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Radio Frequency Power Transmission
Radio frequency power transmission is the transmission of the output power of a transmitter to an antenna. When the antenna is not situated close to the transmitter, special transmission lines are required. The most common type of transmission line for this purpose is large-diameter coaxial cable. At high-power transmitters, cage lines are used. Cage lines are a kind of overhead line similar in construction to coaxial cables. The interior conductor is held by insulators mounted on a circular device in the middle. On the circular device, there are wires for the other pole of the line. Cage lines are used at high-power transmitters in Europe, like longwave transmitter Topolna, longwave-transmitter Solec Kujawski and some other high-power transmitters for long-, medium- and shortwave. For UHF and VHF, Goubau lines are sometimes used. They consist of an insulated single wire mounted on insulators. On a Goubau line, the wave travels as longitudinal currents surrounded by transverse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solec Kujawski Longwave Antenna Feeder
Solec may refer to several places in Poland: *Solec, Warsaw, a neighbourhood in Śródmieście, Warsaw *Solec, Łódź Voivodeship (central Poland) *Solec, Gostynin County in Masovian Voivodeship (east-central Poland) *Solec, Piaseczno County in Masovian Voivodeship (east-central Poland) *Solec, Środa Wielkopolska County in Greater Poland Voivodeship (west-central Poland) *Solec, Wolsztyn County in Greater Poland Voivodeship (west-central Poland) *Solec, Opole Voivodeship (south-west Poland) *Solec Kujawski, a town in Kuyavian-Pomeranian Voivodeship (northern Poland) *Solec Kujawski Commune, a gmina (administrative district) in Kuyavian-Pomeranian Voivodeship (northern Poland) *Solec nad Wisłą Solec nad Wisłą is a town in Lipsko County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina (administrative district) called Gmina Solec nad Wisłą. It lies approximately east of Lipsko and south-east of Warsaw. T ..., a village on the Vistula river in Mas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmitter
In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna (radio), antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the Antenna (radio), antenna. When excited by this alternating current, the antenna radiates radio waves. Transmitters are necessary component parts of all electronic devices that communicate by radio communication, radio, such as radio broadcasting, radio and television broadcasting stations, cell phones, walkie-talkies, Wireless LAN, wireless computer networks, Bluetooth enabled devices, garage door openers, two-way radios in aircraft, ships, spacecraft, radar sets and navigational beacons. The term ''transmitter'' is usually limited to equipment that generates radio waves for Communication engineering, communication purposes; or radiolocation, such as radar and navigational transmitters. Generators of radio waves for heatin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antenna (radio)
In radio engineering, an antenna or aerial is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver. In transmission, a radio transmitter supplies an electric current to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic wave In physics, electromagnetic radiation (EMR) consists of waves of the electromagnetic (EM) field, which propagate through space and carry momentum and electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visib ...s (radio waves). In Receiver (radio), reception, an antenna intercepts some of the power of a radio wave in order to produce an electric current at its terminals, that is applied to a receiver to be Amplifier, amplified. Antennas are essential components of all radio equipment. An antenna is an array of conductor (material), conductors (Driven element, elements), elect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmission Line
In electrical engineering, a transmission line is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner. The term applies when the conductors are long enough that the wave nature of the transmission must be taken into account. This applies especially to radio-frequency engineering because the short wavelengths mean that wave phenomena arise over very short distances (this can be as short as millimetres depending on frequency). However, the theory of transmission lines was historically developed to explain phenomena on very long telegraph lines, especially submarine telegraph cables. Transmission lines are used for purposes such as connecting radio transmitters and receivers with their antennas (they are then called feed lines or feeders), distributing cable television signals, trunklines routing calls between telephone switching centres, computer network connections and high speed computer data buses. RF engineers commonly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coaxial Cable
Coaxial cable, or coax (pronounced ) is a type of electrical cable consisting of an inner conductor surrounded by a concentric conducting shield, with the two separated by a dielectric ( insulating material); many coaxial cables also have a protective outer sheath or jacket. The term ''coaxial'' refers to the inner conductor and the outer shield sharing a geometric axis. Coaxial cable is a type of transmission line, used to carry high-frequency electrical signals with low losses. It is used in such applications as telephone trunk lines, broadband internet networking cables, high-speed computer data busses, cable television signals, and connecting radio transmitters and receivers to their antennas. It differs from other shielded cables because the dimensions of the cable and connectors are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a transmission line. Coaxial cable was used in the first (1858) and followin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europe1 Reusenleitung 23082016 7
Europe 1, formerly known as Europe n° 1, is a privately owned radio station created in 1955. Owned and operated by Lagardère Active, a subsidiary of the Lagardère Group, it is one of the leading radio broadcasting stations in France and its programmes can be received throughout the country. In January 2022 the conservative media mogul Vincent Bolloré took over the station. History In 1955, to circumvent the prohibition of commercial broadcasting in France after the Second World War, Europe n° 1 was established in the Saarland, a German state that borders France and Luxembourg. Transmissions were not legally authorised, however, until France's post-war administration of the Saarland ceased and sovereignty returned to West Germany in 1957; so, during its first two years (1955–1957), under the direction of Louis Merlin, who had defected from Radio Luxembourg, Europe n° 1 was a pirate radio station. In 1959 the French government bought part of the broadcasting corporation, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Longwave-transmitter Solec Kujawski
The Longwave transmitter Solec Kujawski is a longwave broadcasting facility of the Polish Radio for the AM-LW (long wave) 225 kHz frequency/1333 meters wavelength. Its construction was necessary after the collapse of the Warsaw radio mast on August 8, 1991 and the resistance of the local population to its reconstruction. Tower Height 948 feet/289 meters and 1080 feet/330 meters. Height above sea level 209 feet/64 meters MSL (Mean Sea Level). The transmitter was built in 1998/99 on a former military area near Solec Kujawski. The area was originally a hamlet called Kabat (Grosswalde) until World War II, when the Germans established a military artillery and rocket training ground in the area. The transmitter in this facility has a power of 1200 kilowatts (used 1000 kW) and is equipped with MOSFET amplifiers. The carrier frequency is, as in earlier days in the transmitter Konstantynow, generated by a set of twin high-accuracy thermally-stabilized quartz oscillators. It u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goubau Line
A Goubau line or Sommerfeld–Goubau line, or G-line for short, is a single-wire transmission line used to conduct radio waves at UHF and microwave frequencies. The dielectric coated transmission line was invented by F. Harms cited i Stulle, Bergoz 2012 ''The Goubau line'', p.148/ref> in 1907 and George J. E. Goubau cited i Stulle, Bergoz 2012 ''The Goubau line'', p.148/ref> in 1950, based on work on surface waves on wires from 1899 by Arnold Sommerfeld. cited i Stulle, Bergoz 2012 ''The Goubau line'', p.148/ref> It is used as a feedline at UHF to link high frequency transmitters and receivers to their antennas, and in scientific research. Description The ''Goubau line'' itself consists of a single wire conductor coated with dielectric material. Coupling to and from the G-line is done with conical metal "launchers" or "catchers", with their narrow ends connected for example to the shield of coaxial feed line, and with the transmission line passing through a hole in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microwave
Microwave is a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter corresponding to frequencies between 300 MHz and 300 GHz respectively. Different sources define different frequency ranges as microwaves; the above broad definition includes both UHF and EHF (millimeter wave) bands. A more common definition in radio-frequency engineering is the range between 1 and 100 GHz (wavelengths between 0.3 m and 3 mm). In all cases, microwaves include the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum. Frequencies in the microwave range are often referred to by their IEEE radar band designations: S, C, X, Ku, K, or Ka band, or by similar NATO or EU designations. The prefix ' in ''microwave'' is not meant to suggest a wavelength in the micrometer range. Rather, it indicates that microwaves are "small" (having shorter wavelengths), compared to the radio waves used prior to microwave te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waveguide
A waveguide is a structure that guides waves, such as electromagnetic waves or sound, with minimal loss of energy by restricting the transmission of energy to one direction. Without the physical constraint of a waveguide, wave intensities decrease according to the inverse square law as they expand into three-dimensional space. There are different types of waveguides for different types of waves. The original and most common meaningInstitute of Electrical and Electronics Engineers, “The IEEE standard dictionary of electrical and electronics terms”; 6th ed. New York, N.Y., Institute of Electrical and Electronics Engineers, c1997. IEEE Std 100-1996. d. Standards Coordinating Committee 10, Terms and Definitions; Jane Radatz, (chair)/ref> is a hollow conductive metal pipe used to carry high frequency radio waves, particularly microwaves. Dielectric waveguides are used at higher radio frequencies, and transparent dielectric waveguides and optical fibers serve as waveguides f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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