Optimization of Relevant Parameters of Antennas with Surface and Field Irregularities

The paper presents a numerical procedure to optimize relevant parameters of the antenna, when the random irregularities of the surface and of the incoming field are taken into account. A circular aperture antenna is considered. The randomness of the surface and field irregularities are described by means of the degree of coherence of the statistical process involved. The antenna parameters which are more meaningful for this kind of study are discussed. They are the antenna aperture efficiency ¿, the ratio ¿/¿n between efficiency for the wanted field and for noise, and the latter relative to the cost of the antenna. Examples of optimization of these parameters are reported. They give the optimum illumination functions and the optimum dimensions of the antenna.