antenna factor

КПД антенны

English-Russian dictionary of Information technology. 2005.

Смотреть что такое "antenna factor" в других словарях:

  • Antenna factor — In telecommunications, the antenna factor AF (unit: 1/m) is defined as the ratio of the incident electromagnetic field strength E (units: V/m or µV/m) to the voltage V (units: V or µV) on the line connection of an antenna:: AF = frac EVIf all… …   Wikipedia

  • Antenna gain — is defined as the ratio of the radiation intensity of an antenna in a given direction, to the intensity of the same antenna as it radiates in all directions (isotropically). Since the radiation intensity of an isotropically radiated power is… …   Wikipedia

  • Antenna (radio) — Whip antenna on car …   Wikipedia

  • Antenna tuner — An antenna tuner, transmatch, or antenna tuning unit (ATU) matches a transceiver with a fixed impedance (typically 50 ohms for modern transceivers) to a load (feed line and antenna) impedance which is unknown, complex or otherwise does not match …   Wikipedia

  • Microstrip antenna — In telecommunication, there are several types of microstrip antennas (also known as printed antennas) the most common of which is the microstrip patch antenna or patch antenna. A patch antenna is a narrowband, wide beam antenna fabricated by… …   Wikipedia

  • Patch antenna — A patch antenna is a popular antenna type, which gains its name from the fact that it basically consists of a metal patch suspended over a ground plane. The assembly is usually contained in a plastic radome, which protects the structure from… …   Wikipedia

  • Distributed Antenna System — DAS diagram A typical DAS node for the Videotron 3G netwo …   Wikipedia

  • Dipole antenna — A schematic of a half wave dipole antenna connected to an unbalanced coaxial cable. Better practice is to connect the balanced dipole to the unbalanced line with a balun. A dipole antenna is a radio antenna that can be made of a simple wire, with …   Wikipedia

  • Parabolic antenna — A parabolic satellite communications antenna at Erdfunkstelle Raisting, the biggest facility for satellite communication in the world, in Raisting, Bavaria, Germany. It has a Cassegrain type feed. A parabolic antenna is an antenna that uses a… …   Wikipedia

  • Crossed field antenna — A crossed field antenna, or CFA, is a type of antenna for long and mediumwave broadcasting, patented in 1986, which was claimed to have the same efficiency as a conventional antenna but only one tenth the overall height. The invention was… …   Wikipedia

  • Helical antenna — Helical antennas can operate in one of two principal modes: normal (broadside) mode or axial (or endfire) mode.In the normal mode , the dimensions of the helix are small compared with the wavelength. The far field radiation pattern is similar to… …   Wikipedia

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