Analysis Method of Mesh Antenna Electrical Performance in Time Domain Based on Approximate Calculation Formula

Abstract

The invention discloses an electrical property time-domain characteristic analysis method of a mesh antenna on the basis of an approximate calculation formula. The method comprises the following stepsthat: (1) inputting antenna geometric parameters, material parameters and electrical parameters; (2) establishing an antenna structure finite element model; (3) extracting node, unit and shape function information; (4) calculating electrical property one-order and second-order coefficient matrix; (5) applying a dynamic load; (6) calculating node displacement information; (7) calculating node speed information; (8) calculating node accelerated speed information; (9) carrying out approximate calculation on antenna far field electric field change speed time domain information; (10) carrying outapproximate calculation on the far field electric field change speed time domain information; (11) judging whether the electrical property meets requirements or not; (12) outputting an antenna structure design scheme; and (13) updating an antenna parameter. On the premise that calculation is guaranteed, the calculation of reticular antenna far field electric field change speed and the acceleratedspeed time domain time information can be realized, and the electromechanical integrated operation design of an antenna structure is realized.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, and in particular relates to an analysis method for time-domain characteristics of electrical properties of mesh antennas based on approximate calculation formulas. Background technique [0002] Mesh reflector antennas are widely used in space detection, reconnaissance and other fields due to their advantages of high gain, light weight, and low storage ratio. With the increase of the structure size of the mesh antenna, structural nonlinearity and other factors make the mesh antenna more susceptible to the influence of the space environment. Dynamic loads such as space radiation heat and impact will cause deformation of the antenna structure, deterioration of electrical performance, and affect the normal operation of the antenna. Under the influence of dynamic loads, the electrical performance of the antenna changes with time. Therefore, it is necessary to analyze and calculate the change...

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Problems solved by technology

This method takes the array antenna as the object, and analyzes the influence of random vibration on the electrical performance of the array antenna; but in the analysis process, there are problems of large amount of calculation, and it is difficult to quickly obtain the time domain information of the change speed and acceleration of the electrical performance

Zhou Jinzhu, Song Liwei, etc. analyzed the impact of dynamic loads on the structural-functional integration The influence of the mechanical and electrical properties of the antenna; this analysis method also has the problem of being difficult to quickly obtain the time domain information of the change speed and acceleration of the electrical properties

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