Study On The Form Of Hoop Antenna Mesh Reflector For Electrical Performance

Space antenna is used for satellite and other spacecraft signal transmission and reception.Space-borne hoop antennas have attracted extensive attention because of their ideal developable structure.Electrical performance is the most direct manifestation of the performance of an antenna.And carry out the pre-tension form finding design for the dedigned reflector.The electrical and mechanical properties of the antenna can be considered simultaneously.Physical optics method is introduced to calculate the far field direction field of antenna.The far field direction field of the reflector antenna is calculated by programming according to the principle of physical optics.Compared with the calculation results of electric properties in the electromagnetic analysis software,the correctness of the programming calculation is proved.Summarize the evaluation indexes of electrical performance.It lays a foundation for the subsequent form finding design and beamforming optimization design.Through the mathematical expectation method of mathematical statistics analysis node random error influence on antenna performance in different directions for ideal three-way mesh reflector.Analysis the influence of different error distributions along the radius direction on the electrical performance under the same RMS.Based on the traditional paraboloid-oriented root mean square error profile optimization,a method for the design and optimization of the mesh reflecting surface for the maximum gain is proposed.At the same time,beamforming is carried out with the target of energy utilization in the specific covering area.The geometry of the reflector which can meet the requirements of electrical performance is obtained by the beamforming design.By adjusting the position of the feed and the shape of the reflector,the antenna beam shaping effect is further improved.Based on the force density method,the structural mechanics modeling and morphological analysis of the mesh antenna are carried out for the parabolic reflector and maximum gain reflector and beam-shaped reflector with node error.Discuss the structure scheme of non-concave mesh reflector.A method of replacing part of the longitudinal tension cable with a rod is proposed to adapt to the complex topography of the reflection surface.