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Communications antenna installation
Category：Industry News Publish：2019-6-11 15:57:05 Browse：2779
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The antenna installation should pay attention to the following questions:
(1) lateral directional antenna tower installation: in order to reduce the influence of antenna tower on antenna directivity diagram, the installation should be paid attention to: when the distance of the center of the directional antenna to the Eiffel Tower is lambda / 4 or 3 lambda / 4, the biggest directional outside the tower can be obtained.
(2) the omni-directional antenna tower side installation: in order to reduce the influence of antenna tower on antenna directivity diagram, in principle, the antenna tower can't become a reflector antenna. So in the installation, antenna should be installed on the edges and corners, and make the antenna with any part of the tower recent distance is greater than the lambda.
(3) multiple antenna tower: as far as possible to reduce the coupling between the different network to send and receive letters antenna effect and influence each other, try to increase the isolation between antennas, the best solution is to increase the distance between each other. Antenna tower, should first adopt vertical installation.
(4) for traditional literal antenna (vertical polarization), because the antenna (RX and TX, TX - TX) between the isolation degree (30 db or higher) and the requirements of space diversity technology, requirements have vertical and horizontal distance between antennas, generally is about 50 cm vertical distance, horizontal distance of about 4.5 m, then must increase infrastructure investment, to expand the installation of the antenna platform, and for dual polarized antenna (plus or minus 45 ° polarization), as a result of plus or minus 45 ° polarization orthogonality can guarantee + 45 ° and 45 ° the isolation between the two antennas satisfy the requirement of intermodulation of isolation between antennas (30 db) or higher, so the space between the dual polarized antenna interval only 20 to 30 cm, mobile base station can don't have to build the tower, only need to build another pillar of iron 20 cm in diameter, will cover the corresponding dual polarized antenna direction can be fixed on the iron pole.
(1) lateral directional antenna tower installation: in order to reduce the influence of antenna tower on antenna directivity diagram, the installation should be paid attention to: when the distance of the center of the directional antenna to the Eiffel Tower is lambda / 4 or 3 lambda / 4, the biggest directional outside the tower can be obtained.
(2) the omni-directional antenna tower side installation: in order to reduce the influence of antenna tower on antenna directivity diagram, in principle, the antenna tower can't become a reflector antenna. So in the installation, antenna should be installed on the edges and corners, and make the antenna with any part of the tower recent distance is greater than the lambda.
(3) multiple antenna tower: as far as possible to reduce the coupling between the different network to send and receive letters antenna effect and influence each other, try to increase the isolation between antennas, the best solution is to increase the distance between each other. Antenna tower, should first adopt vertical installation.
(4) for traditional literal antenna (vertical polarization), because the antenna (RX and TX, TX - TX) between the isolation degree (30 db or higher) and the requirements of space diversity technology, requirements have vertical and horizontal distance between antennas, generally is about 50 cm vertical distance, horizontal distance of about 4.5 m, then must increase infrastructure investment, to expand the installation of the antenna platform, and for dual polarized antenna (plus or minus 45 ° polarization), as a result of plus or minus 45 ° polarization orthogonality can guarantee + 45 ° and 45 ° the isolation between the two antennas satisfy the requirement of intermodulation of isolation between antennas (30 db) or higher, so the space between the dual polarized antenna interval only 20 to 30 cm, mobile base station can don't have to build the tower, only need to build another pillar of iron 20 cm in diameter, will cover the corresponding dual polarized antenna direction can be fixed on the iron pole.
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