Wireless Broadband Description

Comparison Of Wireless Data Standards ... Standards can be grouped as follows: UWB, Bluetooth, ZigBee, and Wireless USB are intended for use as wireless personal area network (PAN) systems...

Wireless ... Some cordless devices, such as cordless telephones, are also wireless in the sense that information is transferred from the cordless telephone to the telephone's base unit via some type of wireless communications link... History Photophone The world's first wireless telephone conversation occurred in 1880, when Alexander Graham Bell and Charles Sumner Tainter invented and patented the photophone, a telephone that conducted audio conversations wirelessly over modulated light beams (which are narrow projections of electromagnetic waves)... In the history of wireless technology, the demonstration of the theory of electromagnetic waves by Heinrich Hertz in 1888 was important...

Nikola Tesla ... Because of his 1894 demonstration of short range wireless communication through radio and as the eventual victor in the "War of Currents", he was widely respected as one of the greatest electrical engineers who worked in America... Tesla demonstrated wireless energy transfer to power electronic devices in 1891, and aspired to intercontinental wireless transmission of industrial power in his unfinished Wardenclyffe Tower project...

Guglielmo Marconi ... Marconi wrote to the ministry of Post and Telegraphs, which at the time was under the direction of the honorable Pietro Lacava, explaining his wireless telegraph machine and asking for funding... A plaque on the outside of BT Centre commemorates Marconi's first public transmission of wireless signals from that site...

List Of United States Wireless Communications Service Providers ... According to the Cellular Telecommunications & Internet Association (CTIA), there are over 180 facilities-based wireless service providers in the United States... The top 8 wireless telecommunications service providers in the United States, from largest to smallest by the number of current subscribers, are: Verizon Wireless (108.7 million) AT& T Mobility (103.2 million) Sprint Nextel (55 million) T-Mobile USA (34 million) TracFone Wireless (17.75 million) MetroPCS (9 million) U. S... Cellular (6 million) Cricket Wireless (6 million) Of these, AT& T and T-Mobile use the GSM standard, while the other providers on the list, with the exception of TracFone, use CDMA...

History Of Radio ... In 1895, Marconi built a wireless system capable of transmitting signals at long distances (1.5 mi./ 2.4 km)... Early radio telegraphy and telephony The term wireless telegraphy is a historical term used today to apply to early radio telegraph communications techniques and practices, particularly those used during the first three decades of radio (1887 to 1920) before the term radio came into use... Turn of the 19th to 20th century Around the turn of the 19th to 20th century, the Slaby-Arco wireless system was developed by Adolf Slaby and Georg von Arco...

Timeline Of Radio ... Origins and developments The identity of the original inventor of radio, at the time called wireless telegraphy, is contentious...

Photophone ... On April 1, 1880, and also described by plaque as occurring on June 3, Bell's assistant transmitted the world's first wireless telephone message to him on their newly invented form of telecommunication, the far advanced precursor to fiber-optic communications that came into widespread use during the 1980s... The wireless call was sent from the roof of the Franklin School to the window of Bell's laboratory, some 213 metres (700 ft) away...

Wireless Energy Transfer ... The most common form of wireless power transmission is carried out using direct induction followed by resonant magnetic induction...

Telegraphy ... The advent of radio in the early 1900s brought about radiotelegraphy and other forms of wireless telegraphy... Wireless telegraphy is also known as "CW", for continuous wave (a carrier modulated by on-off keying), as opposed to the earlier radio technique of using a spark gap...

History Of Electromagnetic Theory ... Based on his find of an Olmec hematite artifact in Central America, the American astronomer John Carlson has suggested that "the Olmec may have discovered and used the geomagnetic lodestone compass earlier than 1000 BC". If true, this "predates the Chinese discovery of the geomagnetic lodestone compass by more than a millennium"...

Bluetooth ... Bluetooth is managed by the Bluetooth Special Interest Group, which has more than 15,000 member companies in the areas of telecommunication, computing, networking, and consumer electronics. The SIG oversees the development of the specification, manages the qualification program, and protects the trademarks...

Resonant Inductive Coupling ... Resonant energy transfer is the operating principle behind proposed short range wireless electricity systems such as WiTricity and systems that have already been deployed, such as passive RFID tags and contactless smart cards...

Mobile Phone Radiation And Health ... The WHO has classified mobile phone radiation on the IARC scale into Group 2B - possibly carcinogenic. That means that there "could be some risk" of carcinogenicity, so additional research into the long-term, heavy use of mobile phones needs to be conducted...

Invention Of Radio ... The various methods for wireless signal transmissions include: Electrical conduction through the ground, or through water... The physical phenomenon used today for long-distance wireless communications involves the use of modulated electromagnetic waves, which is radio...

Wardenclyffe Tower ... He offered Tesla 200 acres (81 ha) of land close to a railway line on which to build his wireless telecommunications tower and laboratory facility... In addition to commercial wireless telecommunications, Tesla intended the tower be used to demonstrate how electrical energy could be transmitted without the need for power lines...

Wireless Telegraphy ... Wireless telegraphy originated as a term to describe electrical signaling without the electric wires to connect the end points... Wireless telegraphy rapidly came to mean Morse code transmitted with Hertzian waves (electromagnetic waves) decades before it came to be associated with the term radio... Wireless telegraphy is still used widely today by amateur radio hobbyists where it is commonly referred to as radiotelegraphy, continuous wave, or just CW...

Wireless Electronic Devices And Health ... International guidelines on exposure levels to microwave frequency EMFs such as ICNIRP limit the power levels of wireless devices and it is uncommon for wireless devices to exceed the guidelines... Exposure difference to mobile phones Users of wireless devices are typically exposed for much longer periods than for mobile phones and the strength of wireless devices is not significantly less... Whereas a mobile phone can range from 21 dBm (125 mW) for Power Class 4 to 33 dBm (2W) for Power class 1, a wireless router can range from a typical 15 dBm (30 mW) strength to 27 dBm (500 mW) on the high end...

Wireless Internet Service Provider ... In the US, the Federal Communications Commission (FCC) released Report and Order, FCC 05-56 in 2005 that revised the FCC’s rules to open the 3650 MHz band for terrestrial wireless broadband operations... On November 14, 2007 the Commission released Public Notice (DA 07-4605) in which the Wireless Telecommunications Bureau announced the start date for licensing and registration process for the 3650-3700 MHz band... Using what was one of the first wireless LAN products available for wireless barcode scanning in stores, called Aironet (now owned by Cisco), they worked out if they ran a dedicated Telco link into the highest building in a business area or CBD they could wirelessly "cable" up all the other buildings back to this main point and would only require one link from the Telco to connect up hundreds of businesses at the same time...

Bluetooth Profile ... For example, music can be streamed from a mobile phone, to a wireless headset, hearing aid & cochlear implant streamer, or car audio or from a laptop/desktop to a wireless headset...