this presentation is about wireless communication.

1. Topic: Wireless communication
technology.

2.  Definition of wireless communication .
 Types of wireless communication technology.
 Applications.
 Limitation .
 Advantage
 Disadvantage.
 Overall overcome.

3. Wireless communication is among technology’s
biggest contributions to mankind. Wireless
communication involves the transmission of
information over a distance without help of wires,
cables or any other forms of electrical conductors.
The transmitted distance can be anywhere between
a few meters (for example, a television’s remote
control) and thousands of kilometers (for example,
radio communication).

4. The different types of wireless communication
mainly include,
 Infrared (IR) wireless communication.
satellite communication.
broadcast radio communication system.
Microwave wireless communication.
Wi-Fi & Bluetooth.

5. Infrared band of the electromagnet corresponds to 430THz
to 300GHz and a wavelength of 980nm. The propagation of
light waves in this band can be used for a communication
system (for transmission and reception) of data. This
communication can be between two portable devices or
between a portable device and a fixed device.

6. A communication satellite is an artificial satellite used
specifically as a communication transmitter/receiver in orbit.
It behaves like a radio relay station above the earth to
receive, amplify, and redirect analog and digital signals
carried on a specific radio frequency.
Advances in satellite technology have given rise to a healthy
satellite services sector that provides various services that
satellites provide: telecommunications, broadcasting, and data
communications. US launched the first GEO satellite, Relay-1 in
1962.

8. Satellite communication

9. Basically an audio broadcasting service, radio broadcasts sound
through the air as radio waves. It uses a transmitter to transmit radio
waves to a receiving antenna. Radio broadcasting can also be done
via cable FM, the internet and satellites. A radio broadcast sends
data over long distances (across countries) at up to 2 megabits per
second (AM/FM Radio).

10. Microwave transmission involves the transfer of voice
and data through the atmosphere as super high-
frequency radio waves called microwaves. Microwave
transmission is mainly used to transmit messages
between ground-based stations and satellite
communications systems.

12. Wi-Fi: Wi-Fi is a popular
wireless networking
technology. Wi-Fi stands for
“wireless fidelity”. The Wi-
Fi was invented by NCR
corporation/AT&T in
Netherlands in 1991. By
using this technology we
can exchange the
information between two or
more devices.

13. Bluetooth is a wireless technology
standard for exchanging data over
short distances (using short-
wavelength UHF radio waves)
between two device for personal
area network. Invented by telecom
vendor Ericsson in 1994.
For example mobile Bluetooth
headphone.

14. Television Remote Control – Modern televisions use wireless
remote control. Currently radio waves are also used.
Wi-Fi – This is a wireless local area network that establishes internet
connection with the portable computers.
Security systems – For homes and office buildings, hard wired
implementation security systems are replaced by the Wireless
technology.
Cellular Telephone – Radio waves are used to facilitate the operator
to make phone calls from any place on the earth. GSM, and 3G are
examples of the advancement made by wireless communication in the
world.
Wireless energy transfer – A process where a power source
transmits electrical energy to electrical load which does not have
built-in power source wirelessly

15. Computer Interface Devices – Computer hardware
manufacturers had realized that having so many wires to
communicate between devices would confuse the consumer. So
they switched to wireless technology to facilitate their
consumers, thus making it easy to mediate between a computer
and other peripherals including mouse and keyboard.

18. When the wireless signals are transferred sometime signal
are blocked by the certain obstacles as walls, gates and
other material.
wireless technology does not provide the same bandwidth
guarantees as a wired connection; in fact the bandwidth is
substantially more limited than a wired connection, and is
additionally shared with other users who are connected to
the same access point. so user sometime not get original
data information.

19. Flexibility: The internet can be accessed from anywhere
without any wire connection.
Easy to use: we can setup and connected device easily also
transfer data & information.
Any data or information can be transmitted faster and
with a high speed
Maintenance and installation is less cost for these
networks.
More user supported - cable device have limited slots
whereas wireless does not.

20. An unauthorized person can easily capture the wireless signals
which spread through the air.
Wi-Fi generates radiations which can harm the human health.
There are some limits to transfer the data, we cant able to
transfer the data for long distance.
Wi-Fi implementation is very expensive when compared to the
wired connection.

21. Wireless communication is play a major role in the world wide
communication. now a day we can not think without wireless
communication so it is very important in our modern society.
For example, Doctors will be able to monitor and handling his
patients who are thousands of miles using by wireless
communication.