A Fast Method for Determination of Structural Tolerance of Cylindrical Conformal Array Antenna Based on Electromechanical Coupling

Abstract

The invention discloses a method for quickly determining cylindrical conformal array antenna structure tolerance based on electro-mechanical coupling. The method comprises the following steps: determining structure parameters and electromagnetic working parameters of a cylindrical conformal array antenna; respectively giving circumferential position tolerance and axial position tolerance of an initial array element, and determining a circumferential position error random quantity and an axial position error random quantity of all array elements in an array plane; calculating new positions of the array element when an error exists; establishing an array element rectangular coordinate system and an array element spherical coordinate system, and calculating array element directional diagrams under the array element rectangular coordinate system and an array rectangular coordinate system; determining an array element excitation amplitude and a phase according to apertural face weighting distribution; calculating a spatial phase difference of each array element at a target; calculating antenna electrical performance parameters by utilizing a cylindrical conformal array antenna electro-mechanical coupling model when the error exists; judging whether the antenna electrical performance under the structure tolerance condition meets a requirement. According to the method, the problems about quickly determining a cylindrical conformal array antenna structure scheme and distributing the antenna structure tolerance are effectively solved; the method can be used for guiding the evaluation of an antenna structure scheme.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, and in particular relates to a method for quickly determining structural tolerances of cylindrical conformal array antennas based on electromechanical coupling, which can be used to guide the rapid determination of structural tolerances of cylindrical conformal array antennas and the evaluation of structural schemes. Background technique [0002] The conformal array antenna is an antenna that is consistent with the shape of the object. It has the advantages of saving the structural space of the carrier, not affecting the aerodynamic performance of the carrier, and reducing the scattering cross-sectional area of ​​the radar. It has been widely used in the aerospace field. Among them, the cylindrical conformal array antenna is the most common form of conformal antenna, which has been widely used in various radar systems. [0003] With the development of military technology in the world, the ...

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Problems solved by technology

[0007] Based on the above problems, the present invention provides a method for quickly determining the structural tolerance of cylindrical conformal array antennas based on electromechanical coupling, so as to effectively solve the problem that it is difficult to quickly determine and allocate antenna structural tolerances in the design of cylindrical conformal array antenna structures. To guide the formulation and distribution of the axial position error and circumferential position error of the cylindrical conformal array antenna elements, and the evaluation of the structural scheme of the cylindrical conformal array antenna

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