Electromechanical coupling-based cylindrical conformal array antenna critical load rapid determination method

Abstract

An electromechanical coupling-based cylindrical conformal array antenna critical load rapid determination method disclosed by the present invention comprises the steps of determining a structural parameter and an electromagnetic parameter of an antenna; carrying out the structural load deformation analysis on the antenna; calculating the new positions of the array elements after deformation; establishing an array element rectangular coordinate system and an array element spherical coordinate system; determining a conversion matrix between the array element rectangular coordinate system and thearray element spherical coordinate system; solving an array element directional diagram under the array element rectangular coordinate system; determining a conversion matrix of the array element rectangular coordinate system and an array rectangular coordinate system; solving an array element directional diagram under the array rectangular coordinate system; determining the excitation amplitudesand the phases of the array elements; calculating the space phase difference of each array element at a target; according to an electromechanical coupling model, calculating an electrical performanceparameter of the antenna after deformation; according to the design requirements of the antenna, determining whether the electrical performance parameter under the load action satisfies the requirements. The electromechanical coupling-based cylindrical conformal array antenna critical load rapid determination method can evaluate a critical load value of a cylindrical conformal array antenna quantitatively, thereby guiding the structural design of the cylindrical conformal array antenna.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, and specifically relates to a method for quickly determining the critical load of a cylindrical conformal array antenna based on electromechanical coupling, which can be used to quantitatively evaluate the critical load value of a cylindrical conformal array antenna, thereby guiding the cylindrical conformal array antenna structural design. 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 tech...

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Problems solved by technology

[0004] At present, a lot of research has been done on the influence of the load environment on the electrical performance of the antenna at home and abroad. Knott P et al. proposed a mathematical model of the conformal linear array, and tested and analyzed the influence of the environmental load on the electrical performance of the conformal linear array antenna. This method can calculate the impact of the load environment on the electrical performance of the conformal antenna, but it does not give the applicable load range of the conformal antenna model based on the electrical performance, and the analysis method has limited objectives and complicated processes, making it difficult to implement

Zhou Jinzhu and others studied the influence of load on the electrical performance of the antenna. The structural deformation of the antenna under the load will affect the main beam direction, gain and side lobes of the antenna, but the load range in which the antenna can work normally has not been determined. The critical load of the antenna

For the research on critical load, at present, most of the critical loads of the antenna are determined with the goal of structural mechanical properties, and the critical load when the antenna structure begins to become unstable is given, and the electrical performance of the antenna is not considered.

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