Wireless communication by waves
-
Upload
sm-shahnoor -
Category
Technology
-
view
1.589 -
download
4
Transcript of Wireless communication by waves
![Page 1: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/1.jpg)
1
Welcom
e …
Welcom
e …
Our topic Our topic is-is-Impact of waves on Wireless Impact of waves on Wireless Communication Communication
To Our..To Our.. Presentation.
Presentation.
![Page 2: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/2.jpg)
22
Submitted BySubmitted By Group=‘‘Group=‘‘STARSSTARS””
• Sheikh Mohammad Shahnoor-12410224
• Abdur Rahim Bhuyian- 12410206
• MD Hanif Sardar- 12310426
![Page 3: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/3.jpg)
33
What is wireless Communication?What is wireless Communication?
Transmitting voice and data using Transmitting voice and data using electromagnetic waves in open space electromagnetic waves in open space (atmosphere) (atmosphere)
Electromagnetic WavesElectromagnetic Waves - - Travel at speed of light (c=3*10^8Travel at speed of light (c=3*10^8 m/s)m/s) -Higher frequency means higher energy photons.-Higher frequency means higher energy photons. -The higher the energy photon the more penetrating -The higher the energy photon the more penetrating
is the radiation.is the radiation.
![Page 4: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/4.jpg)
44
Types Of wireless communicationTypes Of wireless communication::
Point to point-Point to point-
Mult i-point -Mult i-point -
BroadcastBroadcast
![Page 5: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/5.jpg)
55
Basic Waves involved in communicationBasic Waves involved in communication
The 3 basic waves areThe 3 basic waves are --Radio WavesRadio Waves
-Infrared Waves--Infrared Waves-
--Micro WavesMicro Waves
![Page 6: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/6.jpg)
66
Picture of the 3 communicative Waves
![Page 7: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/7.jpg)
77
How waves help in mobile communicationHow waves help in mobile communication
1.RADIO WAVE-1.RADIO WAVE-The broadcast of every radio and television programme involves the use of radio waves.
.Radio waves are the type of electromagnetic waves with the longest wavelengths
micro-wavesradio waves infrared
1000 m 1 mm1 m 0.001 mm
ultra-violet
wavelength of electromagnetic waves
![Page 8: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/8.jpg)
88
radio wave radio wave
![Page 9: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/9.jpg)
9
How are radio waves produced?
- Radio waves are produced
by Passing an oscillating
electric current through a
long wire called an aerial.
-The frequency of the
radio wave produced is
the same as the
frequency of the
oscillating current.
![Page 10: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/10.jpg)
10
MICRO WAVE-
2.Every mobile phone conversation involves the transmission of microwave signals.
-The wavelength of microwaves ranges from 30 cm (the length of a standard ruler) to 1 mm (about the size of a full stop).
Micro waves are widely used for one to one communication between sender and receiver, cellular phone, satellite networks and in wireless LANs
![Page 11: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/11.jpg)
1111
How microwave produced?How microwave produced?
Long-wavelength microwaves are produced by aerials in a similar way to other radio waves. These types of microwaves are used for communications.
Short-wavelength microwaves are produced using a device called a magnetron.
![Page 12: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/12.jpg)
1212
Micro WAVE signal
![Page 13: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/13.jpg)
13
3. Infrared WAVEInfrared radiation is a form of electromagnetic radiation that lies between microwaves and visible light on the electromagnetic spectrum.
Electromagnetic waves having frequencies from 300 GHz to 400 THz are also called IR waves or Infrared waves.It also use in optical fibre as well.
![Page 14: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/14.jpg)
14
How it is transmitted?
IR waves are used for short range communication and use line of sight propagation.
Infrared waves cannot pass through solid objects, like walls and be easily contained in a room.
They are cheap, easy to build and do not require any government license to use them.
IR waves offer very bandwidth for use.
![Page 15: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/15.jpg)
1515
Infrared WavesInfrared Waves
![Page 16: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/16.jpg)
16
Effects !
Radiofrequency Ranges (10 kHz to 300 GHz)
Effects only possible at ten times the permissible exposure limit
Heating of the body (thermal effect) Cataracts Some studies show effects of teratoginicity
and carcinogenicity. -Reduces fertility in male
![Page 17: Wireless communication by waves](https://reader034.fdocuments.us/reader034/viewer/2022050614/58a253aa1a28abe8738b62d1/html5/thumbnails/17.jpg)
17