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axial-symmetric antenna

См. также в других словарях:

  • Offset dish antenna — Main types of parabolic antennas An offset dish antenna is a type of parabolic antenna. It is so called because the antenna feed is offset to the side of the reflector, in contrast to a typical axial fed parabolic antenna where the feed is in… …   Wikipedia

  • Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra …   Wikipedia

  • Dipole — This article is about the electromagnetic phenomenon. For other uses, see dipole (disambiguation). The Earth s magnetic field, approximated as a magnetic dipole. However, the N and S (north and south) poles are labeled here geographically, which… …   Wikipedia

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