Bipolarized loaded antenna radiating unit

Abstract

A bipolar load antenna radiation unit includes an antenna bottom plate, two dipoles which are vertically crossed with each other, wherein the dipoles are in a plate shape and arranged vertically to the antenna bottom plate, each contains two half-dipoles including a radiation part, a support part, a feed structure and a basic part, the basic part is connected to the antenna bottom plate. The bipolar load antenna radiation unit also includes a tuning plate. The feed structure includes two vertical crossed and not connected feed plates. The two half-dipoles of each bipolar are placed at different sides corresponding to the feed plates. The cross positions of the two feed plated is corresponding to the center of the radiation unit. The invention reduces the height of the radiation unit greatly while the performance is satisfied, also increases the isolation performance of the radiation unit, so that a high order intermodulation is controllable, the feed line of a feeder becomes free, and finally the impedance matching is satisfied and the structure is simple.

Description

technical field [0001] The invention relates to a dual-polarized plate antenna for mobile communication, in particular to a radiation unit of the dual-polarized plate antenna. Background technique [0002] Antennas used in wireless telecommunications systems have the ability to transmit and receive electromagnetic signals, which are processed by receivers and fed to a communications network. The transmitted signal is transmitted at a different frequency than the received signal. Among different types of mobile communication antennas, dual-polarized antennas have become a very important research topic and demand is increasing due to their functions of frequency reuse and polarization diversity. However, the commonly used dual-polarized antennas usually have the following deficiencies due to the structure of the radiation unit: [0003] First of all, due to the large number of applications of dual-polarized antennas, reducing the size of each antenna to reduce manufacturing ...

AI Technical Summary

Problems solved by technology

[0003] First of all, due to the large number of applications of dual-polarized antennas, reducing the size of each antenna to reduce manufacturing costs has become one of the goals of manufacturers; at the same time, in mobile communications In base stations, reducing the size of the towers by using smaller base station antennas, thereby reducing the visual impact of these towers in the community has also become one of the concerns of the industry. In this way, antennas with a low profile are becoming more and more important A trend, but the currently commonly used dual-polarized antenna does not meet this requirement due to its radiating unit structure and other reasons. For example, in the 800MHz-900MHz frequency band, the radiating part of the traditional dual-polarized antenna’s radiating unit should be approximately 1 / 4 of the distance from the base plate The height of one wavelength, so the whole antenna radiating unit is often much higher than a quarter of the wavelength, which increases the cost of the radiating unit and the outer cover, and is not conducive to the visual effect, but by simply changing the shape of the radiating unit It is quite difficult to reduce the height of the antenna, and when the height of the antenna is reduced, its isolation will immediately become worse;

[0004]Secondly, the traditional dual-polarized antenna radiating unit is basically a radiating unit and a patch unit integrated by folding a single piece of metal, but the use of these two radiating units The isolation index of the antenna is not high, especially the radiating unit of the folded dual-polarization antenna adopts the structure that two dipoles are located on the same side of the feed sheet. resulting in poor isolation;

[0005]Furthermore, the folded radiating unit of the traditional dual-polarized antenna is mostly folded and integrated with a single piece of metal, and the welding range between it and the antenna base plate is relatively large and requires a relatively long Many fasteners are fixedly connected, and the complexity of the process limits mass production; at the same time, these fasteners and solder joints introduce many hidden dangers that the contacts are not fixed firmly and the interface between different metals is loose, resulting in undesirable intermodulation product

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