PRESNTED BY RAGHWENDRA KUSHWAHA B.TECH (ECE)

F.I.T ENGG. COLLEGE MERRUT

INDUSTRIAL TRAINING AT

BHARAT ELECTRONICS LTD. GZB

ABOUT BEL

Bharat Electronics Limited (BEL) was established in 1954 as a public Sector Enterprise under the administrative control of Ministry of Defence.

It manufactures advanced electronic products for the defense.

BEL was among the first Indian companies to manufacture computer parts and peripherals under arrangement with International Computers India Limited (ICIL) in 1970s.

It has total employee strength of about 12000 people spread across 9 manufacturing units, and few regional offices.

MANUFACTURING UNITS BANGALORE (KANARATAKA) – 1954

GHAZIABAD (UTTER PRADESH)– 1974

PUNE (MAHARASHTRA)– 1979

MACHILIPATNAM (ANDHRA PRADESH– 1983

PANCHKULA (HARYANA)– 1985

CHENNAI (TAMIL NADU)– 1985

KOTDWARA (UTTER PRADESH)– 1986

TALOJA (MAHARASHTRA)– 1986

HYDERABAD (ANDHRA PRADESH)– 1986

PRODUCT RANGES

RADAR SYSTEMS

3-Dimensional High Power Static and Mobile Radar for the Air Force.

Low Flying Detection Radar for both the Army and the Air force.

Tactical Control Radar System for the Army.

Battlefield Surveillance Rader for the Army.

IFF Mk-X Radar systems for the Defence and export.

ASR/MSSR systems for Civil Aviation.

Radar & allied systems Data Processing Systems.

COMMUNICATIONS

Digital Static Tropo scatters Communication Systems for the Air

Force.

Digital Mobile Tropo scatters communication System for the Air

Force and Army.

VHF, UHF & Microwave Communication Equipment.

Bulk Encryption Equipment.

Turnkey communication Systems Projects for Defence & civil users.

Static and Mobile Satellite Communication Systems for Defence.

Telemetry /Tele-control Systems.

ANTENNA Antennae for Radar, Terrestrial & Satellite Communication Systems.

Antennae for TV Satellite Receive and Broadcast applications.

Antennae for Line-of-sight Microwave Communication Systems.

MICROWAVE COMPONENT Active Microwave components like LNAs, Synthesizer, and

Receivers etc.

Passive Microwave components like Double Balanced Mixers,

etc.

SERVICES OF BHARAT ELECTRONICS LIMITED (BEL):- DEFENCE PRODUCTS:-

Naval System

Military Communication Equipment

Radars

Tele Communication & Broadcasting Services

Opto Electronics

Electronic Warfare

Tank Electronics

NON-DEFENCE PRODUCTS:-

Electronic Voting Machine

Solar Products

Simputer

DTH

ROTATION PROGRAMUnder this students are introduced to the company by putting them under a rotation

program to various departments. The several departments where I had gone under my

rotational program are:

1. Test Equipment and Automation

2. P.C.B. Fabrication

3. Quality Control Works-Radar

4. Work Assembly- Communication

5. Magnetics

6. Microwave lab

 

Rotation period was to give us a brief insight of the company’s functioning and

knowledge of the various departments. A brief idea of the jobs done at the particular

departments was given. The cooperative staff at the various departments made the learning

process very interesting , which allowed me to know about the company in a very short time.

RADAR

The term RADAR was coined in 1941 as an acronym for

Radio Detection and Ranging. This acronym of American

origin replaced the previously used British abbreviation RDF

(Radio Direction Finding).

Echo is something you experience all the time. If you shout into a well or a canyon, the echo comes back a moment later. The echo occurs because some of the sound waves in your shout reflect off of a surface (either the water at the bottom of the well or the canyon wall on the far side) and travel back to your ears.

BASIC PRINCIPLE

Echo and Doppler Shift

Doppler shift is also common. You probably experience it daily (often without realizing it). Doppler shift occurs when sound is generated by, or reflected off of, a moving object. Doppler shift in the extreme creates sonic booms

Basic Radar System:

RADAR EQUATIONThe amount of power Pr returning to the receiving antenna is given by the radar equation:-

wherePt = transmitter power Gt = gain of the transmitting antenna Ar = effective aperture (area) of the receiving antenna σ = radar cross section, or scattering coefficient, of the target F = pattern propagation factor Rt = distance from the transmitter to the target Rr = distance from the target to the receiver.

RADAR SIGNAL PROCESSINGDistance measurementTransit time

RADAR TRANSMITTER

The radar transmitter produces the short duration high-power of pulses of energy that are radiated into space by the antenna. The radar transmitter is required to have the following technical and operating characteristics:

The transmitter must have the ability to generate the required mean RF power and the required peak power

The transmitter must have a suitable RF bandwidth.

The transmitter must have a high RF stability to meet signal processing requirements

The transmitter must be easily modulated to meet waveform design requirements.

The transmitter must be efficient, reliable and easy to maintain and the life expectancy and cost of the output device must be acceptable.

Picture: transmitter of P-37

An easy block diagram of a fully coherent radar

RADAR APPLICATIONS   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 radar 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.

THANK YOU

QUERIES???