, you will see common structures like wings, horizontal stabilators, vertical stabilators, and fins. They may be different shapes and in different locations but all aircrafts have them, one way or another. Only the extremes like the flying wing B-2 or the rocket are categorically different.

Same for radar. The F-22 and F-35 quite set the standards on how modern day 'stealth' fighters should look because the US figured out the most obedient body to rule 2: Control of array of radiators.

Look at the Russian PAK and the Chinese J-20. They have F-22 and F-35 signatures all over.

 

[The Sandman]

NOT because they want to emulate US.

In designing a radar low observable, aka 'stealth', body, there are three rules to observe...

1- Control of quantity of radiators
2- Control of array of radiators
3- Control of modes of radiation

A 'radiator' is any structure that can and WILL reflect EM signals. A structure, or body, can reflect, but it maybe made of materials that will absorb all EM signals and reflects none. Hence, the 'can' and 'will'. For now, there are no materials that completely absorb all of the radar related EM spectrum. So pretty much all aircrafts CAN and [/b] WILL[/b] reflect.

Based upon those three rules, or more like guidelines, the most 'stealthy' body is the sphere.

The sphere has only one radiator -- its own body. In order to have an array of structures, you must have more than two bodies, so rule two is out. The sphere have the least modes of radiation, or how an EM signal can leave the body. Those modes are surface waves and specular reflections. Other bodies can have specular reflections, surface waves, and edge waves.

The sphere is the most obedient to those three rules and this is why the sphere is used as a reference body in radars.

http://www.centurymetalspinning.com/radar-calibration-spheres/
https://en.wikipedia.org/wiki/Lincoln_Calibration_Sphere_1


So when you look at an aircraft from an aerodynamics standpoint, you will see common structures like wings, horizontal stabilators, vertical stabilators, and fins. They may be different shapes and in different locations but all aircrafts have them, one way or another. Only the extremes like the flying wing B-2 or the rocket are categorically different.

Same for radar. The F-22 and F-35 quite set the standards on how modern day 'stealth' fighters should look because the US figured out the most obedient body to rule 2: Control of array of radiators.

Look at the Russian PAK and the Chinese J-20. They have F-22 and F-35 signatures all over.

Thank you for a detailed answer appreciate it.

 

[Fledgingwings]

The Model looks appealing!

 

[The SC]

Prototype of KF-X Jet Radar Unveiled
(Source: Korean Observer; published July 13, 2017)

Korean defense company Hanwha Systems unveiled its first prototype of a radar system for the country’s self-developed fighter jets, Thursday.

The first prototype, comprised of an antenna and power supply, has been produced to verify whether or not the nation is able to go forward with the development of active electronically scanned array (AESA) radar with domestic technology, according to the Agency for Defense Development (ADD).

The development of AESA radar is part of the 8.5 trillion won ($7.5 billion) KF-X project to build 4.5-generation indigenous fighters by 2026 to replace the Air Force’s aging fleet of F-4s and F-5s. The government will invest an additional 10 trillion won ($8.8 billion) to produce 120 aircraft by 2032.

The ADD is supervising the development of the radar, essential equipment that helps a pilot identify friend or foe in battle and finds targets on the ground.

Hanwha Systems, previously Hanwha Thales, was selected in April last year to manufacture the radar system.

The company showed the prototype to journalists at its research center in Yongin, Gyeonggi Province, during which it gave a demonstration of a transmitting electric wave.

“Based on the first prototype, we will continue to work to develop the final version the KF-X will be equipped with,” said an ADD official, asking not to be named.

The official noted that a committee meeting was held June 28 and 29 to check whether to proceed with domestic development.

“The committee members concluded that the nation can consistently proceed with development,” he said.

The ADD plans to send the first prototype to Israel’s Elta Systems, which signed a deal on technical assistance, for ground and air trials in September.

The official added that the agency, together with the defense arm of Hanwha Group, is also developing software for the radar system.

The Defense Acquisition Program Administration (DAPA), which is overseeing the KF-X project, earlier noted that once the AESA radar is developed, it will be integrated with the KF-X in cooperation with Korea Aerospace Industries (KAI), the nation’s sole aircraft manufacturer that signed the KF-X contract with DAPA.

Seoul was originally planning to receive AESA radar technology from U.S. defense giant Lockheed Martin, but the plan foundered after the U.S. government decided to block Lockheed from transferring four core technologies used in F-35 fighter jets ? infrared search and track, electronic optics targeting pod, radio frequency jammer and AESA radar ? to Korea for security reasons.

Following that hitch, DAPA said it would develop the technologies domestically.



SEOUL, May 23 (Yonhap) -- South Korea has formally decided to receive some technology support from Israel for the development of an advanced radar system in its KF-X fighter jet program, Seoul's arms procurement agency said Tuesday.

The state-run Agency for Defense Development (ADD) signed a contract with an Israeli defense firm on testing an active electronically scanned array (AESA) radar being developed by a South Korean company, according to the Defense Acquisition Program Administration (DAPA).

"It's about technology support related to the operation test of a prototype radar, not the development itself," the DAPA said.

The agency would not reveal the value of the contract apparently with Elta, while an industry official said it's worth around 40 billion won (US$35.5 million).

It requires sophisticated technology to test an AESA radar system and integrate it with aircraft.

This file photo shows a model picture of a KF-X fighter jet. (Yonhap) This file photo shows a model picture of a KF-X fighter jet. (Yonhap)

The DAPA's statement followed a news report that the ADD has abandoned a push to develop the radar on its own despite a partnership with a local defense firm.

In 2016, the ADD chose Hanwha Thales, a local defense firm later renamed Hanwha Systems, as the preferential bidder for the radar development. Hanhwa beat its domestic rival LIG Nex1 in the controversial competition.

The ADD said earlier it could seek outside help if Hanhwa falters in developing such an advanced radar system for use by South Korea's envisioned fighter jets.

South Korea launched the KF-X project in 2015 with the aim of producing more than 120 cutting-edge fighters to replace its aging jet fleet of F-4s and F-5s.

It plans to pour a total of 18 trillion won into the project by 2026, with the production of six prototype jets scheduled to begin in July next year

 

[dani191]

Prototype of KF-X Jet Radar Unveiled
(Source: Korean Observer; published July 13, 2017)

Korean defense company Hanwha Systems unveiled its first prototype of a radar system for the country’s self-developed fighter jets, Thursday.

The first prototype, comprised of an antenna and power supply, has been produced to verify whether or not the nation is able to go forward with the development of active electronically scanned array (AESA) radar with domestic technology, according to the Agency for Defense Development (ADD).

The development of AESA radar is part of the 8.5 trillion won ($7.5 billion) KF-X project to build 4.5-generation indigenous fighters by 2026 to replace the Air Force’s aging fleet of F-4s and F-5s. The government will invest an additional 10 trillion won ($8.8 billion) to produce 120 aircraft by 2032.

The ADD is supervising the development of the radar, essential equipment that helps a pilot identify friend or foe in battle and finds targets on the ground.

Hanwha Systems, previously Hanwha Thales, was selected in April last year to manufacture the radar system.

The company showed the prototype to journalists at its research center in Yongin, Gyeonggi Province, during which it gave a demonstration of a transmitting electric wave.

“Based on the first prototype, we will continue to work to develop the final version the KF-X will be equipped with,” said an ADD official, asking not to be named.

The official noted that a committee meeting was held June 28 and 29 to check whether to proceed with domestic development.

“The committee members concluded that the nation can consistently proceed with development,” he said.
http://www.israeldefense.co.il/en/node/29740

The ADD plans to send the first prototype to Israel’s Elta Systems, which signed a deal on technical assistance, for ground and air trials in September.

The official added that the agency, together with the defense arm of Hanwha Group, is also developing software for the radar system.

The Defense Acquisition Program Administration (DAPA), which is overseeing the KF-X project, earlier noted that once the AESA radar is developed, it will be integrated with the KF-X in cooperation with Korea Aerospace Industries (KAI), the nation’s sole aircraft manufacturer that signed the KF-X contract with DAPA.

Seoul was originally planning to receive AESA radar technology from U.S. defense giant Lockheed Martin, but the plan foundered after the U.S. government decided to block Lockheed from transferring four core technologies used in F-35 fighter jets ? infrared search and track, electronic optics targeting pod, radio frequency jammer and AESA radar ? to Korea for security reasons.

Following that hitch, DAPA said it would develop the technologies domestically.



SEOUL, May 23 (Yonhap) -- South Korea has formally decided to receive some technology support from Israel for the development of an advanced radar system in its KF-X fighter jet program, Seoul's arms procurement agency said Tuesday.

The state-run Agency for Defense Development (ADD) signed a contract with an Israeli defense firm on testing an active electronically scanned array (AESA) radar being developed by a South Korean company, according to the Defense Acquisition Program Administration (DAPA).

"It's about technology support related to the operation test of a prototype radar, not the development itself," the DAPA said.

The agency would not reveal the value of the contract apparently with Elta, while an industry official said it's worth around 40 billion won (US$35.5 million).

It requires sophisticated technology to test an AESA radar system and integrate it with aircraft.

This file photo shows a model picture of a KF-X fighter jet. (Yonhap) This file photo shows a model picture of a KF-X fighter jet. (Yonhap)

The DAPA's statement followed a news report that the ADD has abandoned a push to develop the radar on its own despite a partnership with a local defense firm.

In 2016, the ADD chose Hanwha Thales, a local defense firm later renamed Hanwha Systems, as the preferential bidder for the radar development. Hanhwa beat its domestic rival LIG Nex1 in the controversial competition.

The ADD said earlier it could seek outside help if Hanhwa falters in developing such an advanced radar system for use by South Korea's envisioned fighter jets.

South Korea launched the KF-X project in 2015 with the aim of producing more than 120 cutting-edge fighters to replace its aging jet fleet of F-4s and F-5s.

It plans to pour a total of 18 trillion won into the project by 2026, with the production of six prototype jets scheduled to begin in July next year

http://www.israeldefense.co.il/en/node/29740
https://defence.pk/pdf/threads/south-korea-to-buy-aesa-radar-for-kf-x-fighters-from-israel.497592/

 

[KediKesenFare3]

NOT because they want to emulate US.

In designing a radar low observable, aka 'stealth', body, there are three rules to observe...

1- Control of quantity of radiators
2- Control of array of radiators
3- Control of modes of radiation

A 'radiator' is any structure that can and WILL reflect EM signals. A structure, or body, can reflect, but it maybe made of materials that will absorb all EM signals and reflects none. Hence, the 'can' and 'will'. For now, there are no materials that completely absorb all of the radar related EM spectrum. So pretty much all aircrafts CAN and [/b] WILL[/b] reflect.

Based upon those three rules, or more like guidelines, the most 'stealthy' body is the sphere.

The sphere has only one radiator -- its own body. In order to have an array of structures, you must have more than two bodies, so rule two is out. The sphere have the least modes of radiation, or how an EM signal can leave the body. Those modes are surface waves and specular reflections. Other bodies can have specular reflections, surface waves, and edge waves.

The sphere is the most obedient to those three rules and this is why the sphere is used as a reference body in radars.

http://www.centurymetalspinning.com/radar-calibration-spheres/
https://en.wikipedia.org/wiki/Lincoln_Calibration_Sphere_1


So when you look at an aircraft from an aerodynamics standpoint, you will see common structures like wings, horizontal stabilators, vertical stabilators, and fins. They may be different shapes and in different locations but all aircrafts have them, one way or another. Only the extremes like the flying wing B-2 or the rocket are categorically different.

Same for radar. The F-22 and F-35 quite set the standards on how modern day 'stealth' fighters should look because the US figured out the most obedient body to rule 2: Control of array of radiators.

Look at the Russian PAK and the Chinese J-20. They have F-22 and F-35 signatures all over.

Thank you very much for the explanation.

tl;dr
No need to reinvent a wheel.

 

[The SC]

http://www.israeldefense.co.il/en/node/29740
https://defence.pk/pdf/threads/south-korea-to-buy-aesa-radar-for-kf-x-fighters-from-israel.497592/

The state-run Agency for Defense Development (ADD) signed a contract with an Israeli defense firm on testing an active electronically scanned array (AESA) radar being developed by a South Korean company, according to the Defense Acquisition Program Administration (DAPA).

"It's about technology support related to the operation test of a prototype radar, not the development itself," the DAPA said.

 

[Daghalodi]

Wow!!! Amazing!!!

Congratulations and well done south korea

 

[indianfighter1999]

South Korean industry is leading the world in many things, I am pretty sure this radar is comparable or even better than EU or Russian ones.