Analysis for Electrical Performance of Antenna Considering Gravity Deformation Based on Different Band and Elevation Angle

Abstract

Abstract.In order to ensure higher accuracy and better electrical performance of large antennas in future,this paper does some research for deformation of antenna’s reflector:modeling for 25m antenna and reappearing deformation when elevation changes every 15° just considering gravity by using ANSYS.Using results of simulation obtains deformation error curves with elevation changes, creates the conditions for compensating distortion and has a certain value. By using Ruze formula, deeply studies the regular about antenna’s electrical performance influenced by deformation because of elevation changes,obtains meaningful data and tables of relationship between elevation and parameters of electrical performance in nine bands of 25m antenna.It finds out that when working in high-frequency band, efficiency and gain loss of antenna will be more affected by elevation angle changes.Finally creates conditions for optimizing antenna parameters and performing high reliability tasks such as deep space exploration and aerospace communication.

Rapid Deformation Calculation for Large Reflector Antennas: A Surrogate Model Method

“…In dynamic loads, gravity is the dominant factor causing the deformation of the main reflector. The gravity-induced deformation distribution varies with elevation angle and can be simulated by the antenna FE model (Wang et al 2014;Hu et al 2017;Bergstrand et al 2019;Lian et al 2021). The temperature distribution of the antenna is always time-varying, which will cause irregular deformation.…”