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searching for Radio Waves (radio station) 192 found (1384 total)

alternate case: radio Waves (radio station)

Radio wave (752 words) [view diff] no match in snippet view article find links to article
(disambiguation). Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Radio waves have
Radio Waves (song) (174 words) [view diff] no match in snippet view article find links to article
"Radio Waves" is the opening track from Roger Waters' second solo studio album, Radio K.A.O.S. It was chosen as the lead single for the album, released
Radio Waves (album) (89 words) [view diff] no match in snippet view article find links to article
Radio Waves is a comedy album by The Bob & Tom Show, which was not released to the general public but only to men and women serving overseas in the US
Transmitter (1,481 words) [view diff] no match in snippet view article find links to article
is an electronic device which, with the aid of an antenna, produces radio waves. The transmitter itself generates a radio frequency alternating current
Jet Black & Jealous (351 words) [view diff] no match in snippet view article find links to article
Top 20 hit with a peak of #11. The album's third and fourth singles, "Radio Waves" and "Guinevere," peaked at #35 and #45, respectively. Andrew Leahey
Kennelly–Heaviside layer (665 words) [view diff] no match in snippet view article find links to article
Earth's ionosphere. It reflects medium-frequency radio waves, and because of this reflection, radio waves can be propagated beyond the horizon. Propagation
Parabolic antenna (3,655 words) [view diff] no match in snippet view article find links to article
surface with the cross-sectional shape of a parabola, to direct the radio waves. The most common form is shaped like a dish and is popularly called a
Microwave transmission (3,309 words) [view diff] no match in snippet view article find links to article
frequencies without interfering with each other, as lower frequency radio waves do. Another advantage is that the high frequency of microwaves gives
Crab Nebula (4,554 words) [view diff] no match in snippet view article find links to article
times per second, which emits pulses of radiation from gamma rays to radio waves. The nebula was the first astronomical object identified with a historical
Ultra high frequency (2,111 words) [view diff] no match in snippet view article find links to article
decimetre band as the wavelengths range from one to ten decimetres. Radio waves with frequencies above the UHF band fall into the SHF (super-high frequency)
Radio (6,388 words) [view diff] no match in snippet view article find links to article
waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating
Ground station (792 words) [view diff] no match in snippet view article find links to article
for extraplanetary telecommunication with spacecraft, or reception of radio waves from an astronomical radio source. Ground stations are located either
Frequency (2,028 words) [view diff] no match in snippet view article find links to article
vibratory phenomena, such as mechanical vibrations, audio (sound) signals, radio waves, and light. For cyclical processes, such as rotation, oscillations
Karl Guthe Jansky (1,547 words) [view diff] no match in snippet view article find links to article
American physicist and radio engineer who in August 1931 first discovered radio waves emanating from the Milky Way. He is considered one of the founding figures
Passive radiator (659 words) [view diff] no match in snippet view article find links to article
of the parasitic elements is to modify the radiation pattern of the radio waves emitted by the driven element, directing them in a beam in one direction
Monopole antenna (1,186 words) [view diff] no match in snippet view article find links to article
monopole is a resonant antenna; the rod functions as a resonator for radio waves, with oscillating standing waves of voltage and current along its length
Alexander Stepanovich Popov (1,896 words) [view diff] no match in snippet view article find links to article
Russian Federation as Radio Day. In a March 24, 1896 demonstration he used radio waves to transmit a message between different campus buildings in St Petersburg
High frequency (1,602 words) [view diff] no match in snippet view article find links to article
designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 MHz. It is also known as the decameter band or decameter
Radio propagation (3,578 words) [view diff] no match in snippet view article find links to article
Radio propagation is the behavior of radio waves when they are transmitted, or propagated from one point on the Earth to another, or into various parts
Broadcasting (2,363 words) [view diff] no match in snippet view article find links to article
communications medium, but typically one using the electromagnetic spectrum (radio waves), in a one-to-many model. The term "broadcasting," derived from the method
ARIANNA Experiment (126 words) [view diff] no match in snippet view article find links to article
surface area. There, the ice-water interface below the shelf reflects radio waves, giving ARIANNA sensitivity to downward going neutrinos and improving
Radiation (5,457 words) [view diff] no match in snippet view article find links to article
a material medium. This includes electro-magnetic radiation such as radio waves, visible light, and x-rays, particle radiation such as α, β, and neutron
Dielectric resonator antenna (481 words) [view diff] no match in snippet view article find links to article
the dielectric resonator, mounted on a metal surface, a ground plane. Radio waves are introduced into the inside of the resonator material from the transmitter
Skywave (1,728 words) [view diff] no match in snippet view article find links to article
In radio communication, skywave or skip refers to the propagation of radio waves reflected or refracted back toward Earth from the ionosphere, an electrically
S band (646 words) [view diff] no match in snippet view article find links to article
the electromagnetic spectrum. It is defined by an IEEE standard for radio waves with frequencies that range from 2 to 4 GHz, crossing the conventional
Feed horn (359 words) [view diff] no match in snippet view article find links to article
design, a feedhorn (or feed horn) is a small horn antenna used to convey radio waves between the transmitter and/or receiver and the reflector, particularly
Astronomical radio source (1,592 words) [view diff] no match in snippet view article find links to article
Astronomical radio sources are objects in outer space that emit strong radio waves. Radio emission comes from a wide variety of sources. Such objects represent
Microwave (3,400 words) [view diff] no match in snippet view article find links to article
infrared, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary and are used variously between different fields
Radar (9,398 words) [view diff] no match in snippet view article find links to article
(disambiguation). Radar is an object-detection system that uses radio waves to determine the range, altitude, direction, or speed of objects. It
Critical hours (256 words) [view diff] no match in snippet view article find links to article
Hours are required to do so because this is when the propagation of radio waves changes from groundwave to skywave (at sunset) or vice versa (at sunrise)
GRB 970228 (2,391 words) [view diff] no match in snippet view article find links to article
GRBs to be followed by a lower-energy afterglow (in wavelengths such as radio waves, x-rays, and even visible light), but until this event, GRBs had only
Radio broadcasting (3,442 words) [view diff] no match in snippet view article find links to article
Radio broadcasting is a one-way wireless transmission over radio waves intended to reach a wide audience. Stations can be linked in radio networks to
Optical pulsar (124 words) [view diff] no match in snippet view article find links to article
detected by stroboscopic techniques in 1969, shortly after its discovery in radio waves, at the Steward Observatory. The Vela pulsar was detected in 1977 at
Electromagnetic radiation (8,483 words) [view diff] no match in snippet view article find links to article
familiar forms are invisible electromagnetic radiations such as X-rays and radio waves. Classically, EMR consists of electromagnetic waves, which are synchronized
GRB 970508 (2,852 words) [view diff] no match in snippet view article find links to article
radio signals, astronomer Dale Frail calculated that the source of the radio waves had expanded almost at the speed of light. This provided strong evidence
Receiver (radio) (2,474 words) [view diff] no match in snippet view article find links to article
receives radio waves and converts the information carried by them to a usable form. It is used with an antenna. The antenna intercepts radio waves (electromagnetic
Antenna (radio) (12,159 words) [view diff] no match in snippet view article find links to article
(or aerial) is an electrical device which converts electric power into radio waves, and vice versa. It is usually used with a radio transmitter or radio
Solaren (262 words) [view diff] no match in snippet view article find links to article
placed in Earth's orbit.The satellite would convert this energy into radio waves and send it to a receiving station in Fresno County, California. The
Antenna aperture (1,200 words) [view diff] no match in snippet view article find links to article
is a measure of how effective an antenna is at receiving the power of radio waves. The aperture is defined as the area, oriented perpendicular to the direction
Rectenna (698 words) [view diff] no match in snippet view article find links to article
are used in wireless power transmission systems that transmit power by radio waves. A simple rectenna element consists of a dipole antenna with an RF diode
Reflective array antenna (508 words) [view diff] no match in snippet view article find links to article
elements are mounted in front of a flat surface designed to reflect the radio waves in a desired direction. They are often used in the VHF frequency band
Antenna feed (298 words) [view diff] no match in snippet view article find links to article
antenna which feed the radio waves to the rest of the antenna structure, or in receiving antennas collect the incoming radio waves, convert them to electric
Sudden ionospheric disturbance (438 words) [view diff] no match in snippet view article find links to article
recorded and indicate when solar flares have taken place. Short wave radio waves (in the HF range) are absorbed by the increased particles in the low
Radio astronomy (2,695 words) [view diff] no match in snippet view article find links to article
studies celestial objects at radio frequencies. The initial detection of radio waves from an astronomical object was made in the 1930s, when Karl Jansky observed
Westerhout 43 (458 words) [view diff] no match in snippet view article find links to article
wavelengths that are not affected by it, such as the infrared or the radio waves. This star-forming region is located in the 5-kpc ring, a ring with
IRAS 18162−2048 (218 words) [view diff] no match in snippet view article find links to article
In 2010 HH 80–81 jet of IRAS 18162-2048 were found to emit polarized radio waves, which indicated that they were produced by relativistic electrons moving
Apex (radio band) (477 words) [view diff] no match in snippet view article find links to article
Communications Commission thought initially that very high frequency (VHF) radio waves would have a small, discrete range, and would allow two or more stations
Radiophysics (219 words) [view diff] no match in snippet view article find links to article
with matter. The term is used in the following major meanings: study of radio waves (the original area of research) study of radiation used in radiology
Offset dish antenna (480 words) [view diff] no match in snippet view article find links to article
radio waves. In an ordinary front-fed dish antenna, the feed structure and its supports are located in the path of the incoming beam of radio waves,
Helical antenna (1,063 words) [view diff] no match in snippet view article find links to article
the helix, along the antenna's axis. It radiates circularly polarised radio waves. Radiating at 90 degrees from the axis of the helix this design is
Kosmos 119 (275 words) [view diff] no match in snippet view article find links to article
by the Yuzhnoye Design Bureau, and was used to study the effects on radio waves of passing through the ionosphere. A Kosmos-2I 63SM carrier rocket was
Maximum usable frequency (413 words) [view diff] no match in snippet view article find links to article
propagation is for the radio waves to reflect off the ionized layers of the atmosphere and return diagonally back to Earth. In this way radio waves can travel beyond
Optical imaging (718 words) [view diff] no match in snippet view article find links to article
electromagnetic wave, similar phenomena occur in X-rays, microwaves, radio waves. Chemical imaging or molecular imaging involves inference from the deflection
Wireless telegraphy (7,941 words) [view diff] no match in snippet view article find links to article
historical term for early radio telegraphy systems which communicated with radio waves, although when the term originated in the late 1800s it was also used
Ionosphere (4,490 words) [view diff] no match in snippet view article find links to article
high-frequency (HF) radio waves are not reflected by the D layer but suffer loss of energy therein. This is the main reason for absorption of HF radio waves, particularly
Phase modulation (384 words) [view diff] no match in snippet view article find links to article
of a carrier wave. Phase modulation is widely used for transmitting radio waves and is an integral part of many digital transmission coding schemes that
Radio frequency (1,740 words) [view diff] no match in snippet view article find links to article
range of around 3 kHz to 300 GHz, which corresponds to the frequency of radio waves, and the alternating currents which carry radio signals. RF usually refers
Essaim (satellite) (194 words) [view diff] no match in snippet view article find links to article
intelligence across the world. The DGA describes it as a "vacuum cleaner for [radio] waves". Essaim is a constellation of four 120 kg micro satellites (including
Kosmos 259 (274 words) [view diff] no match in snippet view article find links to article
by the Yuzhnoye Design Bureau, and was used to study the effects on radio waves of passing through the ionosphere. A Kosmos-2I 63SM carrier rocket was
Slot antenna (250 words) [view diff] no match in snippet view article find links to article
driving frequency, determine the radiation distribution pattern. Often the radio waves are provided by a waveguide, and the antenna consists of slots in the
Radio K.A.O.S. (2,573 words) [view diff] no match in snippet view article find links to article
David in Los Angeles, California, USA. Since Billy can hear radio waves in his head ("Radio Waves" track 1), he begins to explore the cordless phone, recognising
Ground plane (1,020 words) [view diff] no match in snippet view article find links to article
the transmitter's ground wire and serves as a reflecting surface for radio waves. In printed circuit boards, a ground plane is a large area of copper
Dark nebula (379 words) [view diff] no match in snippet view article find links to article
interstellar dust or material, things it obscures are only visible using radio waves in radio astronomy or infrared in infrared astronomy. Dark clouds appear
Random wire antenna (623 words) [view diff] no match in snippet view article find links to article
ground, whose length does not bear a relation to the wavelength of the radio waves used, but is typically chosen more for convenience. The wire may be straight
Radio spectrum (1,505 words) [view diff] no match in snippet view article find links to article
transmission, emission and/or reception of radio waves for specific telecommunication purposes” of radio waves is strictly regulated by the national administration
Electromagnetic spectrum (4,387 words) [view diff] no match in snippet view article find links to article
Heinrich Hertz built an apparatus to generate and detect what is now called radio waves. Hertz found the waves and was able to infer (by measuring their wavelength
Antenna boresight (158 words) [view diff] no match in snippet view article find links to article
changing the angle of the boresight by shifting the relative phase of the radio waves emitted by different antenna elements, and even radiate beams in multiple
Skip distance (213 words) [view diff] no match in snippet view article find links to article
distance is a distance on the Earth's surface between the two points where radio waves from a transmitter, refracted downwards by different layers of the ionosphere
Extremely low frequency (2,781 words) [view diff] no match in snippet view article find links to article
frequency (ELF) is the ITU designation for electromagnetic radiation (radio waves) with frequencies from 3 to 30 Hz, and corresponding wavelengths from
Super high frequency (869 words) [view diff] no match in snippet view article find links to article
ten centimetres. These frequencies fall within the microwave band, so radio waves with these frequencies are called microwaves. The small wavelength of
Debussy (crater) (245 words) [view diff] no match in snippet view article find links to article
fresh and rough surfaces of young impact craters are good scatterers of radio waves. Debussy is named after Claude Debussy (1862–1918), one of the most
Datacasting (1,107 words) [view diff] no match in snippet view article find links to article
(data broadcasting) is the broadcasting of data over a wide area via radio waves. It most often refers to supplemental information sent by television
Hokusai (crater) (261 words) [view diff] no match in snippet view article find links to article
impact ejecta has a rough surface, which leads to strong scattering of radio waves. Hokusai is named after Katsushika Hokusai (1760–1849), a Japanese artist
Wireless router (675 words) [view diff] no match in snippet view article find links to article
not require a wired link, as the connection is made wirelessly, via radio waves. It can function in a wired LAN (local area network), in a wireless-only
Fire-control radar (717 words) [view diff] no match in snippet view article find links to article
the target(s)). Such radars typically emit a narrow, intense beam of radio waves to ensure accurate tracking information and to minimise the chance of
Frequency of optimum transmission (131 words) [view diff] no match in snippet view article find links to article
Frequency of optimum transmission (FOT), in the transmission of radio waves via ionospheric reflection, is the highest effective (i.e. working) frequency
Wireless (2,843 words) [view diff] no match in snippet view article find links to article
electrical conductor. The most common wireless technologies use radio. With radio waves distances can be short, such as a few meters for television or as far
Contactless smart card (2,087 words) [view diff] no match in snippet view article find links to article
store and sometimes process data and communicate with a terminal via radio waves. There are two broad categories of contactless smart cards. Memory cards
Electric current (4,053 words) [view diff] no match in snippet view article find links to article
electric currents flow at the correct voltages within radio antennas, radio waves are generated. In electronics, other forms of electric current include
Interplanetary scintillation (1,127 words) [view diff] no match in snippet view article find links to article
interplanetary scintillation refers to random fluctuations in the intensity of radio waves of celestial origin, on the timescale of a few seconds. It is analogous
Super low frequency (359 words) [view diff] no match in snippet view article find links to article
low frequency (SLF) is the ITU designation for electromagnetic waves (radio waves) in the frequency range between 30 hertz and 300 hertz. They have corresponding
Extremely high frequency (1,899 words) [view diff] no match in snippet view article find links to article
low (or far) infrared light, also referred to as terahertz radiation. Radio waves in this band have wavelengths from ten to one millimetre, giving it the
Magnetic resonance imaging of the brain (419 words) [view diff] no match in snippet view article find links to article
resonance imaging (MRI) of the nervous system uses magnetic fields and radio waves to produce high quality two- or three-dimensional images of nervous system
KXRX (437 words) [view diff] no match in snippet view article find links to article
Seattle Weekly wrote that Norman B. was "stirring up the Sunday night radio waves" and "breaking the sound barrier." Prompted by the success of "Seattle
Radiolocation (1,293 words) [view diff] no match in snippet view article find links to article
the process of finding the location of something through the use of radio waves. It generally refers to passive uses, particularly radar—as well as detecting
Ephemeralization (617 words) [view diff] no match in snippet view article find links to article
"visual" to "abstract electrical" (i.e., nonsensorial radiation, such as radio waves, x rays, etc.). Length measurement technologies in human development
Stub (electronics) (992 words) [view diff] no match in snippet view article find links to article
of radio waves along their length. Their reactive properties are determined by their physical length in relation to the wavelength of the radio waves. Therefore
Cable television (1,896 words) [view diff] no match in snippet view article find links to article
television, in which the television signal is transmitted over the air by radio waves and received by a television antenna attached to the television. FM radio
Non-ionizing radiation (2,247 words) [view diff] no match in snippet view article find links to article
cancer in humans. Near ultraviolet, visible light, infrared, microwave, radio waves, and low-frequency radio frequency (longwave) are all examples of non-ionizing
Kosmos 142 (287 words) [view diff] no match in snippet view article find links to article
by the Yuzhnoye Design Bureau, and was used to study the effects on radio waves of passing through the ionosphere. A Kosmos-2I 63SM carrier rocket was
Blueshift (703 words) [view diff] no match in snippet view article find links to article
applies when photons outside the visible spectrum (e.g., X rays and radio waves) are shifted toward shorter wavelengths, as well as to shifts in the
Cassegrain antenna (1,258 words) [view diff] no match in snippet view article find links to article
secondary reflector suspended in front of the primary reflector. The beam of radio waves from the feed illuminates the secondary reflector, which reflects it
Telecommunication (6,696 words) [view diff] no match in snippet view article find links to article
waves, ultraviolet light, and radio waves. This last channel is called the "free space channel". The sending of radio waves from one place to another has
Radiodetermination (72 words) [view diff] no match in snippet view article find links to article
relating to these parameters, by means of the propagation properties of radio waves. There are two main fields to radiodetermination: radiolocation, which
Radiowaves (107 words) [view diff] no match in snippet view article find links to article
This article is about music album. For the electromagnetic waves, see Radio waves. Radiowaves is the final studio album by Norwegian rock band Seigmen
Radio noise source (57 words) [view diff] no match in snippet view article find links to article
A radio noise source is a device that emits radio waves at a certain frequency, used to calibrate radio telescopes such that received data may be compared
Radiotrope (46 words) [view diff] no match in snippet view article find links to article
radio frequency seeking robots. More accurately, radiotropes can either seek (radiophiles) or flee (radiophobes) sources of radio waves.[citation needed]
Image antenna (379 words) [view diff] no match in snippet view article find links to article
antenna is an electrical mirror-image of an antenna element formed by the radio waves reflecting from a conductive surface called a ground plane, such as the
Project Ozma (353 words) [view diff] no match in snippet view article find links to article
search for signs of life in distant solar systems through interstellar radio waves. The program was named after Princess Ozma, ruler of the fictional land
Vertical plane (192 words) [view diff] no match in snippet view article find links to article
plane to encourage skywave propagation, which would refract or reflect radio waves off the ionosphere and back to the ground at a great distance from the
Horn antenna (2,798 words) [view diff] no match in snippet view article find links to article
that consists of a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are widely used as antennas at UHF and microwave frequencies
Conformal antenna (415 words) [view diff] no match in snippet view article find links to article
microprocessor (computer). By controlling the phase, the nondirectional radio waves emitted by the individual antennas can be made to combine in front of
Radiation pattern (1,634 words) [view diff] no match in snippet view article find links to article
refers to the directional (angular) dependence of the strength of the radio waves from the antenna or other source. Particularly in the fields of fiber
Corner reflector (927 words) [view diff] no match in snippet view article find links to article
square shapes. Radar corner reflectors made of metal are used to reflect radio waves from radar sets. Optical corner reflectors, called corner cubes, made
Counterpoise (ground system) (940 words) [view diff] no match in snippet view article find links to article
sensitive to ground resistance. Because of the large wavelength of the radio waves, the antennas used at these frequencies are electrically short, their
Demeter (satellite) (460 words) [view diff] no match in snippet view article find links to article
invariant latitude. DEMETER observed an increase in ultra low frequency radio waves in the month before the 2010 Haiti earthquake. During the 2010 eruption
Arnold Wilkins (557 words) [view diff] no match in snippet view article find links to article
Wilkins who suggested to his boss, Robert Watson Watt, that reflected radio waves might be used to detect aircraft, and his idea led to the initial steps
Klystron (2,796 words) [view diff] no match in snippet view article find links to article
particle accelerators. In the klystron, an electron beam interacts with the radio waves as it passes through resonant cavities, metal boxes along the length
Driven element (366 words) [view diff] no match in snippet view article find links to article
transmitter, and is the source of the radio waves. In a receiving antenna it collects the incoming radio waves for reception, and converts them to tiny
Surface wave (2,515 words) [view diff] no match in snippet view article find links to article
masses of different densities. Ground waves refer to the propagation of radio waves parallel to and adjacent to the surface of the Earth, following the curvature
Nantenna (2,577 words) [view diff] no match in snippet view article find links to article
which is used to convert radio waves into direct current electricity. Light is composed of electromagnetic waves like radio waves, but of much smaller wavelength
Transmission medium (964 words) [view diff] no match in snippet view article find links to article
constitute a transmission medium for electromagnetic waves such as light and radio waves. While material substance is not required for electromagnetic waves to
Demodulation (1,033 words) [view diff] no match in snippet view article find links to article
audio (sound), but transmitted information in the form of pulses of radio waves that represented text messages in Morse code. So the receiver merely
Construction permit (360 words) [view diff] no match in snippet view article find links to article
and that as many groups as possible have access to free speech over radio waves. In the England and Wales, erecting a radio transmitter would be subject
Conductive keratoplasty (114 words) [view diff] no match in snippet view article find links to article
Conductive keratoplasty (CK) is a type of refractive surgery that uses radio waves to adjust the contour of the cornea by shrinking the corneal collagen
Outline of radio (300 words) [view diff] no match in snippet view article find links to article
radiated waves, such as amplitude, frequency, phase, or pulse width. When radio waves pass an electrical conductor, the oscillating fields induce an alternating
Line-of-sight propagation (1,635 words) [view diff] no match in snippet view article find links to article
"radio horizon". In practice, the propagation characteristics of these radio waves vary substantially depending on the exact frequency and the strength
Non-line-of-sight propagation (4,087 words) [view diff] no match in snippet view article find links to article
visually obstructing material, thus leaving sufficient transmission for radio waves to be detected There are many electrical characteristics of the transmission
Intentional radiator (46 words) [view diff] no match in snippet view article find links to article
intentional radiator is any device that is deliberately designed to produce radio waves. Radio transmitters of all kinds, including the garage door opener, cordless
William Eccles (472 words) [view diff] no match in snippet view article find links to article
theory that a conducting layer of the upper atmosphere could reflect radio waves around the curvature of the Earth, thus enabling their transmission over
Main lobe (269 words) [view diff] no match in snippet view article find links to article
zero. In a directional antenna in which the objective is to emit the radio waves in one direction, the lobe in that direction is designed to be bigger
Prosper-René Blondlot (577 words) [view diff] no match in snippet view article find links to article
that of light. In 1891, he made the first measurement of the speed of radio waves, by measuring the wavelength using Lecher lines. He used 13 different
Magnetosphere of Jupiter (7,901 words) [view diff] no match in snippet view article find links to article
is a powerful source of radio waves in the spectral region stretching from several kilohertz to tens of megahertz. Radio waves with frequencies of less
Radome (898 words) [view diff] no match in snippet view article find links to article
by the antenna. In other words, the radome is transparent to radar or radio waves. Radomes protect the antenna surfaces from weather and conceal antenna
Laser jammer (390 words) [view diff] no match in snippet view article find links to article
these jammers focus on blocking light emitted from laser guns, and not radio waves from radar guns, US federal laws prohibiting the use of radar jammers
Time of arrival (445 words) [view diff] no match in snippet view article find links to article
well defined for vacuum, but is different for all other material when radio waves pass through. Compared to the TDOA technique, time of arrival uses the
Large Millimeter Telescope (691 words) [view diff] no match in snippet view article find links to article
single-aperture telescope in its frequency range, built for observing radio waves in the wave lengths from approximately 0.85 to 4 mm. It has an active
X-ray pulsar-based navigation (221 words) [view diff] no match in snippet view article find links to article
position accurately (±5km). The advantage of using X-ray signals over radio waves is that X-ray telescopes can be made smaller and lighter. SEXTANT (Station
Optics and Spectroscopy (54 words) [view diff] no match in snippet view article find links to article
1956. It covers research on spectroscopy of electromagnetic waves, from radio waves till X-rays, and related topics in optics, including quantum optics.
Dubbed and Freq'd: A Remix Project (75 words) [view diff] no match in snippet view article find links to article
albums Portable Sounds and Tonight. The album art is a mixture of the radio waves from the Portable Sounds album cover mixed with the buildings on the
Broadcast range (1,287 words) [view diff] no match in snippet view article find links to article
service area that a broadcast station or other transmission covers via radio waves (or possibly infrared light, which is closely related). It is generally
Adcock antenna (683 words) [view diff] no match in snippet view article find links to article
vertical elements which can be used to transmit or receive directional radio waves. The Adcock array was invented and patented by British engineer Frank
Curtain array (1,171 words) [view diff] no match in snippet view article find links to article
for long-distance skywave (or skip) transmission; in which a beam of radio waves is transmitted at a shallow angle into the sky, and reflected by the
Ionospheric heater (553 words) [view diff] no match in snippet view article find links to article
transmitters operate in the high frequency (HF) range (3-30 MHz) at which radio waves are reflected from the ionosphere back to the ground. With such facilities
Terrain mask (292 words) [view diff] no match in snippet view article find links to article
positioning the aircraft so there is natural earth hiding it from the radio waves sent from the radar system. For instance, suppose a radar transmitter
Astronomy (8,100 words) [view diff] no match in snippet view article find links to article
amplitude and phase of radio waves, whereas this is not as easily done at shorter wavelengths. Although some radio waves are produced by astronomical
Sutton Common BT Tower (215 words) [view diff] no match in snippet view article find links to article
to interference that may have been caused by the wind turbines to the radio waves.[citation needed] British Telecom microwave network Telecommunications
Skip zone (408 words) [view diff] no match in snippet view article find links to article
When using medium to high frequency radio telecommunication, there are radio waves which travel both parallel to the ground, and towards the ionosphere
Sunset Strip (song) (178 words) [view diff] no match in snippet view article find links to article
vegetable. However, Billy is highly intelligent and gifted, and can hear radio waves in his head. He begins to explore the cordless phone, recognizing its
Batteryless radio (442 words) [view diff] no match in snippet view article find links to article
require a power source at all, except for the power that they receive from radio waves. The line-operated vacuum tube receiver was invented in 1925 by Edward
Sea interferometry (525 words) [view diff] no match in snippet view article find links to article
as Sea-cliff interferometry, is a form of radio astronomy that uses radio waves reflected off the sea to produce an interference pattern. It is the radio
Flare star (878 words) [view diff] no match in snippet view article find links to article
stars. The brightness increase is across the spectrum, from X rays to radio waves. The first known flare stars (V1396 Cygni and AT Microscopii) were discovered
Born approximation (456 words) [view diff] no match in snippet view article find links to article
incident field, in the scatterer. For example, the radar scattering of radio waves by a light styrofoam column can be approximated by assuming that each
Merle Tuve (772 words) [view diff] no match in snippet view article find links to article
University Applied Physics Laboratory. He was a pioneer in the use of pulsed radio waves whose discoveries opened the way to the development of radar and nuclear
Bo Thidé (491 words) [view diff] no match in snippet view article find links to article
Thidé (born in Gothenburg, Sweden) is a Swedish physicist who studies radio waves and other electromagnetic radiation in space, particularly their interaction
Corner reflector antenna (503 words) [view diff] no match in snippet view article find links to article
on the 144, 420, and 1296 MHz bands. They radiate linearly polarized radio waves and can be mounted for either horizontal or vertical polarization. The
Antenna gain (1,467 words) [view diff] no match in snippet view article find links to article
power into radio waves headed in a specified direction. As a receiving antenna, the figure describes how well the antenna converts radio waves arriving
FM broadcast band (2,572 words) [view diff] no match in snippet view article find links to article
widespread even in North America until the 1960s. Frequency-modulated radio waves can be generated at any frequency. All the bands mentioned in this article
Radar configurations and types (1,194 words) [view diff] no match in snippet view article find links to article
Chirp transmitter Search radars scan a wide area with pulses of short radio waves. They usually scan the area two to four times a minute. The waves are
Pictor A (129 words) [view diff] no match in snippet view article find links to article
constellation Pictor, is a double-lobed radio galaxy and a powerful source of radio waves in the Southern Celestial Hemisphere. From a supermassive black hole
Lecher lines (1,815 words) [view diff] no match in snippet view article find links to article
of parallel wires or rods that were used to measure the wavelength of radio waves, mainly at UHF and microwave frequencies. They form a short length of
Sigma Coronae Borealis (435 words) [view diff] no match in snippet view article find links to article
and are classed as RS Canum Venaticorum variables. The system emits radio waves. Much further away, at a distance of 14,000 astronomical units (AU),
Dielectric resonator (1,368 words) [view diff] no match in snippet view article find links to article
material, usually ceramic, that is designed to function as a resonator for radio waves, generally in the microwave and millimeter wave bands. The microwaves
Cordless (247 words) [view diff] no match in snippet view article find links to article
"wireless" generally refers to devices that use some form of energy (e.g., radio waves, infrared, ultrasonic, etc.) to transfer information or commands over
Auroral chorus (325 words) [view diff] no match in snippet view article find links to article
responsible for the auroras. The electromagnetic waves are a type of Natural radio waves, vibrations of electric and magnetic energy occurring at the same frequency
Cosmic noise (221 words) [view diff] no match in snippet view article find links to article
from Earth, emit electromagnetic waves in its full spectrum including radio waves. We can also hear the fall of a meteorite in a radio receiver; as the
Luxemburg–Gorky effect (150 words) [view diff] no match in snippet view article find links to article
Luxemburg–Gorky effect is a phenomenon of cross modulation between two radio waves, one of which is strong, passing through the same part of a medium, especially
Radar gun (2,253 words) [view diff] no match in snippet view article find links to article
light, f is the emitted frequency of the radio waves and Δf is the difference in frequency between the radio waves that are emitted and those received back
Radionics (1,169 words) [view diff] no match in snippet view article find links to article
disease can be diagnosed and treated with a kind of energy similar to radio waves. The concept behind radionics originated in the early 1900s with Albert
Compact intracloud discharge (56 words) [view diff] no match in snippet view article find links to article
bipolar event (NBE), is an intensive form of lightning that produces radio waves and no visible light. Lasting only a few millionths of a second, these
Parabolic microphone (216 words) [view diff] no match in snippet view article find links to article
the same way that a parabolic antenna (e.g., satellite dish) does with radio waves. Parabolic microphones have great sensitivity to sounds in one direction
Baby monitor (874 words) [view diff] no match in snippet view article find links to article
with a microphone, placed near to the child. It transmits the sounds by radio waves to a receiver unit with a speaker carried by, or near to, the person
Pulsar (4,958 words) [view diff] no match in snippet view article find links to article
interstellar plasma, lower-frequency radio waves travel through the medium slower than higher-frequency radio waves. The resulting delay in the arrival
Rhythmic contemporary (491 words) [view diff] no match in snippet view article find links to article
Rhythmic (chart) List of number-one Rhythmic hits (United States) "RADIO WAVES / Polling the Kiddies To Grab More Ads". Newsday.  BDS Rhythmic reporting
Electromagnetic shielding (1,483 words) [view diff] no match in snippet view article find links to article
also known as RF shielding. The shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. A conductive enclosure
Thomas Eckersley (159 words) [view diff] no match in snippet view article find links to article
remainder of his career. He devoted most of his career to research into radio waves reflected downwards from the Heaviside layer and how they interfered
Denpa teki na Kanojo (363 words) [view diff] no match in snippet view article find links to article
Year Awards in 2003. The Japanese term denpa originally referred to radio waves, but in slang usage it refers to people who perceive things sane people
Light (5,561 words) [view diff] no match in snippet view article find links to article
whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light. Like all types of light, visible light is emitted and
Radar altimeter (1,997 words) [view diff] no match in snippet view article find links to article
beneath an aircraft or spacecraft by timing how long it takes a beam of radio waves to reflect from the ground and return to the plane. This type of altimeter
Tactical Data Link (218 words) [view diff] no match in snippet view article find links to article
(TDL) uses a data link standard in order to provide communication via radio waves or cable used by the U.S. armed forces and NATO nations. All military
Duke University (12,953 words) [view diff] no match in snippet view article find links to article
7 fm: Station. WXDU. Retrieved July 4, 2011. Raleigh-Durham Radio Waves. RDU Radio Waves. Retrieved June 21, 2011. "ACC Champions" (PDF). 2007 Atlantic
History of radio (9,177 words) [view diff] no match in snippet view article find links to article
is the history of technology that produced radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions
Technical surveillance counter-measures (678 words) [view diff] no match in snippet view article find links to article
information, whether data, video, or voice, through the air by using radio waves. The standard counter-measure for bugs of this nature is to search for
Hydrogen line (1,790 words) [view diff] no match in snippet view article find links to article
spectrum, and it is observed frequently in radio astronomy, since those radio waves can penetrate the large clouds of interstellar cosmic dust that are opaque
Waveguide (1,533 words) [view diff] no match in snippet view article find links to article
meaning is a hollow conductive metal pipe used to carry high frequency radio waves, particularly microwaves. The geometry of a waveguide reflects its function
Tyndall effect (836 words) [view diff] no match in snippet view article find links to article
wavelength dependency is that longwave electromagnetic waves such as radio waves are able to pass through the walls of buildings, while shortwave electromagnetic
General Electric Building (333 words) [view diff] no match in snippet view article find links to article
burst of Gothic tracery, which is supposed to represent electricity and radio waves, and is lit from within at night. General Electric Building
Attenuation (2,122 words) [view diff] no match in snippet view article find links to article
waves and signals in electrical circuits, in optical fibers, and in air (radio waves). In many cases, attenuation is an exponential function of the path
Radio star (321 words) [view diff] no match in snippet view article find links to article
microwaves. The Sun, the nearest star to the Earth, is known to emit radio waves, though it is virtually the only regular star that has been detected
Nançay radio telescope (451 words) [view diff] no match in snippet view article find links to article
consists of ten panels, each 20 m long and 40 m (131 ft) high; it reflects radio waves towards the fixed secondary mirror 460 m to the south. The secondary
Radio propagation model (764 words) [view diff] no match in snippet view article find links to article
under similar constraints. Created with the goal of formalizing the way radio waves are propagated from one place to another, such models typically predict
Radiodensity (500 words) [view diff] no match in snippet view article find links to article
orbital electrons. Diagnostic X-rays are produced using X-ray tubes. The radio waves portion of the electromagnetic spectrum represents much lower energy/frequency
Madrid Deep Space Communications Complex (246 words) [view diff] no match in snippet view article find links to article
very-long-baseline interferometry) observations. Measure variations in radio waves for radio science experiments. Monitor and control the performance of
PSR B0943+10 (470 words) [view diff] no match in snippet view article find links to article
for a pulsar. It has a rotational period of 1.1 seconds and emits both radio waves and X-rays. Ongoing research at the University of Vermont discovered
T Tauri (651 words) [view diff] no match in snippet view article find links to article
wavelengths; the other two shine in the infrared and one of them also emits radio waves. Through VLA radio observations, it was found that the young star (the
Near vertical incidence skywave (1,067 words) [view diff] no match in snippet view article find links to article
broadcasting, especially in the tropics, and by radio amateurs. The radio waves travel near-vertically upwards into the ionosphere, where they are refracted
Astrophysical jet (1,181 words) [view diff] no match in snippet view article find links to article
Also, the plasma emits various forms of radiation such as X-rays and radio waves, which aid diagnosis. Relativistic jets are extremely powerful
Feed line (807 words) [view diff] no match in snippet view article find links to article
current from the transmitter to the antenna, where it is radiated as radio waves. In a receiving antenna it transfers the tiny RF voltage induced in the
Very-long-baseline interferometry (1,536 words) [view diff] no match in snippet view article find links to article
VLBI technique measures the time differences between the arrival of radio waves at separate antennas, it can also be used "in reverse" to perform earth
Waveguide (electromagnetism) (2,422 words) [view diff] no match in snippet view article find links to article
original and most common meaning is a hollow metal pipe used to carry radio waves. This type of waveguide is used as a transmission line mostly at microwave
Patch antenna (1,518 words) [view diff] no match in snippet view article find links to article
transmission line with a length of approximately one-half wavelength of the radio waves. The radiation mechanism arises from discontinuities at each truncated
Wireless power (7,979 words) [view diff] no match in snippet view article find links to article
electromagnetic energy they use: time varying electric fields, magnetic fields, radio waves, microwaves, or infrared or visible light waves. In general a wireless