Large-scanning-angle array antenna and design method thereof

An array antenna, scanning angle technology, applied in the direction of antennas, antenna arrays, and devices for manufacturing antenna arrays, etc., can solve the problem of high grating lobes
CN110492252AActive Publication Date: 2019-11-22NORTHWEST INST OF NUCLEAR TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWEST INST OF NUCLEAR TECH
Publication Date
2019-11-22

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Abstract

A large-scanning-angle array antenna and a design method thereof are provided. Scanning of an azimuth and a pitching + / - 45-degree scanning angle can be realized under a TR assembly interval close toone wavelength, and the maximum grating lobe of a visual space is -20dB lower than a main lobe. The antenna comprises a frame and an antenna subarray. N*M areas are arranged in the frame, and each area is provided with an antenna subarray; each antenna subarray comprises a TR assembly sub-array, a sub-array feed adapter plate and a sub-array antenna plate. The input end of the sub-array feed adapter plate is connected with the TR assembly sub-array, the output end of the sub-array feed adapter plate is connected with the input end of the sub-array antenna plate, and the sub-array antenna platetakes the antenna unit group as the output. Through the subarray feed adapter plate, the distance between subarray antenna units is reduced, the reduced subarray antenna offsets in the subarray sizeof the original TR assembly, and through the structure, grating lobes are inhibited, and the engineering level is improved.
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Description

technical field

[0001] The invention relates to an antenna structure, in particular to a large scanning angle array antenna and a design method thereof. Background technique

[0002] Phased array antennas are widely used in the fields of radar guidance and wireless communication because of their advantages such as fast beam scanning, flexible beam forming, and high reliability. There are various structural forms of array antennas. The most basic form is a linear array, which refers to an array antenna in which the centers of multiple radiating elements are on a straight line. The element spacing can be equal or unequal. When the centers of the antenna's radiating elements are arranged on a plane, it is called a plane array. The contour shape formed around the area array can be a rectangular area array or a circular area array. In the array antenna, the element spacing is generally 1 / 2 wavelength. If the element spacing is too large, unnecessary grating lobes will be formed...

Claims

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