KF-X Fighter's Electronic Warfare Ability
Author: 안승범 Views: 574 13 1 Modified: 2019-08-09 03:15:35 (Source-from Monthly Defense Times July 2019)
The ALQ-200K Electronic Warfare Ford was employed in the KF-16 Fighter Program as well as the KF-16D Fighter. Unlike the existing ALQ-200K pod, the ALQ-200K for KF-X fighters will be reconfigured as a built-in electronic warfare system rather than an external pod.
To this end, the core components of the ALQ-200K will be embedded inside the KF-X fighter. Among the advantages of the ALQ-200K is its high output and high output antenna gain, which is important in the KF-X fighter program. This is because the Air Force requires the KF-X to produce high power electronic disturbances. 
For this reason, looking at the KF-X model, it can be seen that a large electronic warfare ECM antenna, reminiscent of the rear antenna of the ALQ-135M ICS, an electronic warfare equipment of the F-15K, will be installed at the rear of the KF-X fighter.
KF-X is designed as a low detectable rate (RCS) aircraft. The combination of low detection rate (RCS) and high power density of the electronic warfare system can result in low SNR for KF-X on enemy radars and RF seekers, even at relatively close range.
In other words, the KF-X fighter will have a very high survivability by incorporating a high power electronic warfare system into the KF-X fighter with a low RCS.
The original ALQ-200K Ford is powered by a KF-16D fighter seated external electronic warfare system that cannot accommodate the ASPJ Electronic Warfare Jammer's LRUs (consisting of five LRUs) inside the aircraft due to the rear seats.
The ASPJ and the ALQ-200K Ford aren't much different in terms of pilot interface. There are advantages and disadvantages to both.
The advantage is that the ASPJ equipment is built-in, so there is no drag increase and it does not occupy the centerline below the gas on which the fuel tank is mounted.
The ALQ-200K pose has the advantage of having a larger output and larger antenna than the built-in ASPJ, making the burn-through range smaller for the same disturbing target in the same tactical situation. And because it is domestic equipment, the upgrade is easier.
Other strengths of the ALQ-200K Ford include phase-contrast detection algorithms, high-directional disturbance signal transmission, ability to respond to High-Pulse Repetition Frequency (PRF) pulse-Doppler radars, and agile steering control using multiple beam phased array antennas. to be.
High PRF pulsed Doppler radar responsiveness allows the pulsed Doppler radar to cope with densely and agile use of modulation using frequency modulated baseband signals within short pulse repetition time (PRT) and agile modulation of the carrier itself.
By using a phased array antenna Lotman lens, the phases of each array port are different and the pencil beam steering angle is the same according to the selected frequency and the signal input time of each array port (depending on which beam port behind the array is selected).
Using multipoint multi-beam rapid steering, frequency modulation, and multiple disturbing target response using hops are typical advantages of the ALQ-200K.
The mechanism's disturbing signal steering technology has also been applied to the Navy ship's flagship electronic warfare system, the SLQ-200K Sonata System.
It also benefits from the introduction of multiple phase channel reception and phase contrast probes, which have also been introduced in the ARD-300K (TAC-ELINT) pod for the RF-16 reconnaissance aircraft.
In conjunction with the phased array signal steering technique, the three-dimensional orientation of multiple disturbing targets can be precisely measured, and the measured orientation allows the use of rapid disturbance techniques. 
KF-X is a medium-end fighter
However, even with this in mind, the argument that 'KF-X can be operated by the same level of penetration attack as the F-35 against North Korea' is somewhat unreasonable.
Despite the difference in stealth performance between the F-35 and KF-X, the F-35 has no change in RCS when equipped with two 2,000-pound guided bombs (GBU-24, GBU-31, etc.) and missions such as blocking attacks. KF-X is due to an increase in RCS. The 2,000 pound precision guided ammunition, such as the GBU-24 and GBU-31, is due to the unacceptable limit of the Internal Weapon Bay (IWB) of the KF-X.
The F-35 is a stealth fighter with two GBU-31s on its air to ground attack, a key aircraft for long range high altitude air to ground penetration.
KF-X fighters, however, need to be mounted outside the wing to mount homogeneous ammunition, and to the targeting pod (for final confirmation of targets and precise target coordinates from the 2,000-pound JDAM release) and the F- with ETS.
As the 35 does not have a separate external targeting pod, the RCS will increase, so you must create a flight to avoid detection and incorporate it into your mission plan.  These flights include a number of factors that reduce the aircraft's mission radius, and given the increased drag caused by external armament, the KF-X fighter is far more than the F-35, which can invade until D + 3 in the presence of hostile air defense systems. It is shallower and more viable than the F-35.
The F-35 uses an automatic mission support system to calculate the areas where enemy radars detected by AN / ASQ-239 equipment can detect the F-35 and the areas that can be safely operated so that the F-35 can utilize stealth performance optimally.
While offering to KF-X, which is not much different from 4.5G fighters in terms of interface and sensor fusion, has no automatic mission support system that is integrated with the integrated electronic warfare system, which is a decisive factor in the gap between the F-35 and KF-X. 
Indeed, given the position of both sides in the ROK Air Force. The F-35 is a high-profile third-tier FX program that was decided in 2013 after the introduction of 61 F-15K aircraft to meet the high-end fighter jet requirements (120) reflected in the 1994 Joint Strategic Plan (JSOP) 96-00. As an end fighter, it is a deep heart attack.
On the other hand, on the ROK Air Force's future fighters' roadmap since 2001, the KF-X fighters are planned as medium-end fighters, like the KF-16 enhanced and F-16PBU. The mission abilities of the KF-X and the KF-16 revamps are somewhat different, but the ultimate task is the medium-end fighter.
The required performance of the KF-X and its calculated operational requirements (ROC) were also tailored to the mission of the medium-end fighter required for the KF-X fighter.
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