In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location. In radio navigation systems such as GPS and VOR, a mobile receiver accepts radio signals from navigational radio beacons whose position is known, and by precisely measuring the arrival time of the radio waves the receiver can calculate its position on Earth. In wireless radio remote control devices like drones, garage door openers, and keyless entry systems, radio signals transmitted from a controller device control the actions of a remote device. (Full article...)
Neal A Boortz Jr. (born April 6, 1945) is an American author, former attorney, and former conservative radio host. His nationally syndicatedtalk show, The Neal Boortz Show, which ended in 2013, was carried throughout the United States. The content of the show included politics, current events, social issues, and topics of interest, which Boortz discussed with callers, correspondents, and guests. Boortz touched on many controversial topics.
Boortz's first involvement with radio was in the 1960s, while he was a student at Texas A&M University, working as a local on-air personality at WTAW. After moving to Georgia, he became an avid listener of Atlanta's first talk radio station. Boortz became a regular caller to the morning talk show. When the show's host died, it created a job opening, which Boortz actively pursued. He was initially hired on a two-week "trial run", and later offered the permanent position. Boortz attended law school, earning a law degree in 1977. For some years he worked as both an attorney and as a talk show host. He eventually closed his law practice after 17 years to concentrate on his work in radio. (Full article...)
The following are images from various radio-related articles on Wikipedia.
Image 1British Post Office engineers inspect Guglielmo Marconi's wireless telegraphy (radio) equipment in 1897. (from History of radio)
Image 2Diagram of the electric fields (E) and magnetic fields (H) of radio waves emitted by a monopole radio transmitting antenna (small dark vertical line in the center). The E and H fields are perpendicular, as implied by the phase diagram in the lower right. (from Radio wave)
Image 3Donald Manson working as an employee of the Marconi Company (England, 1906) (from History of radio)
Image 4Animation of a half-wave dipoleantenna radiating radio waves, showing the electric field lines. The antenna in the center is two vertical metal rods connected to a radio transmitter (not shown). The transmitter applies an alternating electric current to the rods, which charges them alternately positive (+) and negative (−). Loops of electric field leave the antenna and travel away at the speed of light; these are the radio waves. In this animation the action is shown slowed down enormously. (from Radio wave)
Image 5Around 1920, radio broadcasting started to get popular. A group of women gathered around the radio at the time. (from History of radio)
Image 6Advertisement placed in the November 5, 1919 Nieuwe Rotterdamsche Courant announcing PCGG's debut broadcast scheduled for the next evening. (from Radio broadcasting)
Image 7Animated diagram of a half-wave dipole antenna receiving a radio wave. The antenna consists of two metal rods connected to a receiver R. The electric field (E, green arrows) of the incoming wave pushes the electrons in the rods back and forth, charging the ends alternately positive (+) and negative (−). Since the length of the antenna is one half the wavelength of the wave, the oscillating field induces standing waves of voltage (V, represented by red band) and current in the rods. The oscillating currents (black arrows) flow down the transmission line and through the receiver (represented by the resistance R). (from Radio wave)
Image 8Oliver Lodge's 1894 lectures on Hertz demonstrated how to transmit and detect radio waves (from History of radio)
Image 15In the 1920s, the United States government publication, "Construction and Operation of a Simple Homemade Radio Receiving Outfit", showed how almost any person handy with simple tools could a build an effective crystal radio receiver. (from History of radio)
... that Travancore Radio's first English-language broadcaster, Indira Joseph Venniyoor, was paid 69 rupees (then equivalent to US$14.50) for her broadcasts in 1949?
... that the relative rarity of the radiodontTitanokorys(video featured) in Marble Canyon suggests that the deposits in which it was found may represent the outermost edge of its distribution in life?
... that San Francisco's "KYOU Radio" was the first terrestrial radio station to broadcast a program format consisting of podcasts?
... that listeners to ESPN's sports podcasts are "13 years younger than" ESPN Radio listeners, according to a company executive?
RadioDecember 12, 2006 "...to create, expand, and maintain wikipedia articles related to radio, including radio propagation and reception, radio programming, radio personalities, and the business of radio." (Example: Mutual Broadcasting System)
Radio StationsFebruary 15, 2005 "...to coordinate the activities of creating and maintaining articles about radio stations." (Example: Pulse FM Kingborough & Huon)
PodcastingJanuary 21, 2007 "...to make Wikipedia's knowledge of notable Podcast and podcast-related information as complete as possible." (Example: Podcast)
Amateur Radio(Inactive), August 24, 2006 "...to improve Wikipedia's articles related to Amateur radio, maintain the amateur radio category and its sub-categories for clean organization, and to produce and maintain templates for Amateur radio-related topic identification." (Example: Amateur radio)
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