This document provides information about Bharat Electronics Limited (BEL), an Indian public sector undertaking. It discusses BEL's establishment, manufacturing units, product ranges including radar systems and communications equipment. Specific details are given about the Ghaziabad unit, its departments under rotation program like testing equipment automation and magnetics lab. An introduction to radar technology is provided along with the basic radar system and equation. The document focuses on BEL's SRE radar project, describing the radar electronic cabinet and briefly outlining the radar subsystem and its applications.

1. BHARAT
ELECTRONICS
LIMITED(BEL)
PROJECT
ON
SRE RADAR

2. Introduction To BEL
 established in 1954 as a Public Sector Enterprise
 it is the defence organisation.
has 8 manufacturer units
product ranges like Defense Communication, Radar's, Optical &
Opto-electronics, etc.
 Established its own electron valve manufacturing facility
 has nurtured and built a strong in-house R&D base.
 Each unit has its own R&D Division to bring out new products.
 About 70% of BEL's products are of in-house design.
 BEL has won a number of national and international awards for
Productivity, Quality,etc.

3. Manufacturer units
 Bangalore (Karnataka)
 Ghaziabad (Uttar Pradesh)
Pune (Maharashtra)
 Machilipatnam (Andhra Pradesh)
 Chennai (Tamil Nadu)
Kotdwar (Uttar Pradesh)
Taloja (Maharashtra)
 Hyderabad (Andhra Pradesh)

4. BEL GHAZIABAD UNIT
 established in 1974 .
Second largest unit at ghaziabad.
Manufacture special type of radar for ADGES.
 also provide comm. Systems to the defence forces.
 microwave communication links to the various department of
state and central gov.
 has its own water treatment and harassing plant

5. PRODUCT RANGES
 RADAR SYSTEM
 Mobile Radar for the Air Force
 Tactical Control Radar System for the Army
 Battlefield Surveillance Rader for the Army
 COMMUNICATIONS
 VHF, UHF & Microwave Communication Equipment
 Static and Mobile Satellite Communication Systems for Defence
 ANTENNA
 Antennae for Radar, Terrestrial
Antennae for Line-of-sight Microwave Communication Systems
 MICROWAVE COMPONENT
 Active Microwave components
Passive Microwave components

6. DEPARTMENTS UNDER
ROTATION PROGRAM
1. Test Equipment and Automation
2. P.C.B. Fabrication
3. Quality Control Works-Radar
4. Work Assembly-Communication
5. Magnetic
6. Microwave lab

7. TESTING EQUIPMENT AND AUTOMATION LAB
It compromises of two labs
1. Calibration lab:- Some component in this lab are
Function generator
 analog multimeter
 Digital multimeter
 comparator
Signal generator
 spectrum analyzer
 square wave generator

8. 2.Testing & Maintenance lab:-
The major section of this lab are:
 power supply repairing
CRO
Component testing
Function generator maintenance section

9. Works assembly lab
main function is to assemble various components,
equipment’s and instruments
Has two section:
1.PCB assembly:-
 hand soldering
Wave soldering

10. PCB FABRICATION
Types of PCBS:
1. Single sided board-
ckt on on side
2. Double sided board-
ckt. On both sides
3. multi-layer board-
several layer are interconnected

11. MAGNETICS LAB
basically deals with the production of the components of
Electrical Engineering such as:
 Core of transformer
 Core winding
Types of transformer:
Air core transformer
Oil core transformer
E shaped coil
Square coil

12. 1. E- type
2. C-type
3. POT core
4. Ferrite core
Types of core:
1. 2. 3.

13. INTRODUCTION OF RADAR
( ra d i o d e t e c t i o n a n d ra n g i n g )
 Radar is a system that uses radio waves to detect, determine
the distance or speed of object.
Principle: doppler effect
Basic radar sends EM wave which is received after reflecting from
taget and processed to determine speed & distance of object.

14. BASIC RADAR SYSTEM:

15. RADAR EQUATION
Pr= received power
Pt=transmitted power
G= gain of transmitted anteena
Ar= effective aperture of receiving antenna
σ = scattering cofficient
F= pattern propagation factor

16. TYPES OF RADAR
Based on RADAR function
1.Primary or simple RADAR
2.Secondary RADAR

17. SRE
Radar electronic cabinet
 power supply
 RF exciter
 IF receiver assembly
 SLB function
 front end receiver
 waveguide switch
 RADAR signal processor

18. RADAR ELECTRONIC CABINET
OF SRE

19. BRIEF DESCRIPTION OF THE RADAR
SUBSYSTEM
Main Circuit of Radar Subsystem
Transmitter unit.
Receiver unit.
Antenna.
Signal processors display.

20. APPLICATION OF SRE
Air traffic control uses radar to track planes both
on the ground and in the air, and also to guide planes in
for smooth landings.
Police use it to detect the speed of passing motorists.
NASA uses radar to map the Earth and other planets, to
track satellites and space debris and to help with things
like docking and maneuvering.
The military uses it to detect the enemy and to guide weapons.

21. NITIN KUMAR
EC 7th A
0713331057