Broadband dual-polarized antenna

Abstract

The invention discloses a broadband dual-polarized antenna. 2 or 4 spurious radiation slots are disposed around each dual-polarized oscillator body on a reflecting plate, the front-to-rear ratio of an antenna array may be improved by 2dB to 6dB, and an isolation index is improved to some extent. In addition, by the use of isolation components, not only the convergence of an S parameter of a radiation unit and the impedance and isolation index of the antenna array are significantly improved, but also cross polarization ratio indicators of a horizontal plane of a directional diagram of the antenna array are substantially improved. The broadband dual-polarized antenna meets the demand for high performance in terms of wide frequency bands of current base station antennas, and has good application prospects in the field of communication.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a broadband dual-polarization antenna. Background technique [0002] With the rapid development of mobile communication technology, the demand for broadband and high radiation performance base station antennas is gradually emerging. Broadband means that it has excellent impedance and isolation indicators in multiple mobile communication operating frequency ranges, and high radiation performance means that it has excellent radiation indicators. , especially the horizontal plane radiation index, in order to achieve a good coverage effect. [0003] The performance of a base station antenna depends primarily on the performance of the elements in the antenna array. At this stage, the VSWR and isolation indicators are mainly improved by optimizing the form and size of the radiation oscillator itself, but the degree of improvement in this way is limited, and it is difficult to me...

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Problems solved by technology

At this stage, the VSWR and isolation indicators are mainly improved by optimizing the form and size of the radiation oscillator itself, but the degree of improvement in this way is limited, and it is difficult to meet the wide-band multi-standard applications.

The cross-polarization ratio and the front-to-back ratio are two important indicators in the horizontal plane radiation characteristics. For ultra-wideband antennas, the high-frequency cross-polarization ratio and the low-frequency front-to-back ratio are two key factors that restrict the horizontal plane radiation performance. At this stage Mainly by optimizing the size of the radiation oscillator itself and simply changing the cross-sectional size of the reflector to improve the above indicators, but due to the limited degree of improvement, it is easy to cause cross-region interference in the low-frequency band and poor diversity reception in the high-frequency band. In addition, due to the usual It is said that the high-frequency cross-polarization ratio index becomes worse when it is downtilted, which also reduces the downtilt angle range of the antenna, thus limiting the use of base station antennas

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