Перевод и анализ слов искусственным интеллектом ChatGPT
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- как употребляется слово
- частота употребления
- используется оно чаще в устной или письменной речи
- варианты перевода слова
- примеры употребления (несколько фраз с переводом)
- этимология
Что (кто) такое folded antenna - определение
![Olfactory receptors (scales and holes) on the antenna of the butterfly ''[[Aglais io]]'', electron micrograph](https://commons.wikimedia.org/wiki/Special:FilePath/Tykadlo.jpg?width=200 "Olfactory receptors (scales and holes) on the antenna of the butterfly ''[[Aglais io]]'', electron micrograph")
![Electron micrograph]] of antenna surface detail of a wasp ''([[Vespula vulgaris]])''](https://commons.wikimedia.org/wiki/Special:FilePath/Vespula vulgaris SEM Antenna 03.jpg?width=200 "Electron micrograph]] of antenna surface detail of a wasp ''([[Vespula vulgaris]])''")
![A wire antenna kit, with a coil of wire, [[strain insulator]]s and a [[balun]]. When installed the wire is supported by buildings or trees using the insulators to prevent a short circuit to ground.](https://commons.wikimedia.org/wiki/Special:FilePath/Long-wire-and-balun-0a.jpg?width=200 "A wire antenna kit, with a coil of wire, [[strain insulator]]s and a [[balun]]. When installed the wire is supported by buildings or trees using the insulators to prevent a short circuit to ground.")
![Atmospheric noise as a function of frequency in the LF, MF, and HF radio spectrum according to CCIR 322. The vertical axis is in [[decibel]]s above the [[thermal noise]] floor. It can be seen that as frequency drops atmospheric noise dominates other sources.](https://commons.wikimedia.org/wiki/Special:FilePath/Atmosphericnoise.PNG?width=200 "Atmospheric noise as a function of frequency in the LF, MF, and HF radio spectrum according to CCIR 322. The vertical axis is in [[decibel]]s above the [[thermal noise]] floor. It can be seen that as frequency drops atmospheric noise dominates other sources.")
![500 kHz / 600 m]] transmitter in a French [[coastguard]] station.](https://commons.wikimedia.org/wiki/Special:FilePath/Boîte de couplage émetteur 500kHz.jpg?width=200 "500 kHz / 600 m]] transmitter in a French [[coastguard]] station.")
.png?width=200 "Removing the optional ground on the balanced (right) side of the circuit does require the dual-section variable capacitor to be mounted so that it can electrically \"float\", with its frame and tuning shaft insulated from the chassis and tuning knob. When such insulated mounting is provided, there is no reason to use a dual-section capacitor and it can be replaced by a less expensive single-section capacitor.
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![ferrite]] toroid.](https://commons.wikimedia.org/wiki/Special:FilePath/T200A2.jpg?width=200 "ferrite]] toroid.")
![A 300-to-75-ohm TV line [[balun]], showing a coaxial connector (balun inside) on the left with [[twin-lead]] trailing off to the right](https://commons.wikimedia.org/wiki/Special:FilePath/Tvbalun.jpg?width=200 "A 300-to-75-ohm TV line [[balun]], showing a coaxial connector (balun inside) on the left with [[twin-lead]] trailing off to the right")
![Ω]] "window line"; not exactly ''ladder line'' or ''[[twin-lead]]'', but sometimes called that. The rectangular hole shown in the insulation between the wires is one of the line's "windows".}}](https://commons.wikimedia.org/wiki/Special:FilePath/Window line 2.png?width=200 "Ω]] \"window line\"; not exactly ''ladder line'' or ''[[twin-lead]]'', but sometimes called that. The rectangular hole shown in the insulation between the wires is one of the line's \"windows\".}}")
Википедия
A monopole antenna is a class of radio antenna consisting of a straight rod-shaped conductor, often mounted perpendicularly over some type of conductive surface, called a ground plane. The driving signal from the transmitter is applied, or for receiving antennas the output signal to the receiver is taken, between the lower end of the monopole and the ground plane. One side of the antenna feedline is attached to the lower end of the monopole, and the other side is attached to the ground plane, which is often the Earth. This contrasts with a dipole antenna which consists of two identical rod conductors, with the signal from the transmitter applied between the two halves of the antenna.
The monopole is often used as a resonant antenna. The rod functions as an open resonator for radio waves and oscillates with standing waves of voltage and current along its length. The length of the antenna, therefore, is determined based on the wavelength of the desired radio waves. The most common form is the quarter-wave monopole, in which the antenna length is approximately one quarter of the wavelength of the radio waves. In broadcasting monopole antennas, however, a length equal to 5/8 = 0.625×wavelength are also popular because at this length a monopole radiates a maximum amount of its power in horizontal directions. The monopole antenna was invented in 1895 by radio pioneer Guglielmo Marconi; for this reason it is sometimes called the Marconi antenna.
The load impedance of the quarter-wave monopole is half that of the dipole antenna or 37.5 Ohms.
Common types of monopole antenna are
