| The term wireless is normally used to
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| | were previously manufactured with hard
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| refer to any type of electrical or
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| | wired remote controls which plugged in to
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| electronic operation which is
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| | a receptacle or jack in the television
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| accomplished without the use of a "hard
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| | whereas more modern televisions use
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| wired" connection. Some of these
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| | wireless (generally infrared) remote
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| operations may also be accomplished with
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| | control units.
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| the use of wires if desired, while
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| | Cellular telephones
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| others, such as long range
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| | Perhaps one of the most well known
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| communications, are impossible or
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| | examples of wireless technology in action
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| impractical to implement with the use of
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| | is the cellular telephone. These
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| wires. The term is commonly used in the
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| | instruments use radio waves to enable the
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| telecommunications industry to refer to
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| | operator to make phone calls from many
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| telecommunications systems (e.g., radio
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| | locations world-wide. They can be used
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| transmitters and receivers, remote
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| | anywhere that there is a cellular
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| controls, computer networks, network
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| | telephone site to house the equipment
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| terminals, etc.) which use some form of
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| | that is required to transmit and receive
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| energy (e.g.,radio frequency (RF),
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| | the signal that is used to transfer both
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| infrared light, laser light, visible
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| | voice and data to and from these
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| light, acoustic energy, etc.) to transfer
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| | instruments.
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| information without the use of wires.[1]
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| | History
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| Information is transferred in this manner
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| | The term "wireless" came into public use
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| over both short and long distances.
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| | to refer to a radio receiver or
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| The term "wireless" should not be
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| | transceiver (a dual purpose receiver and
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| confused with the term "cordless", which
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| | transmitter device), establishing its
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| is generally used to refer to powered
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| | usage in the field of wireless telegraphy
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| electrical or electronic devices that are
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| | early on; now the term is used to
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| able to operate from a portable power
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| | describe modern wireless connections such
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| source (e.g., a battery pack) without any
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| | as in cellular networks and wireless
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| cable or cord to limit the mobility of
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| | broadband Internet. It is also used in a
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| the cordless device through a connection
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| | general sense to refer to any type of
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| to the mains power supply. It is
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| | operation that is implemented without the
|
| interesting to note that some cordless
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| | use of wires, such as "wireless remote
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| devices, such as cordless telephones, are
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| | control", "wireless energy transfer",
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| also wireless in the sense that
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| | etc. regardless of the specific
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| information is transferred from the
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| | technology (e.g., radio, infrared,
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| cordless telephone to the telephone's
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| | ultrasonic, etc.) that is used to
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| base unit via some type of wireless
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| | accomplish the operation.
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| communications link. This has caused some
| |
| | Heinrich Rudolf Hertz
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| disparity in the usage of the term
| |
| | Possibly the most important discovery in
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| "cordless", for example in Digital
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| | the history of wireless technology was
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| Enhanced Cordless Telecommunications.
| |
| | the demonstration by Heinrich Rudolf
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| Examples of wireless technology at work
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| | Hertz in 1888 that electromagnetic waves
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| Security systems
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| | exist as predicted by James Clerk Maxwell
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| One common example of an operation or
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| | and Michael Faraday. He also proved that
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| operations where the implementation of
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| | these waves could be transmitted and
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| wireless technology may supplement or
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| | caused to travel through space and that
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| replace hard wired implementations is in
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| | they were able to be received by an
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| security systems for homes or office
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| | experimental apparatus.[2][3] The
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| buildings. The operations that are
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| | experiments of Hertz proved to be very
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| required (e.g., detecting whether a door
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| | important to the fields of wireless
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| or window is open or closed) may be
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| | communication and remote control, though
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| implemented with the use of hard wired
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| | practical applications of the technology
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| sensors or they may be implemented with
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| | would be implemented by others.
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| the use of wireless sensors which are
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| | Nikola Tesla
|
| also equipped with some type of wireless
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| | Some principles and inventions of
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| transmitter (e.g., infrared, radio
| |
| | wireless technology can be found in the
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| frequency, etc.) to transmit the
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| | lectures, patent record, and other
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| information concerning the current state
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| | accounts of the electrical engineer
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| of the door or window.
| |
| | Nikola Tesla (such as his 1916 deposition
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| Television remote control
| |
| | on the history of wireless and radio
|
| Another example would be the use of a
| |
| | technology: 'Nikola Telsa On His Work
|
| wireless remote control unit to replace
| |
| | With Alternating Currents And Their
|
| the old hard wired remote control units
| |
| | Application to Wireless Telegraphy,
|
| that were sometimes used in the
| |
| | Telephony, and Transmission of Energy,
|
| television industry. Some televisions
| |
| | Anderson, Leland, ed., Published 1992).
|
