Three-dimensional array of fixed multi-beam helical antenna

Abstract

The invention provides a three-dimensional array of fixed multi-beam helical antenna. The three-dimensional array of fixed multi-beam helical antenna comprises helical antenna units and a frustum structure. The frustum structure comprises a top face and a plurality of lateral faces. The upper ends of the lateral faces are connected with the edge of the top face, the lateral sides of adjacent lateral faces are connected with each other, and the top face and the lateral faces are each provided with a helical antenna unit. The top face of the frustum structure is an equilateral polygon, and the lateral faces of the frustum structure are isosceles trapeziums. Each helical antenna unit is separated through a beam separating sheet, and the helical antennas in the helical antenna units are installed on a medium sheet. The helical antennas have the function of folding and unfolding, and are capable of realizing effective control over the screw pitches and the stiffness both of the helical antennas through a flexible support wire and a screw pitch fine adjustment device. By using the three-dimensional frustum structure to realize directional deflection of antenna beam, so that beams of airspace from a wide angle are covered without the need to use phase shift feed network. In addition, the beam separating sheet reduces cross coupling among the antenna units, and reduces the size of the frustum structure. The three-dimensional antenna array is all good in electricity property, cost and weight.

Description

technical field [0001] The invention relates to a helical antenna array, in particular to a fixed multi-beam helical antenna three-dimensional array with functions of gathering and unfolding. Background technique [0002] The helical antenna is a widely used antenna in the field of aerospace. Compared with the microstrip antenna commonly used in the array antenna, the multi-turn axial mode single-wire helical antenna has the advantages of pattern bandwidth, circular polarization, pattern symmetry and Directionality is clearly dominant. Therefore, using a single-wire helical antenna as an array element can greatly reduce the number of array elements in a small antenna array while maintaining the gain of the array antenna. In order to increase the gain, the single-wire helical antenna usually has more turns, so the height is higher. The use of the compression-release device can greatly reduce the height of the antenna in the non-working state, especially suitable for large-sc...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a fixed multi-beam helical antenna three-dimensional array with the functions of gathering and unfolding, so as to solve the problem that the gain of the existing planar helical antenna array decreases rapidly when scanning to a large angle, and the increase in the number of array elements causes Array Beam Narrowing Problems

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