Method for compensating electrical property of deformable array antenna based on electromechanical coupling and least square method
A least square method and array antenna technology, applied to antennas, antenna arrays, circuits, etc., can solve problems such as structural deformation and antenna electrical performance deterioration
Inactive Publication Date: 2015-06-10
XIDIAN UNIV
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Problems solved by technology
[0007] Based on the above problems, the present invention is based on the electromechanical coupling model of the array antenna, combined with the least square method, realizes the electrical performance compensation for the deformed array antenna, and can be used to solve the problem of the deterioration of the electrical performance of the antenna caused by the structural deformation caused by the load, so as to ensure the service life of the antenna. The antenna can work normally in the environment
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[0069] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0070] refer to figure 1 , the present invention is based on the electromechanical coupling and the least squares method of the deformation array antenna electrical performance compensation method, the specific steps are as follows:
[0071] Step 1, determine the geometric model parameters, material properties and electromagnetic working parameters of the array antenna
[0072] 1.1. Determine the geometric model of the array antenna structure based on the array antenna's array shape, aperture size, type, number and arrangement of radiation elements in the array, and the antenna frame.
[0073] 1.2. Determine the material properties of the cold plate, T / R components, ribs, and radiation elements in the array antenna system, including density ρ, elastic modulus E, and Poisson’s ratio μ.
[0074] 1.3. Determine the electromagnetic working parameters of t...
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The invention discloses a method for compensating the electrical property of a deformable array antenna based on electromechanical coupling and a least square method. The method comprises the following steps: 1) determining the structure parameters and electromagnetic operating parameters of an array antenna; 2) obtaining the structural deformation of an antenna array surface through finite element analysis; 3) calculating the electrical property of the array antenna in an ideal condition and a deformation condition; 4) combining the least square method to obtain compensation excitation current through calculation; 5) judging whether the electrical property of compensated array antenna meets index requirements. According to the method provided by the invention, the compensation of the excitation current can be solved by comparing a far-zone field of an ideal array antenna with a far-zone field of the deformable array antenna by combining the least square method based on an electromechanical coupling model of the array antenna, and then the compensation for the electrical property of the deformable array antenna can be realized by adjusting current; furthermore, the deterioration of the electrical property of the antenna caused by an environmental load can be improved obviously, and the array antenna can be ensured to operate in a good condition in various service conditions.
Description
technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a method for compensating the electric properties of deformed array antennas based on electromechanical coupling and least squares method. Background technique [0002] Antennas are widely used in radio systems such as communications, broadcasting, television, radar, and navigation. They play the role of spreading radio waves and are an essential device for effectively radiating and receiving radio waves. Array antennas can form radiation characteristics different from general unit antennas, especially can form radiation that is much stronger than unit antennas pointing to a certain part of space, and because of their high reliability, multiple functions, high detection and tracking capabilities, and stealth performance Such advantages have been widely used in various radar systems, navigation, electronic countermeasures and other fields. [0003] The antenna array ...
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IPC IPC(8): H01Q21/00H01Q3/26
Inventor 王从思王艳余涛段宝岩李鹏周金柱李娜宋立伟薛敏肖岚
Owner XIDIAN UNIV