The document discusses the application of radar waves and antennas. It defines radar as using radio waves to detect objects, and an antenna as a device that transmits or receives electromagnetic waves. It then describes how radar works using an antenna to transmit radio waves that bounce off objects and return to the antenna and receiver. It lists five main applications of radar: military uses, air traffic control, weather observation, remote sensing, and ground traffic control. It also discusses common types of antennas used for ultra-high frequency and very-high frequency communications and extremely low frequency systems. Advantages and disadvantages of radar are provided.

1. Application Of Radar Wave In Antenna

2. Group Members :
Shishir Karmoker 2016-2-55-
008
Md. Nahid Ahosan 2016-2-55-
011
Md. Arif Shariyar 2016-2-50-
036

3. What Is Radar Wave And Antenna
?

4. Radar Wave
The word Radar was formed from the
first letters of the term Radio Detection
and Ranging .
 Radar wave are actually Radio wave
It have frequencies as high as 300
GHz to as low as 3 kHz
Like all other electromagnetic waves,
they travel at the speed of light.

5. Antenna
Converts Electric Energy into
Radio Waves, and vice versa.
A Device for Sending or
Receiving Electromagnetic
Waves.
It is Usually Used with a Radio
transmitter or radio receiver

6. Relation Between Radar And
Antenna

7. Antenna is a part of the radar

8. How does radar
work? Duplexer switches magnetron through to antenna.
 Antenna acts as transmitter, sending narrow beam of radio waves through the air.
 Radio waves hit enemy airplane and reflect back.
 Antenna picks up reflected waves during a break between transmissions
 Duplexer switches antenna through to receiver unit.
 Computer in receiver unit processes reflected waves and draws them on a TV screen

9. Application Of Radar Wave

10. RADAR Applications In 5 Arears
Military Applications:
• In air defense it is used for target detection,
target recognition and weapon control
•In missile system to guide the weapon.
•Identifying enemy locations in map.
Air Traffic Control:
•To control air traffic near airports. The Air
Surveillance RADAR is used to detect and display
the aircraft’s position in the airport terminals.
•To guide the aircraft to land in bad weather using
Precision Approach RADAR.
•To scan the airport surface for aircraft and ground
vehicle positions

11. RADAR can be used for observing weather or
observing planetary positions and monitoring
sea ice to ensure smooth route for ships.
Remote Sensing:
Ground Traffic Control:
RADAR can also be used by traffic police to determine
speed of the vehicle, controlling the movement of vehicles
by giving warnings about presence of other vehicles or any
other obstacles behind them.
Space:
 To guide the space vehicle for
safe landing on moon
 To observe the planetary
systems
 To detect and track satellites
 To monitor the meteors

12. Application Of Antenna

13. UHF and VHF
Antennas
Ultra High Frequency /Very High Frequency
Receiving Antenna
Providers deployed voice and data
cellular
Spectrum used for land mobile system
Broadcasting fulfilled the demand
networks.

14. Extremely Low Frequency ( ELF )
System
Operates at 76 Hz
Schumann resonances

15. Wireless Communications
¼ Wave
Helical
¼ Wave 2-in-
1
¼ Wave
Whip

16. Advantages & Disadvantages Of RADAR

17. Advantages
RADAR can penetrate mediums such as clouds, fogs, mist and
snow
RADAR signal can penetrate insulators.
It can give the exact position of an object.
It can determine the velocity of a target.
It allows for 3D Imaging based on the various angles of return.
Cheap and fast method of calculating base maps when no
detailed survey is required.

18. Disadvantages
RADAR takes more time to lock on an object.
RADAR has a wider beam range (Over 50ft Diameter).
It cannot track if an object is decelerating at more the 1mph/s.
It cannot distinguish or resolve multiple targets.
It cannot resolve targets that are obstructed by a conducting material.
It is not very accurate.