Abstract: In order to satisfy the need of high precision and lighting of the antennal reflector, the theory of the machinery fiber spreading method was analyzed. The ultra-thin high modulus fabric was waved by multi-spreading tow, for which the width of spreading fiber was 4 mm, and the fabric area density was 106 g/m². Then, the carbon fibers tensile tests were conducted. The results show that the tensile strength of spreading fiber was decreased by 1.26% and the modulus was decreased by 1.29%. The single layer fabric sample was manufactured, and the morphology of the ultra-thin fabric was superior to the traditional fabric. In this paper, the ultra-thin high modulus fabric composite was simulated through finite element combining with the structure of antennal reflector. The simulation results show that the base frequency of the reflector was 138.53 Hz, and the weight of skin was less 16.1% compared to the traditional fabric. In addition, the reflector structure which is consistent with the ultra-thin high modulus skin and the honeycomb was tested under the sinusoidal vibration condition. The test results show that the reflector could satisfy the designing requirement.

Key words: ultra-thin high modulus fabric, reflector, finite element, sine vibration