Air Force Station Yelahanka, Bengaluru

20th (Wed) - 24th(Sun), February 2019

Electronics and Radar Development Establishment


About Lab


Abbreviation of Lab : LRDE
Lab Name : Electronics and Radar Development Establishment
Address : Ministry of Defence, DRDO, C V Ramannagar,
Bengaluru-560093, India
Tel : 080 – 25243873
Fax : 080 – 25242916
Email : director@lrde.drdo.in
Director Name : Shri SS Nagaraj, Outstanding Scientist



LRDE was setup under DRDO to address the Services needs in the field of Radars, Communication Systems and related technologies. It was born out of Technical Development Establishment (TDE) at Rawalpindi and moved to Dehradun in 1946. The TDE (Electronics) further bifurcated into two wings in 1955 and moved to Bangalore as Electronics Research and Development Establishment (LRDE) and Chief Inspectorate of Electronics (CIL) in 1958. LRDE came under DRDO on 01 Jan 1958. In 1962 it was renamed as Electronics and Radar Development Establishment (LRDE) to develop Radar and Communication Systems to meet requirements of the Services. The responsibility of Communication systems development was transferred to CAIR in 2001. After implementation of Rama Rao Committee recommendations, seven cluster labs were created in DRDO and LRDE is a part of the Electronics & Communications Systems Cluster (ECS) headed by Director General (ECS).

The design and development of Indian Doppler Radar (INDRA) series radars for Army and Airforce, followed by Rajendra Phased Array Radar and 3D Central Acquisition Radar (3D CAR) for Akash Weapon system, Battle Field Surveillance Radar – Short Range (BFSR-SR) for Army, 3D Surveillance radar-ROHINI for Air Force, 3D Surveillance Radar – Revathi for Navy, 3D Tactical Control Radar (3D TCR) for Army, Low Level Light Weight Radar – BHARANI for Army, 3D Low Level Light Weight Radar -ASLESHA for Air Force, Weapon Locating Radar (WLR)-SWATHI for Army, Xtra Vision 2004 (XV 2004) for Maritime Surveillance, Primary radar for Airborne Early Warning & Control System (PR for AEW&C) for Air force, Medium Power Radar (MPR)-ARUDHRA for Airforce, Low Level Transportable Radar (LLTR)-ASHWINI for Airforce, Air Defence Tactical Control Radar (ADTCR) and Air Defence Fire Control Radar (ADFCR) for Army, etc., is a true reflector of the maturity of LRDE, not only in the mastering of ground based, ship borne and airborne complex radar systems, but also in the practice of concurrent system engineering, R&D – Industry Partnership and Professional approach to Technology & Project Management. The users’ unflinching faith has transformed LRDE as a force to reckon with. Many of such radars are now accepted or inducted by the Users.

Today, LRDE is the premier Radar Systems laboratory with Core Competence and established expertise to build advanced Radar Systems, which include short to long-range radar for ground, ship borne and air borne surveillance, tracking and weapon control. LRDE has developed many advanced radar technologies including transmit and receive modules, slotted waveguide array antennas, microstrip array antennas, multibeam antennas, high power transmitters, high purity signal sources, high bandwidth waveform generation systems, programmable signal and data processors and radar controllers.

LRDE received ISO 9001:2001 certification on 01 Mar 2006. The certificate was renewed as per the revised ISO 9001: 2008 standard wef 01 Mar 2009. LRDE is presently an ISO 9001:2015 certified establishment with a manpower of around 720 qualified Scientists/Engineers/Technical & Administrative Staff.


To create a centre of excellence in radar and electronics technologies by developing and delivering world class systems to meet the customer requirements.


  • To design and develop Radar systems meeting the current and futuristic requirements of Services and paramilitary forces, keeping in view the emerging threat and EW scenario.
  • To contribute towards building self reliance in contemporary Radar systems and associated technologies through Industry collaboration.
  • To promote collaborative research and core competence within the country, in the field of Radar systems and emerge as the national centre of excellence in Radar Technology.

Core Competencies:

LRDE is a premier Radar Systems laboratory with Core Competence and established expertise in the design and development of radars for

• Frequency Band : VHF to Ka Band
• Range : few cms to 100s of km
• Function : Surveillance, Fire Control, Imaging, Multifunction
• Platform : Ground, Sea, Air, Space
• Targets : Mines, Men, Vehicles, Ships, Aircraft, UAVs, Missiles, hells, Mortars, Satellites

The Radars developed have established :-

  • Reliable performance in all terrain and weather conditions
  • Electromagnetic Interface and Compatibility as per military standards
  • Weapon Systems Integration
  • Networking of Radar as Force Multiplier
LRDE also provides :-

  • Production Support after Transfer of Technology to Production Agency
  • Documents for User Training and Operation & Maintenance
  • Radar Life Cycle Support including Obsolescence Management
Thrust Areas:

  • Design and development of Radar systems for Indian Army, Navy, Air Force & Homeland Security, Radar technologies for multi-function and multi-mission applications.
  • Radar System Engineering
  • Develop critical radar technologies- Transmit-Receive (TR) Modules, slotted waveguide array antenna, phased array antenna, multibeam antenna, microstrip antenna, High Power Transmitters, Digital Receivers, Direct Digital Synthesis (DDS) Modules, Programmable Signal and Data Processors, Digital Beam Forming units & Radar Controllers
  • Design and Development of major sub-systems – Mechanical and Electronic Scanning Antennas, High Performance Exciters and Receivers, High Power Transmitters, Digital Signal & Data Processors, Consoles, Mechanical Engineering
  • System Integration and Evaluation
  • Radar System Integration with other entities
  • Environmental Engineering including EMI/EMC
  • Enabling ‘Make in India’ through Vendor development for Radar Subsystem realization
  • TOT & Post Production support

Shri S S Nagaraj

Born on 03 Mar 1960, Shri S S Nagaraj obtained his B.E in Electronics and Communication from Govt. BDT College of Engineering, Davanagere in 1982 and M.Tech in Electronics from KREC, Surathkal in 1986. He joined LRDE in 1987. He has been working in the area of Active Aperture Radars, Passive Phased Array Radars, Radar Signal Processing and Imaging Radars. He has been responsible for developing Signal Processor for Rajendra Phased Array radar for AKASH weapon system. He has made significant contributions in integrating Rajendra Radar with AKASH Weapon System. He was instrumental in the Realization of Long Range Tracking Radar (LRTR) for AD Program for Defence against ballistic missiles, and also in integrating this radar with AD weapon system and exploiting its capabilities to detect and track satellites, various missiles including AGNI, Launches of GSLV/PSLV of ISRO, etc.

He was involved in the development of various Surveillance, Fire Control and Imaging radars, such as Primary Radar (PR) for Airborne Early Warning and Control (AEW&C), Active Electronically Scanned Array (AESA) Radar, Synthetic Aperture Radar (SAR) and Maritime Patrol Radar for various platforms.

He is recipient of the following awards

  • DRDO Scientist of the Year Award in 2008.
  • Path Breaking Technology Award for the year 2006
  • Technology Group Award in the year 2002.

He has published many technical papers in International Radar Symposiums.

His area of interests includes System Engineering, Long Range Radars, Active Array Radars, Radar and Weapon System Integration.

He has assumed charge as the Director of the Electronics and Radar Development Establishment (LRDE) from 01 December 2014.

Products/Technologies for civil Sector

a. Indian Doppler Radar – I (INDRA-I)

Indra-I is a Tactical Surveillance Radar for Army for point and area defence or as gap filler for the air defence, especially against aircraft threat at very low altitudes.

Users : Indian Army and Indian Air Force
Status : The system have been inducted into Service. Operational with Air Force.

b. Indian Doppler Radar – Pulse Compression (INDRA-PC)

Indra Pulse Compression radar was developed to meet Air Defence requirements of the Air Force. It is a low flying target detection 2D radar. The radar mounted on three wheeled vehicles, is transportable by Rail, Road and Air.

Users : Indian Air Force

Status : Operational with Air Force

c. Battle Field Surveillance Radar – Short Range (BFSR-SR)

The Battle Field Surveillance Radar – Short Range (BFSR-SR) is a man portable, battery operated Surveillance Radar developed for the Indian Army. The radar has been developed for deployment in the forward localities with the capabilities to detect, track and classify variety of moving ground surface targets. BFSR-SR – a reliable sensor for day and night operations in all weather conditions – has made surveillance of forward areas effective in 24 X 7 environment and has firmly established self-reliance in that class of radar. The radar can be carried in three man-packs.

The radar is a simple, easy to use and user-friendly surveillance e-sensor, in that an Infantry soldier can install and effectively put the radar into operation within five minutes. It has been built to be a reliable surveillance and tracking radar to search a specific sector to detect and perform track while scan for multiple targets like crawling man, single / group of walking men, light / heavy vehicles. Audio and visual aids help identify and classify a target. The radar is also a potential ground based e-sensor for Border Security Force, Coast Guard and Police for surveillance of designated areas. The radar would be a very cost-effective perimeter surveillance sensor for airports, large industrial and other infrastructure.

Users : Indian Army and BSF

Status : The system has been inducted into Service.

d. 3D Surveillance Radar for Indian Air Force – Rohini

The 3D Surveillance Radar, Rohini is a ground based mechanically scanning, pulse Doppler radar for air space surveillance to detect and track air targets with reliability, even under hostile EW operational environment. The radar has advanced technologies like digital receiver, and programmable signal processor providing high resolution, accuracy, response and information availability. The advanced software algorithms, multiple high speed processors, and state-of-the-art digital technologies have made the radar an effective but user friendly sensor providing 24 x 7 airspace awareness to the Commanders during peace and war time.

User : Indian Air Force

Status : In Operational use with Airforce.

e. 3D Surveillance Radar for Indian Navy – Revathi

3D Surveillance Radar, Revathi is a ship borne mechanically scanning pulse Doppler radar for 3D air space and sea surface surveillance. The radar is capable of providing reliable detection/tracking air targets and sea surface targets even under hostile EW operational environment. The radar is a state-of-art technology. The flexible architecture system is a reliable and adaptable, for multiple applications – early warning for air and sea surface defence weapon system, defence sensor onboard ship. The radar has advanced technologies like multiple simultaneous on receive, digital receiver, programmable signal processor providing high resolution, accuracy, response and information availability.

User : Indian Navy

Status : In Operational use with Indian Navy

f. Akash Weapon System for Indian Army and Indian Air Force

It is the primary sensor at the battery level for Akash surface to air missile weapon system which is an air defence system for the Indian Army and Air force. The radar has the capability to perform extensive search, track multiple targets and missiles, and to command and guide own multiple missiles concurrently. The multi functionRajendra replaces multiple radar requirements like surveillance, tracking and guidance. The radar supports autonomous and group mode operations of Akash weapon system.The Radar system is configured on two vehicles – Sensor vehicle and Command post. For Air Force it is configured on trailor with prime movers and for Army it is on Tatra high mobility vehicles.

Users : Indian Air Force and Indian Army
Status : In Operational use with Airforce and Indian Army.

g. Weapon Locating Radar (WLR)

WLR is a coherent, electronically scanned phased array radar. The radar automatically locates hostile artillery, mortars and rocket launchers and tracks friendly fire to locate the impact point of friendly artillery fire to issue necessary corrections. The radar is designed to detect projectiles with small cross section across the battle space horizon, and has the capability to handle simultaneous fire from weapons deployed at multiple locations. The fence concept of placing the beam grazing the covered air space makes it difficult for hostile projectiles to escape without detection. The radar helps neutralize hostile guns in the tactical battle space and helps own guns for effective shelling on designated enemy targets.

The radar has been developed for Indian Army to substitute the imported system and acts as a force multiplier for Artillery.

User : Indian Army
Status : Orders placed by Army on Production Agency.

h. Low Level Light Weight Radar (LLLR) for Army Air Defence-Bharani Mk I

Low Level Light Weight Radar is a light weight, battery powered and compact sensor, mounted on a quadripod, which provides 2D surveillance solution to alert Army Air Defence Weapon Systems mainly in mountainous terrain against hostile aerial targets like UAVs, RPVs, helicopters and fixed wing aircraft flying at low and medium altitudes. The radar can be transported by vehicles, animal transport or group of men or as heli-slung loads. It can be dismantled into packages to facilitate quick installation and re-location in mountainous terrain. It will act as an early warning provider to air defence weapon systems employed to provide protection to vulnerable areas or vulnerable points in the mountains by the Indian Army.

User : Army Air Defence

Status : In Operational use with Indian Army

i. 3D Low Level Light Weight Radar – Aslesha Mk I

It is a multi-faceted ground based 3D low level light weight surveillance radar for deployment in diverse terrains, like plains, deserts, mountains, and high altitude regions. It can detect and track heterogeneous air targets, including helicopters, fighters and UAVs at low and medium altitudes. It provides accurate range, azimuth and height information for each target with electronically steerable multi-beam technology in elevation.

User : Indian Air Force

Status : In Operational use with Air Force

j. 3D Tactical Control Radar (3D TCR)

The 3D Tactical Control Radar (TCR) is a stand-alone medium range, all weather 3D surveillance Radar for detection and identification of aerial targets, transmission of pertinent data to Target Data Receiver (TDR). The radar is capable of Track-While-Scan (TWS) of airborne targets for fighter, subject to line-of-sight clearance and radar horizon. The antenna is mechanically rotated in azimuth to provide 360 deg, all around, coverage. The Radar is a state of art technology with highly optimized structure in terms of accuracy and weight together mounted on a TATRA VVL.

User : Indian Navy

Status : User associated trials completed.

k. Maritime Airborne Patrol Radar (XV 2004)

XV 2004 is a coherent, multi-mode, pulse-compression, surveillance Radar System that can search and detect sea surface and airborne targets. The System’s design features help minimise effects of rain and sea clutter on Radar performance. The Radar has additional weather and beacon modes. The system has been developed for maritime patrol on Naval Advanced Light Helicopter and can be fitted on fixed wing platforms as well. The multi platform portable radar has the potential for use by all the three Services and Coast Guard and has established airborne radar technology in the country.

User : Indian Army

Status : Under Induction

Major Technologies

LRDE has developed many advanced radar technologies including transmit and receive modules, slotted waveguide array antennas, microstrip array antennas, multibeam antennas, high power transmitters, high purity signal sources, high bandwidth waveform generation systems, programmable signal and data processors and radar controllers. The technologies include

Antenna Technology:

LRDE has the expertise in developing various types of antenna for different applications.

  • Reflector Antenna : It has a doubly Curved profile with high Gain and broad bandwidth. It is segmented in small sizes for man/mule transportability for deployment in mountainous terrain.
  • Slotted Wave Guide Antenna : It gives a rugged structure with low SLL. Low loss, light weight and high gain. Slotted Wave Guide antenna are developed for various bands and applications.
  • Microstrip Patch Antenna : It is a low profile and light weight antenna with superior electrical performance in terms of its bandwidth and pattern characteristics. It is easy to integrate with MMICs and capable of dual and triple frequency operations.
  • Multi-Beam Antenna : It generates different types of beam from same aperture with more volumetric coverage. Very Low Side Lobe pencil beams in azimuth and simultaneously multiple beams during Rx mode and shaped beam for required volumetric illumination in Tx mode.
  • Passive Phased Arrays : It has individual radiators with integrated Phase Control Module, distributed architecture, efficient scan coverage, beam agility and high reliability.
  • Active Phased Arrays : It has integrated radiators with integrated TRM with solid state technology, distributed architecture, efficient scan coverage and high reliability.
  • Silicon (SI) LDMOS based TRM : Frequency of operation upto C-Band, power output upto 500 W and Class-AB operation.
  • Gallium Arsenide (GaAs) based TRM : Frequency of Operation upto Ku-Band, Power output upto 20 W and Class-AB operation.

Exciter / Transmitter / Receiver:

  • Exciter : Frequency Band L to Ku Band with 2 GHz RF Band Width, Programmable frequency spots and Waveforms. Wave form band width from 5 MHz to 800 MHz.
  • Transmitter : Bands from S to Ka, CFA, Klystron, TWT devices.

Mechanical Engineering :

  • Design & devoplment of Antenna Sub Assemblies, Antenna Assemblies and Pedestals

Power Systems:

  • DG Sets, UPS & Power Distribution : DG Sets : 2 KW to 1500 KW, UPS : Static : 400 KW, Diesel Rotary : 1200 KW, Power Distribution : AC : 20 amps to 2000 amps, DC : 50 amps to 750 amps and Power Supplies : 2 KW to 25 KW

Algorithms & Functionalities

  • Signal Processing

    • Digital Pulse Compression
    • MTI
    • CFAR
    • Clutter Map
    • ZVF
    • Binary Integration
    • Centroiding (Doppler, Range, Az, Elevation)
    • Jamming Analysis
    • Monopulse Computation
    • SLB / SLC
    • k
    • Clutter Doppler Estimation
    • Ambiguity Resolution
  • Data Processing
    • IMM
    • GNN with Munkers Algorithms
    • LMS
  • Image Processing
    • Change Detection
    • Image Segmentation
    • Moving Average Subtraction
    • Image Enhancements
    • Geometric Corrections
    • Speckle Removal
    • Migration Correction
    • ISAR
  • Platform Motion Estimation & Compensation
  • Platform Stabilization
  • Radar Computer/ Resource Management
    • Surveillance
    • Tracking
    • IFF Tracking
    • Target Classification
    • Multi Sensor Data Fusion
    • Networking of Radars
  • Weapon System
    • Cued Acquisition
    • Threat Evaluation
    • Weapon Control
    • Weapon Guidance
    • Kill Assessment
  • Weapon Location & Fire Direction
    • Trajectory Computation
    • LP& IP Computation

Coming Soon