Electric coupling analysis method of temperature loader of large-scale foundation surface antenna

Abstract

The invention relates to an analysis method of a large-scale foundation surface antenna, in particular to an electric coupling analysis method of a temperature loader of a large-scale foundation surface antenna. The method is characterized by comprising the following steps of: 1) determining time, geographical position and gesture of the antenna; 2) calculating the density of heat flow from the sun to the antenna; 3) performing thermal analysis on the antenna by using the density of the heat flow as a load to obtain temperature distribution; 4) adding the temperature distribution serving as atemperature load into a finite element model of the antenna, and performing structural analysis to obtain antenna deformation data; 5) extracting the main surface deformation data of the antenna, andcalculating a far-field pattern of the antenna; and 6) giving a gain loss, a directional error and a minor lobe level. The invention provides the electric coupling analysis method of the temperature loader of the large-scale foundation surface antenna. By the method, influence on the electric performance can be analyzed when the antenna which faces upwards deforms due to the influence of environment, solar radiation and temperature.

Description

technical field [0001] The invention relates to an analysis method for a large ground plane antenna, in particular to a temperature load electromechanical coupling analysis method for a large ground plane antenna. Background technique [0002] There are many large-aperture antennas in the world, most of which are used for astronomical observation. The working frequency band of the radio astronomy telescope may reach 100-300GHz, and the surface accuracy is required to reach the micron level, so reasonable thermal control measures must be adopted. Proactive measures include adding radome protection, or adding an air conditioning system to the back frame to reduce the temperature gradient of the antenna. Passive measures such as spraying the surface with high reflectivity paint to reduce heat absorption. At the same time, the temperature and deformation of the antenna are monitored in real time, and the adjustable side surface is used to ensure the electrical performance indi...

AI Technical Summary

Problems solved by technology

The cost of active measures is relatively high. Due to the air conditioning system, the thermal analysis of such antennas generally starts from the ambient temperature and does not directly consider the influence of solar radiation.

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