Design of a Near Field Protective Dielectric Radome “Window” for a Curved Phased Array Antenna-Circumferential Polarization Case

A systematic design method of near field dielectric windows for two-dimensional conformal fed arrays has been previously developed. The developed design yielded simultaneously well-behaved element patterns in each polarization. This method utilized dimensioning of the window thickness to maximize the radial decay rate of the radome induced surface waves and inclusion of a sufficiently large gap to decouple the surface waves from the array face. In the present paper, these ideas are extended further to arrays scanning in both planes for which the coupling between the two cross polarizations due to the dielectric layer is taken into consideration