<p>In this paper, the antenna multi-physics field optimization is studied. At present, the research mainly focused on single performance optimization, and the multi-physics field performance cannot be considered comprehensively. In this paper, the relationship between antenna configuration and multi-physics field performance is investigated by normalizing antenna configuration, and an optimization model is established. The log-periodic dipole antenna (LPDA) is taken as the research object, and its electrical performance is predicted by simulation fitting according to the normalized parameters, and the relationship is established to provide reference for its design. The effectiveness of the multi-physics field optimization model is verified by a design example of a space deployable LPDA. The results show that the design period is obviously shorter and the best performance is easy to be obtained under the multi-physics field condition.</p>