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Wireless communicationsSystem using radio-frequency, infrared, microwave, or other types of electromagnetic or acoustic waves in place of wires, Wireless Communications, or fibre optics to transmit signals or data. Wireless devices include cell phone s, two-way radios, remote garage- door openers, television remote controls, and GPS receivers see Global Positioning System. Wireless modems, microwave transmitters, and satellites make it possible to access the Internet from anywhere in the world. Wireless communications Article Media Additional Info. Print Cite. Facebook Twitter. Give Feedback External Websites. Let us know if you have suggestions to Wireless Communications this article requires login. External Websites. The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree See Article History. This article was most recently revised and updated by William L. HoschAssociate Editor. Learn More in these related Britannica articles:. GPSspace-based radio-navigation system that broadcasts highly accurate navigation pulses to users on or near Earth. The development of affordable miniaturized wireless microphones in the s significantly improved vocal reinforcement. Wireless microphones send their signal to the mixing desk via a small low-power FM radio transmitter hidden Wireless Communications on the actor. Wireless Communications phonewireless telephone that permits telecommunication Wireless Communications a defined area that may include hundreds of square miles, using radio waves in the — megahertz MHz band. To implement a cell-phone system, a geographic area is broken into smaller areas, Wireless Communications cells, usually mapped as uniform…. History at your fingertips. Sign up here to see what happened On This Dayevery day in your inbox! Email address. By signing up, you agree to our Privacy Notice. Be on the lookout for your Wireless Communications newsletter to get trusted stories delivered right to your inbox. Wireless Communications in Vaughan ON | ™

Wireless communication or just wirelesswhen the context allows is the electromagnetic transfer of information between two or more points that Wireless Communications not connected by an electrical conductor. The most common wireless technologies use radio waves. With radio waves, intended distances can be short, such as a few meters for Bluetooth or as far as millions Wireless Communications kilometers for deep-space radio communications. It encompasses various types of fixed, mobile, Wireless Communications portable applications, including two-way radioscellular telephonespersonal digital assistants PDAsand wireless networking. Other Wireless Communications of applications of radio wireless technology include GPS units, garage door openerswireless computer mousekeyboards Wireless Communications headsetsheadphonesradio receiverssatellite televisionbroadcast television and cordless telephones. Somewhat less common methods of achieving wireless communications include the use of other electromagnetic wireless technologies, such as light, magnetic, or electric fields or the use of sound. The term wireless has been used twice in communications history, with slightly different meaning. It was initially used from about for the first radio transmitting and receiving technology, as Wireless Communications wireless telegraphyuntil the new word radio replaced it around Radios in the UK that were not portable continued to be referred to as wireless sets into the s. The term was revived in the s and s mainly to distinguish Wireless Communications devices that communicate without wires, such as the examples Wireless Communications in the previous paragraph, from those that require wires or cables. This became its primary usage in the s, due to Wireless Communications advent of technologies such Wireless Communications mobile broadbandWi-Fi and Bluetooth. Wireless operations permit services, such as mobile and interplanetary communications, that are impossible or impractical to implement with the use of wires. The term is commonly used in the telecommunications industry to refer to telecommunications systems e. The first wireless telephone conversation Wireless Communications inwhen Alexander Graham Bell and Charles Sumner Tainter invented the photophonea telephone that sent audio over a beam of light. The photophone required sunlight to operate, and a clear line of sight between transmitter and receiver. These factors greatly decreased the viability of the photophone in any practical use. It would be several decades before the photophone's principles found their first practical applications in military communications and later in fiber- optic communications. A number of wireless electrical Wireless Communications schemes including sending electric currents through water and the ground using electrostatic and electromagnetic induction were investigated for telegraphy in the late 19th century before practical radio Wireless Communications became available. These included a patented induction system by Thomas Edison allowing a telegraph on a running train to connect with telegraph wires running parallel to Wireless Communications tracks, Wireless Communications William Preece induction telegraph system for sending messages across bodies of water, and several operational and proposed telegraphy and voice earth conduction Wireless Communications. The Edison system was used by stranded trains during the Great Blizzard of and earth conductive systems found limited use between trenches during World War I but these systems were never successful economically. InGuglielmo Marconi began developing a wireless telegraph system using radio waveswhich had been known about since proof of their existence in by Heinrich Hertzbut discounted as a communication format since Wireless Communications seemed, at the time, to be Wireless Communications short range phenomenon. Marconi and Karl Ferdinand Braun were awarded the Nobel Prize for Physics for their contribution to this form of wireless telegraphy. The wireless revolution began in the s, [11] [12] [13] with the advent of digital wireless networks leading to a social revolution, and a paradigm Wireless Communications from wired to wireless technology, [14] including the proliferation of commercial wireless technologies such as cell phonesmobile telephonypagerswireless computer networks[11] cellular networksWireless Communications wireless InternetWireless Communications laptop and handheld computers with wireless connections. RF CMOS integrated circuits enabled sophisticated, low-cost and portable end-user terminals, and gave rise to small, low-cost, low-power and portable units for a wide range of wireless communication systems. This enabled "anytime, anywhere" communication and helped bring about the wireless revolution, leading to the rapid growth of the wireless industry. In recent years, an important contribution to the growth of wireless communication networks has been interference alignment, which was discovered by Syed Ali Jafar at the University of California, Irvine. Radio and microwave communication carry information by modulating properties of electromagnetic waves transmitted through space. Free-space optical communication FSO is an optical communication technology that uses light propagating in free space to transmit wirelessly data for telecommunications or computer networking. This contrasts with other communication technologies that use light beams Wireless Communications through transmission lines such as optical fiber or dielectric Wireless Communications pipes". The technology is useful where physical connections are impractical due to high costs or other considerations. For example, free space optical links are used in cities between office buildings which are not wired for networking, where the cost of running cable through the building and under the street would be prohibitive. Another widely used example is consumer IR devices such as remote controls and IrDA Infrared Data Association networking, which is used as Wireless Communications alternative to WiFi networking to allow laptops, PDAs, printers, and digital cameras to exchange data. Sonic, especially ultrasonic short range communication involves the transmission and reception of Wireless Communications. Electromagnetic induction only allows short-range communication and power transmission. It has been used in biomedical situations such as pacemakers, as well as for short-range RFID tags. Common examples of wireless equipment include: [28]. AM and FM radios and other electronic Wireless Communications make use of the electromagnetic spectrum. Their regulations determine which frequency ranges can be used for what purpose and by whom. In the Wireless Communications of such control or alternative arrangements such as a privatized electromagnetic spectrum, chaos might result if, for example, airlines did not have specific frequencies to work under and an amateur radio operator was interfering with a pilot's ability to land an aircraft. One of the best-known examples of wireless technology is the mobile phoneWireless Communications known as a cellular phone, with more than 6. They can be used within range of the mobile telephone site used to house the equipment required to transmit Wireless Communications receive the radio signals from these instruments. Wireless data communications allows wireless networking between desktop computerslaptopstablet computerscell phones and other related devices. The various available technologies Wireless Communications in local availability, coverage range and performance, [32] [33] and in some circumstances users employ multiple connection types and switch between them using connection manager software Wireless Communications [35] or a mobile VPN to handle the multiple connections as a secure, single virtual network. Wireless data communications Wireless Communications used to span a distance beyond the capabilities of typical cabling in point-to-point communication and point-to-multipoint communicationto provide a backup communications link in case of normal network failure, to link portable Wireless Communications temporary workstations, to overcome situations where normal cabling is difficult or financially impractical, Wireless Communications to remotely connect mobile users Wireless Communications networks. Peripheral devices in computing can also be connected wirelessly, as part of a Wi-Fi network or directly via an optical or Wireless Communications RF peripheral interface. Originally these units used bulky, highly local transceivers to mediate Wireless Communications a computer and a keyboard and mouse; however, more recent generations have used smaller, higher-performance devices. Radio-frequency interfaces, such as Bluetooth or Wireless USBprovide greater ranges of efficient use, usually up to 10 feet, but distance, physical obstacles, competing signals, and even human bodies can all degrade Wireless Communications signal quality. Wireless energy transfer is a process whereby electrical energy is transmitted from a power source to an electrical load that does not have a built- in power source, without the use of interconnecting wires. Wireless Communications are two different fundamental methods for wireless energy transfer. New wireless technologies, such as mobile body area networks MBANhave the capability to monitor blood pressure, heart rate, oxygen level and body temperature. The MBAN works by sending low powered Wireless Communications signals to receivers that feed into nursing stations or monitoring sites. This technology helps with the intentional and unintentional risk of infection or disconnection that arise Wireless Communications wired connections. From Wikipedia, the free encyclopedia. For other uses, see Wireless disambiguation. Common types. Safety and regulation. Mobile phone radiation Wireless Communications health Wireless electronic devices and health International Telecommunication Union Radio Regulations. Beam steering Beam tilt Beamforming Small cell. Reconfiguration Spread spectrum. See Wireless Communications History of telecommunication. Main article: Photophone. Main article: Wireless telegraphy. Main article: History of radio. Main articles: Radio communication and Radio communication service. Further information: Microwave transmission. Main article: Free-space optical communication. See also: Spectrum management. For all wireless Internet access, see Wireless broadband. For mobile wireless Internet, see Mobile broadband. See also: Radio data communication. Main article: Wireless energy transfer. Retrieved Energy Technology. January Wireless Communications, ". List of IEEE milestones. Institute of Electrical and Electronics Engineers. Retrieved 1 October Bibcode : imsd. The Silicon Engine. Computer History Museum. Retrieved 22 August Retrieved 23 August CRC Press. November The Economist. January 21, Retrieved 12 September Jayant World Scientific. Encyclopedia Britannica. Wireless Multimedia Network Technologies. Springer US. IEEE Spectrum. Electronic Design. Retrieved 23 July Scientific American. Bibcode : SciAm. Fet Technology and Application. Wireless Communication: Introduction, Types and Applications

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