17
1 We lcome Welcome … Our topic Our topic is- is- Impact of waves on Wireless Impact of waves on Wireless Communication Communication To Our.. To Our.. Presentation. Presentation.

wirelesscommunicationbywaves-131211023426-phpapp01

Embed Size (px)

DESCRIPTION

Transmitting voice and data using electromagnetic waves in open space (atmosphere) Electromagnetic Waves - Travel at speed of light (c=3*10^8 m/s) -Higher frequency means higher energy photons. -The higher the energy photon the more penetrating is the radiation.

Citation preview

Page 1: wirelesscommunicationbywaves-131211023426-phpapp01

1

Welcome …

Welcome …

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: wirelesscommunicationbywaves-131211023426-phpapp01

22

Submitted BySubmitted By Group=‘‘Group=‘‘STARSSTARS””

• Sheikh Mohammad Shahnoor-12410224

• Abdur Rahim Bhuyian- 12410206

• MD Hanif Sardar- 12310426

Page 3: wirelesscommunicationbywaves-131211023426-phpapp01

33

What is wireless What is wireless Communication?Communication?

Transmitting voice and data using Transmitting voice and data using electromagnetic waves in open electromagnetic waves in open space (atmosphere) space (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 -Higher frequency means higher energy

photons.photons. -The higher the energy photon the more -The higher the energy photon the more

penetrating is the radiation.penetrating is the radiation.

Page 4: wirelesscommunicationbywaves-131211023426-phpapp01

44

Types Of wireless communicationTypes Of wireless communication::

Point to point-Point to point-

Multi-point -Multi-point -

BroadcastBroadcast

Page 5: wirelesscommunicationbywaves-131211023426-phpapp01

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: wirelesscommunicationbywaves-131211023426-phpapp01

66

Picture of the 3 communicative Waves

Page 7: wirelesscommunicationbywaves-131211023426-phpapp01

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: wirelesscommunicationbywaves-131211023426-phpapp01

88

radio wave radio wave

Page 9: wirelesscommunicationbywaves-131211023426-phpapp01

9

How are radio waves produced?

- Radio waves are produced by Passing an oscillating electric current through along wire called an aerial.

-The frequency of the radio wave produced is the same as the frequency of the oscillating current.

Page 10: wirelesscommunicationbywaves-131211023426-phpapp01

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: wirelesscommunicationbywaves-131211023426-phpapp01

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: wirelesscommunicationbywaves-131211023426-phpapp01

1212

Micro WAVE signal

Page 13: wirelesscommunicationbywaves-131211023426-phpapp01

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: wirelesscommunicationbywaves-131211023426-phpapp01

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: wirelesscommunicationbywaves-131211023426-phpapp01

1515

Infrared WavesInfrared Waves

Page 16: wirelesscommunicationbywaves-131211023426-phpapp01

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: wirelesscommunicationbywaves-131211023426-phpapp01

17