Dual-frequency dual-polarized antenna

Abstract

A dual-band and dual-polarized antenna (10) comprises a metal reflector (1), a first radiator array and a second radiator array coaxially aligned along an axis of the reflector. The first radiator array has a plurality of first dual-polarized radiators (3) for a lower frequency range aligned in front of the reflector. The second radiator array has a plurality of second dual-polarized radiators (2) for a higher frequency range aligned in front of the reflector. Each first radiator has a second radiator encased therein, and two adjacent first radiators have two second dual-polarized radiators inserted therebetween. The antenna of the present invention optimizes the performance of the first radiators for the lower frequency range and the second radiators for the higher frequency. Moreover, the antenna is satisfactorily meeting the antenna requirements of wide frequency range, small size, high gain, wide broadband, simple design, low cost and consistence etc.

Description

technical field [0001] The invention relates to the communication field, in particular to a dual-frequency dual-polarization antenna. Background technique [0002] In modern communication systems, the application of dual-frequency dual-polarized antennas can meet the requirements of continuous upgrading of communication systems, effectively solve the problem of multipath fading, reduce the number of antennas, and reduce antenna costs. In recent years, as the requirements for dual-frequency dual-polarization antennas have gradually increased, especially in terms of gain, bandwidth characteristics, half-power angle fluctuation characteristics with frequency, and cross-polarization characteristics, the implementation form of dual-frequency dual-polarization antennas Keep innovating. [0003] The existing technology provides a broadband dual-band dual-polarization antenna with good overall performance, wide frequency bandwidth, small windward area, and light weight. The high-f...

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Problems solved by technology

[0004] Since the wavelength ratio of the low-frequency and high-frequency wavelengths of the broadband dual-frequency dual-polarized antenna in the prior art can reach more than 3 at most, and the distance between two adjacent low-frequency vibrators is twice the distance between two adjacent high-frequency vibrators, in order to To ensure low-frequency electrical performance, generally 0.75-0.95 times the wavelength corresponding to the center frequency of the low-frequency vibrator is used as the array spacing of the antenna. When the high-frequency vibrator works at the highest frequency point, the distance between two adjacent high-frequency vibrators exceeds its operating frequency Corresponding to 1.16 times the wavelength, this has a serious impact on the high-frequency electrical performance and will lead to a decrease in its electrical performance indicators

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