MILITARY RADARSPRESENTED BY D.NARESH This will result in an increased effectiveness of the combined combat operations. altering along with weapon control functions.INTRODUCTION Military radar should be an early warning. It is specially designed to be highly mobile and should be such that it can be deployed within minutes. . Military radar minimizes mutual interference of tasks of both air defenders and friendly air space users. The command and control capabilities of the radar in combination with an effective ground based air defense provide maximum operational effectiveness with a safe. efficient and flexible use of the air space. . The increased operational effectiveness is obtained by combining the advantages of centralized air defense management with decentralized air defense control. .FUNCTIONAL DESCRIPTION OF RADAR SUBSYSTEM SUBSYSTEM The detection of air targets is accomplished by the search radar. The color PPI unit provides the presentation of all moving targets down to very low radial speeds on a PPI screen. the video processor and the color PPI unit. Block Diagram . Transmitter Unit: Modulator Magnetron Sub Modulator AFC Control unit. VIDEO PROCESSOR . 2. ANTENNA 3.BLOCKS 1. LO+AFC UNIT: Lock Pulse Mixer AFC Discriminator Solid State Local Oscillator (SSLO) Coherent Oscillator (COHO) .BLOCKS 4. RECEIVER UNIT Broadband jamming detector (BJD). Image Rejection Mixer IF Preamplifier MTI Main Amplifier Linear detector Linear main amplifier Phase Sensitive Detector (PSD).BLOCKS 5. . Detected target can be assigned with the joystick controlled order marker to initiate target tracking. The system computer in the processor unit processes data on this tracked target. . Target tracking is started and a track marker appears over the target echo. which presents only moving targets in the normal mode (MTI-MODE). A label is displayed near the track marker.OPERATING THE RADAR The operator’s main task is to watch the PPI (Plan Position Indicator) display. When an aircraft does not respond to the IFF interrogation it is considered to be unknown. Short and fast reaction time between target detection and ready to fire moment.ADVANCED FEATURES AND BENEFITS Multiple target handling and engagement capability. Highly mobile system. Easy to operate and hence low manning requirements and stress reduction under severe conditions. which gives excellent target discrimination and accurate tracking. High resolution. All-weather day and night capability. to be used in all kind of terrain. . Radar can take up to 2 seconds to lock on Radar has wide beam spread (50 ft diameter over 200 ft range). . Hand-held modulation can falsify readings.DISADVANTAGES Time . Cannot track if deceleration is greater than one mph/second. Large targets close to radar can saturate receiver. Radar system discussed here has a built in threat evaluation program which automatically puts the target in a threat sequence.CONCLUSION Military radars are one of the most important requirements during the wartime. which can be used for early detection of ballistic missile and also for accurate target detection and firing. . and advises the weapon crew which target can be engaged first. Davis Fourth Edition. ‘Electronic Communication Systems’ by Kennedy.REFERENCES 1) 2) 3) 4) Skolnik ‘Introduction to Radar Systems’ McGraw Hill.com Various other internet sites and journals .belindia. Bharat Electronics Limited website www.