WWW: World Without WiresManasvee SarafSakshiShettyShreyaPatrawalaSnehaShastri
Wireless World!The term "wireless" hasbecome a generic and all encompassingword used to describe communicationsin which ectromagneticwaves orRadio Frequency (rather thansome form of wire) carries asignal over part or the entirecommunication path.
WirelessCommunicationso Wireless communicationmay be used to transferinformation over:• short distances (a few meters as intelevision remote control)• or long distances (thousands ormillions of kilometers for radiocommunications).o It includes various types of• fixed,• mobile,• and portabletwo-way radios, cellulartelephones, personal digitalassistants (PDAs), andwireless networking.
Wireless Technologyo Other examples of wirelesstechnologyinclude• GPS units,• garage door openers,• wireless computer mice,keyboards and headsets,• satellite television and• cordless telephones.
How is the information transferred? Wireless operations permits services, such as long rangecommunications, that are impossible or impractical to implement withthe use of wires. Telecommunications systems:• radio transmitters andreceivers,• remote controls,• computer networks,• network terminals, etc. They use some form of energy• Radio frequency (RF),• Infrared light,• Microwave communication,• Laser light,• Visible light,• Acoustic energy, etc.to transfer information without theuse of wires.
Types of Wireless Communications:• point-to-point communication:from one location to the other• point-to-multipointcommunication: from a singlelocation to multiple locations• Broadcasting: from one locationto all locations simultaneously• cellular networks: this networksallows the user to wander aboutany where in the country andstay connected• other wireless networks.Broadcasting Antenna
The use of a wireless network:• To span a distance beyond the capabilities of typical cabling,• To provide a backup communications link in case of normalnetwork failure,• To link portable or temporary workstations,• To overcome situations where normal cabling is difficult orfinancially impractical,• to remotely connect mobile users or networks.• to connect laptop users who travel from location to location.• for mobile networks that connect via satellite.• to network a LAN segment that must frequently change locations• Wireless technology may supplement or replace hard wiredimplementations in security systems for homes or officebuildings.
• Wi-Fi is a wireless local area network that enablesportable computing devices to connect easily to theInternet.• Cell phones use radio waves to enable the operatorto make phone calls from many locationsworldwide
Wireless Local AreaNetworkWireless LANA wireless local areanetwork (WLAN)links two or moredevices using somewireless distributionmethod, and usuallyproviding a connectionthrough an access pointto the wider internet.This gives users themobility to movearound within a localcoverage area and stillbe connected to thenetwork.
BluetoothBluetoothis aproprietary openwireless technologystandard for exchangingdata over shortdistances (using shortwavelength radiotransmissions) fromfixed and mobiledevices, creatingpersonal area networks(PANs) with high levelsof security.
What can we use instead of our devicechargers?Wireless energytransferWireless energy transferis a process wherebyelectrical energy istransmitted from apower source to anelectrical load that doesnot have a built-inpower source, withoutthe use ofinterconnecting wires.