ABSTRACT
This chapter deals with the original Space Mapping (SM) in order to get a better understanding of the technique. It focuses on the aggressive space mapping and its applications in antenna design. The chapter introduces the method of using a model from the physical insight to create a mutual impedance formula between two antenna elements. The coarse model in SM could be coarse discretization or some approximation model such as the cavity model in the microstrip antenna. Mutual coupling is very important in the design of antenna arrays, especially phased arrays. The spatial domain is simpler, and its variable separations ensure the completeness of the constituent functions in the formula, even for the complicated dielectric substrate of the patch antennas. For the patch antenna using a substrate with a low dielectric constant, the surface wave may be negligible in comparison with the radiation wave.
