KLJ-5 Radar

Manufacturer: NRIET (Nanjing Research Institute of Electronics Technology)
Category: Radar Systems
Add to Compare

Detection Range 75–100 km (fighter-sized target, est.)
Frequency Band X-Band (est.)
Antenna Type / Technology Mechanically Scanned Planar Array
Target Tracking Capacity 6–8 targets (est.)

Full Specifications

1. General Information

Name / Designation	KLJ-5 Fire-Control Radar
Manufacturer	NRIET (Nanjing Research Institute of Electronics Technology)
Country of Origin	China
Type / Role	Airborne fire-control radar
Operational Domain	Air-to-air / Air-to-ground
Status	In limited service; partially superseded

2. Technical Specifications

Frequency Band	X-Band (estimated)
Antenna Type	Mechanically Scanned Planar Array
Antenna Aperture / Size	Classified / Not publicly disclosed
Power Output	Not publicly disclosed
Detection Range	75–100 km (fighter target, est.)
Tracking Range	~70 km (est.)
Target Tracking Capacity	6–8 targets
Elevation Coverage	±55° (est.)
Azimuth Coverage	±6
Beam Steering	Mechanical
Pulse Repetition Frequency (PRF)	Medium/High PRF modes
Resolution	Moderate (legacy pulse-Doppler class)
Update Rate	Standard for mechanically scanned radars
Clutter Rejection / ECCM	Anti-jamming, frequency agility, MTI filtering

3. Functional Capabilities

Primary Functions	Air-to-air detection, tracking, and missile cueing
Target Types	Aircraft, helicopters, limited ground targets
Integration / Networking	Compatible with older Chinese avionics suites
IFF Capability	Yes (standard modes)
Data Link / Networking	Basic aircraft bus integration
Weather & Terrain Resistance	Standard pulse-Doppler filtering
Mobility / Mounting	Internal nose-mounted

4. Physical & Operational Characteristics

Dimensions	Not publicly disclosed
Weight	Estimated 80–120 kg
Power Requirement	Aircraft avionics bus
Cooling System	Liquid or air cooling (platform dependent)
Operating Temperature Range	Standard airborne environmental limits
Deployment Platform	Light fighter aircraft
Crew Requirement	Pilot (single-seat compatible)

5. Software & Processing

Signal Processor Type	Legacy digital signal processor
Processing Speed	Moderate (4th-gen radar class)
AI / Automation Features	None; pre-AESA architecture
Data Output / Interface	Aircraft mission computer integration
Software Upgradeability	Limited

6. Operational History

Year Introduced	Early 2000s (est.)
Users / Operators	Select Chinese and export customers
Notable Deployments	Integrated on older lightweight fighters
Successor / Predecessor	Successor: KLJ-7 / KLJ-7A AESA

7. Export / Compliance Data

Export Availability	Limited, via Chinese military export channels
ITAR / MTCR Status	Not subject to U.S. ITAR/MTCR; Chinese export-controlled
Cost Estimate	Not publicly available

Our Rating

The overall rating is based on review by our experts

7.5

Range & Endurance 7 / 10
Stealth Capability 6 / 10
Technology 8 / 10
Maintenance Efficiency 9 / 10

PROS

Affordable compared to modern AESA radars
Compatible with diverse fighter platforms
Reliable pulse-Doppler performance
Good ECCM for its generation
Straightforward maintenance and training

CONS

Not AESA; limited by mechanical scanning
Shorter range than modern radars
Lower resolution for ground mapping
Limited upgrade potential
Reduced performance in heavy ECM environments

KLJ-5 Fire-Control Radar System

The KLJ-5 radar is a fourth-generation Chinese fire-control radar developed for lightweight and multirole fighter aircraft requiring dependable air-to-air and air-to-ground sensing performance. Designed by Nanjing Research Institute of Electronics Technology (NRIET), the KLJ-5 serves as one of the early-generation mechanically scanned pulse-Doppler radars produced for export-friendly combat aircraft. Despite being older than modern AESA systems, the KLJ-5 remains relevant for nations operating legacy platforms that need affordable, reliable, and upgradable radar capability.

Purpose and Capabilities

The KLJ-5 radar is designed primarily for air-to-air engagement support, offering look-up/look-down detection, multi-target tracking, and compatibility with short- and medium-range guided missiles. Its detection range—commonly estimated between 75–100 km against fighter-size targets—allows frontline aircraft to maintain situational awareness in contested airspace. The radar supports tracking of multiple airborne targets simultaneously and enables engagement of one target while scanning for others.

In the air-to-ground domain, the KLJ-5 provides basic mapping, terrain-following support, and strike assistance for unguided and semi-active munitions. Its electronic counter-countermeasures (ECCM) suite provides protection against common jamming techniques, making it suitable for regional air forces with limited access to advanced radar technology.

Operational Use

The KLJ-5 radar has historically been integrated into several Chinese-origin light fighters and export platforms. While it lacks the range, resolution, and reliability of AESA radars such as the KLJ-7A or the newer Chinese active arrays, it remains a cost-effective solution for nations seeking an upgrade path from analog radars without transitioning to high-cost next-generation systems.

KLJ-5 Radar Price in United State

The KLJ-5 radar is not publicly priced within the United States due to its Chinese origin and export-controlled nature. However, its cost bracket is generally considered low compared with modern AESA systems, making it attractive to nations with budget-constrained modernization programs.

FAQs

What aircraft use the KLJ-5 radar?

It has been integrated into older Chinese light fighter programs and select export-oriented platforms.

Is the KLJ-5 an AESA radar?

No. The KLJ-5 is a mechanically scanned pulse-Doppler radar.

What is the KLJ-5’s detection range?

Various open-source estimates place it around 75–100 km for fighter-sized targets.

Can the KLJ-5 track multiple targets?

Yes, it supports simultaneous target tracking with basic multi-target capability.

Is the KLJ-5 still in production?

It is believed to be in limited or phased-out production, superseded by KLJ-7/7A AESA systems.

Get real time update about this post category directly on your device, subscribe now.

Reviews

Disclaimer Note

The information provided on TheDefenseWatch.com is for general informational purposes only. While we strive to ensure the accuracy, completeness, and timeliness of our content regarding defense and aerospace products, technologies, and specifications, we cannot guarantee that all information is 100% accurate or up-to-date due to the evolving nature of military technology and classified data.TheDefenseWatch.com does not warrant the reliability, suitability, or availability of the information for any specific purpose. Users are advised to consult official sources, such as manufacturers, government publications, or defense agencies, for precise and verified data before making decisions based on our content.We are not affiliated with any defense manufacturers, governments, or military organizations mentioned. Opinions, reviews, and ratings reflect expert analysis but are subjective and should not be considered endorsements. TheDefenseWatch.com is not responsible for any errors, omissions, or consequences arising from the use of this website’s content.External links are provided for convenience and do not imply endorsement. TheDefenseWatch.com reserves the right to update or modify content without prior notice. By using this website, you agree to our Privacy & Cookies Policy.