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Advanced Book Search Browse by Subject. Another widely used example is consumer IR devices such as remote controls and IrDA Infrared Data Association networking, which is used as an 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 sound. 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:  .
AM and FM radios and other electronic devices make use of the electromagnetic spectrum.
Their regulations determine which frequency ranges can be used for what purpose and by whom. In the absence 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 phone , also 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 and receive the radio signals from these instruments. Wireless data communications allows wireless networking between desktop computers , laptops , tablet computers , cell phones and other related devices.
The various available technologies differ in local availability, coverage range and performance,   and in some circumstances users employ multiple connection types and switch between them using connection manager software   or a mobile VPN to handle the multiple connections as a secure, single virtual network.
Wireless data communications are used to span a distance beyond the capabilities of typical cabling in point-to-point communication and point-to-multipoint communication , to provide a backup communications link in case of normal network failure, to link portable or temporary workstations, to overcome situations where normal cabling is difficult or financially impractical, or to remotely connect mobile users or networks. Peripheral devices in computing can also be connected wirelessly, as part of a Wi-Fi network or directly via an optical or radio-frequency RF peripheral interface.
Originally these units used bulky, highly local transceivers to mediate between 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 USB , provide greater ranges of efficient use, usually up to 10 feet, but distance, physical obstacles, competing signals, and even human bodies can all degrade the 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. There are two different fundamental methods for wireless energy transfer. New wireless technologies, such as mobile body area networks MBAN , have the capability to monitor blood pressure, heart rate, oxygen level and body temperature. The MBAN works by sending low powered wireless 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 from wired connections. From Wikipedia, the free encyclopedia. For other uses, see Wireless disambiguation. This article contains embedded lists that may be poorly defined, unverified or indiscriminate. Please help to clean it up to meet Wikipedia's quality standards. Where appropriate, incorporate items into the main body of the article. December Common types. Safety and regulation. Mobile phone radiation and health Wireless electronic devices and health International Telecommunication Union Radio Regulations.
Beam steering Beam tilt Beamforming Small cell. Reconfiguration Spread spectrum. See also: History of telecommunication. Main article: Photophone. Main article: Wireless telegraphy. Main article: History of radio. Main articles: Radio and 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. Main article: Wireless energy transfer. Retrieved Energy Technology. January Bose, ". List of IEEE milestones.
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