Homebrew Sector Antenna for Wifi ISM band (2,4GHz) O n this page you will find information on how I build a sector antenna for de Wifi 2,4GHz ISM band.

Typical GSM sector antenna outdoor unit A sector antenna is a type of with a -shaped. 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 full-circle coverage is required (see photos below). The largest use of these antennas is as antennas for.

They are also used for other types of, for example in networks. They are used for limited-range distances of around 4 to 5 km.

Horizontal and vertical radiation patterns. Graphics Card Windows 8. The antenna radiates a horizontal fan-shaped beam, sharp in the vertical axis so it doesn't spill over into neighboring sectors.

A typical sector antenna is depicted in the figure on the right. At the bottom, there are for (), and adjustment mechanisms. For its outdoor placement, the main is produced from, and all internal parts are housed into a enclosure to keep its operation stable regardless of weather conditions. Is very important for an outdoor antenna so all metal parts are -grounded.

The antenna's long narrow form gives it a fan-shaped, wide in the horizontal direction and relatively narrow in the vertical direction. According to the radiation patterns depicted, typical antennas used in a three-sector have 66° of horizontal. This means that the signal strength at the ±33° directions is half (3 dB down) from its peak value at the center. At the ±60° directions, it is suggested to be a border of a sector and antenna gain is negligible there. Vertical beamwidth is not wider than 15°, meaning 7.5° in each direction. Unlike antennas for - AM, FM and television for example - which must achieve over many miles or kilometers, there is usually a downward or downtilt so that the base station can more effectively cover its immediate area and not cause to distant cells.

The, which is determined by the projection of the radiation pattern on the ground, can be adjusted by changing the downtilt of the pattern Tai Game Virtual City Tycoon Crack on this page. . In some models this is done mechanically by manually adjusting the tilt of the antenna with an adjustable mounting bracket. Save The Last Dance 2 Streaming Ita. In more recent sector antennas the pattern can be electronically tilted, by adjustable in the feed of the individual dipole elements. These are adjusted by a circuit from the ground, eliminating the need for a technician to climb the antenna tower. Sector antennas are often installed on existing structures. To increase or widen the coverage area, and thus the number of served clients, several sector antennas are installed on the same supporting structure, e.g..