Abstract: In the manufacturing process of land-based inflatable deployable antenna, the main factors affecting the accuracy of reflector include: The spacing of spacer fabric reinforcement composite, air pressure, number of stickers, adhesive material and air pressure action time. In order to explore the influence of these factors on the reflecting surface, different kinds of cube samples with length and width of 40 cm were made by the spacer fabric reinforcement composite. Through experiments under different conditions of air pressure, the changes of deformation in the direction of length, width and thickness of the cube samples were observed. Combined with the mechanical property test of this material, the effect of this material in practical application was analyzed. The results show that the deformation of the samples in different directions is different, which is closely related to the structure of the composites. The composites with different spacing will have different effects on the deformation of the sample. For the samples with the same spacing, the more stickers, the easier the deformation of the sample. To ensure the accuracy of the reflecting surface, it can be control the appropriate number of stickers and select the sticker material with better dimensional stability. For the same sample, with the increase of air pressure, the deformation rate decreases and the total deformation increases. The accuracy of the reflector can be guaranteed by controlling the appropriate air pressure range and selecting the structure with small deformation. When the sample works under 5 psi air pressure for 24 hours, the sample will creep, the creep rate will decrease continuously, and the air pressure will change accordingly. Therefore, to ensure the accuracy of the reflecting surface, the working time of the antenna needs to be considered.

Key words: the accuracy of the reflecting surface, warp knitted spacer fabric, the adhesive material, composites