A High Gain and Large Downtilt Electronically Adjustable Antenna

Abstract

The invention provides a high-gain electrically-adjustable antenna with a large downward inclination angle. Suitable phase shifters, one-three power dividers, one-two power dividers and the like form a feed network with an optimal amplitude phase, the electric characteristic of each device and the size of each feed cable between the devices are reasonably designed, and the high-gain electrically-adjustable antenna with the large downward inclination angle is further realized. The high-gain electrically-adjustable antenna with the large downward inclination angle is high in phase adjusting precision, the upper sidelobe indexes of a radiation pattern are good, the batch consistency of the indexes are good, cross-boundary coverage of mobile signals is substantially reduced, and the good performance of mobile communication is ensured.

Description

technical field [0001] The invention relates to a device used in the field of mobile communication, in particular to a base station antenna in the field of mobile communication, in particular to a high-gain and large-downtilt electronically adjustable antenna. Background technique [0002] With the continuous development of my country's mobile communication industry, especially the commercialization of 4G, in order to meet the needs of high traffic and high data services in urban areas, the distance between base station sites of major operators is getting smaller and smaller, and the antenna installation location Higher, the beam coverage of ordinary electronically adjustable antennas is relatively large, and it is easy to cause cross-area coverage. Especially for 4G sites, the site is very dense, and the cross-area coverage problem is more serious, which will cause signal interference and affect the quality of mobile communication. [0003] At present, the antennas in the in...

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Problems solved by technology

[0002] With the continuous development of my country's mobile communication industry, especially the commercialization of 4G, in order to meet the needs of high traffic and high data services in urban areas, the distance between base station sites of major operators is getting smaller and smaller, and the antenna installation location Higher, the beam coverage of ordinary electronically adjustable antennas is relatively large, and it is easy to produce over-area coverage, especially the 4G site is very dense, and the over-area coverage problem is more serious, resulting in signal interference and affecting the quality of mobile communication

[0003] At present, the antennas in the industry are mainly ordinary base station antennas and electric adjustable base station antennas. In order to reduce cross-area coverage and achieve large downtilt angles, ordinary base station antennas can only adjust the downtilt angle by mechanical means, while the downtilt angle of conventional electric adjustable base station antennas is generally only 0. In the range of -10°, in order to reduce cross-area coverage and achieve a large downtilt angle, in the process of engineering use, ESC downtilt can only be used on the basis of auxiliary use of mechanical downtilt, but once mechanical downtilt is used, the direction map Distortion is unavoidable, which also affects the coverage quality and effect of the antenna

[0004] In addition, when the downtilt angle of the electronically adjustable antenna is getting larger and larger, the line length of the feed network of the antenna will be lengthened, the signal loss will increase, and the phase control error will increase, resulting in a low gain of the antenna with a large downtilt angle. The coverage of the antenna is reduced

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