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What are the classification of the antenna
Oct 13, 2017

Rod / whip antenna

Rod-like / whip-like antenna is generally omnidirectional antenna, that is, in the horizontal direction of the performance of 360 ° are uniform radiation, that is, often said no direction, the general gain is not. This type of antenna is used throughout the use of too many special requirements, such as home Wi-Fi, radio, mobile communication system in the suburbs of the district system such as the use of the station is very common. (Improved antenna radiation method)

Ceiling antenna

Ceiling antenna is a mobile communication system antenna, mainly for indoor signal cover, such as venue, hotels, office buildings, cinemas, residential buildings and so on. Now the market to see the indoor ceiling antenna, shape a lot of patterns, but the purchase of its core is simply the same.

The general antenna will be moving or Unicom brand trademark, the general one can see that the operator of the signal in the cover. White downward projection is the antenna body, outward radiation signal, the rear side of the cable for the feeder, the signal from the mobile base station into the antenna.

Walled antenna

This kind of walled antenna belongs to the air medium type microstrip antenna, has a strong direction, the gain is large, the appearance is beautiful, in some relatively narrow interior space, the antenna device in front of the area can not have the object block, and not On the windows, doors and other signals easier to leak out to the outdoor openings, the main device in the room, hall, corridor and other places on the wall. The gain of the wall antenna is higher than that of the ceiling antenna, usually between 6 and 10 dB. High-speed non-parking fee system is also a major use. (Antenna intermodulation results affect the elements)

Yagi antenna attributed to the higher gain of the directional antenna, by the Northeast University of Japan's eight wood show and Yutian too two people to create, with high gain, light structure, set up convenience, cheap and so on. Thus, it is particularly suitable for point-to-point communication where outdoor signals may be introduced into the room, for example, it is the preferred type of outdoor acceptance system for indoor dispersal systems. For example, a regional indoor mobile phone signal is particularly weak to expect improvement, Yagi antenna is the first.

Yagi antenna unit number more, the higher the gain, usually choose 6 to 12 units of the Yagi directional antenna, the gain up to 10 ~ 15dB.

Base station plate antenna

Base station plate antenna is the most widely used and extremely important base station antenna, attributed to a directional antenna. The advantages of this antenna are: high gain, fan-shaped area of the map is good, the back valve is small, vertical surface angle depression control convenience, sealing function and long service life. Its selection and setting is relatively messy, according to the cover requirements, traffic distribution, anti-interference requirements, etc., need to strictly adjust the down angle, direction angle, antenna hanging high, antenna diversity interval and barrier interval and other parameters.

Conventional base station plate antenna, its gain is about 14 ~ 17dB, lengthened base station plate antenna, the gain of up to 16 ~ 19dB, it is clear that the length of the lengthened type, for the conventional plate antenna twice as much as 2.4 m The

High gain parabolic antenna

Because the paraboloid has an outstanding focusing effect, the parabolic antenna is capable of strong, 1.5 m diameter parabolic antenna with a gain of up to 20 dB. Radar in the launch of the energy should be set to radiation to the direction of the need to illuminate, and in the acceptance as much as possible only accept the echo direction of exploration, together to distinguish the direction and elevation of the policy, so the antenna shape in the radar or satellite system Very common. Some parabolic use of grid-like structure, one is to reduce the weight of the antenna, the second is to reduce the wind resistance. (Improved antenna radiation method)

SBX-1 sea-based X-band radar antenna

Due to the connection of the Earth's curvature, fixed radar can cover up the scale of a great constraint. "Sea Giant Eye" The SBX-1 sea-based X-band radar includes many small radar hoods and a heavy 1814-tonne phase array radar antenna. This phase array radar antenna requires more than one million watts of power to operate, with more than 30,000 units to send T / R module, covering an area of 384 square meters, to be able to search and track the policy. But also and the US military can be located in California Vandenberg Air Force Base missile protection system, located in Alaska Lilbao base exchange of information, the two bases have blocked, shot down the missile's ability.