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  2. Near vertical incidence skywave - Wikipedia

    en.wikipedia.org/wiki/Near_Vertical_Incidence...

    An NVIS antenna configuration is a horizontally polarized (parallel with the surface of the earth) radiating element that is from ⁠ 1 / 20 ⁠ th wavelength to ⁠ 1 / 4 ⁠ wave above the ground. The optimum height of such an antenna is about ⁠ 1 / 4 ⁠ wavelength, and high angle radiation declines only slightly for heights up to about ...

  3. 40-meter band - Wikipedia

    en.wikipedia.org/wiki/40-meter_band

    A HB9XBG Full Size Vertical Antenna for the 40m-band on Simplon Pass with view to Mount Fletschhorn. The 40-meter or 7-MHz band is an amateur radio frequency band, spanning 7.000-7.300 MHz in ITU Region 2, and 7.000-7.200 MHz in Regions 1 & 3. It is allocated to radio amateurs worldwide on a primary basis; however, only 7.000-7.200 MHz is ...

  4. Fixed wireless - Wikipedia

    en.wikipedia.org/wiki/Fixed_wireless

    Fixed wireless services typically use a directional radio antenna on each end of the signal (e.g., on each building). These antennas are generally larger than those seen in Wi-Fi setups and are designed for outdoor use. Several types of radio antennas are available that accommodate various weather conditions, signal distances and bandwidths.

  5. Long-range Wi-Fi - Wikipedia

    en.wikipedia.org/wiki/Long-range_Wi-Fi

    A typical wireless router in an indoor point-to-multipoint arrangement using 802.11n and a stock antenna might have a range of 50 metres (160 ft) or less. Outdoor point-to-point arrangements, through use of directional antennas, can be extended with many kilometers between stations.

  6. Sector antenna - Wikipedia

    en.wikipedia.org/wiki/Sector_antenna

    Typical GSM sector antenna outdoor unit. A sector antenna is a type of directional microwave antenna with a sector-shaped radiation pattern.The word "sector" is used in the geometric sense; some portion of the circumference of a circle measured in degrees of arc. 60°, 90° and 120° designs are typical, often with a few degrees 'extra' to ensure overlap and mounted in multiples when wider or ...

  7. Distributed antenna system - Wikipedia

    en.wikipedia.org/wiki/Distributed_antenna_system

    A distributed antenna system (DAS) is a network of spatially separated antenna nodes connected to a common source via a transport medium that provides wireless service within a geographic area or structure. DAS antenna elevations are generally at or below the clutter level, and node installations are compact. A distributed antenna system may be ...

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