Design of a spherical array by orthogonal projection of a planar microstrip antenna array

In this work we will present a design and analysis of a spherical conformal microstrip antenna array, which is obtained by the orthogonal projection of a predesigned 2×2 planar microstrip antenna array operating at X-band frequency, where the antenna elements are fed, via their non-radiating edge, by a microstrip corporate feed network. The designed spherical conformal microstrip array can become integrated to a spherical structure where it is mounted on. A comparison between the predesigned planar array and the orthogonally projected spherical array is presented and simulation results are discussed. The substrate material used in the design is Rogers RT/Duroid5880 with 2.2 relative permittivity.