Abstract: The radio astronomy signal can only be observed in space because of the ionospheres’ barrier. Nowadays, it always uses the space deployable electric small antennas for observing. In this paper, we did some analysis for the material of electric small antennas and the corresponding receiving performance, and we constructed the noise influence model based on the material Permeability, electrical conductivity. Through the comparing the computing results based on above model, we conclude that the different influences and deploy difficulties based on different antenna materials, and provide the data reference for new antenna designing. This work can provide the technology supports for the solar radio observation payload located in the next L1 point space monitoring satellite.