Planar double-helix array of double-frequency dual-polarization base-station antenna

Abstract

The invention discloses a planar double-helix array of a double-frequency dual-polarization base-station antenna, which relates to double-frequency dual-polarization base-station antennas for mobile communication. The planar double-helix array is structurally characterized in that high-frequency fundamental oscillators (10) and low-frequency fundamental oscillators (20) are arranged on the front side of a reflector (30), a feed network (40) is arranged on the back side of the reflector (30), the high-frequency fundamental oscillators (10) alternately and bilaterally move pairwise to form a high-frequency radiation array, and the low-frequency fundamental oscillators (20) alternately, bilaterally and correspondingly move in the direction opposite to the moving direction of the high-frequency fundamental oscillators (10) to form a low-frequency radiation array. The horizontal beam width can be adjusted by adjusting laterally moving quantity of the fundamental oscillators in the horizontal direction, cross polarization discrimination ratio can be adjusted by adjusting the width of the reflector and the height of a side arm, wind resistance can be reduced by decreasing the width of the reflector, and space utilization rate of the antenna is increased. The planar double-helix array is applicable to the field of arrangement of high-frequency and low-frequency oscillators of the double-frequency dual-polarization base-station antenna.

Description

technical field [0001] The invention relates to a mobile communication dual-frequency dual-polarization base station antenna, in particular to a planar double-helix array of a dual-frequency dual-polarization base station antenna. Background technique [0002] At present, there are two types of array arrangements used by dual-frequency dual-polarized base station antennas: a dual-column linear array and a single-column linear array. Both array arrangements have their disadvantages: [0003] The dicolumn linear array is asymmetrical in the width dimension of the reflector, which causes the main lobe of the main polarization pattern on the horizontal plane to point away from the center position, and the symmetry of the cross-polarization pattern on the horizontal plane becomes poor, and the cross-polarization discrimination within ±60° The ratio becomes worse, and the reflector is required to be very wide; [0004] The distance between the high-frequency basic oscillator and...

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Problems solved by technology

[0003] The dicolumn linear array is asymmetrical in the width dimension of the reflector, which causes the main lobe of the main polarization pattern on the horizontal plane to point away from the center position, and the symmetry of the cross-polarization pattern on the horizontal plane becomes poor, and the cross-polarization discrimination within ±60° The ratio becomes worse, and the reflector is required to be very wide;

[0004] The distance between the high-frequency basic oscillator and the low-frequency basic oscillator in a linear array is too small, and the mutual influence is great, especially the masking of the low-frequency basic oscillator on the high-frequency basic oscillator leads to unexpected deterioration of the high-frequency pattern

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