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Abstract-In this paper, reflectarrays mounted on or embedded in cylindrical and spherical surfaces are designed, analyzed, and simulated at 11.5 GHz for satellite applications. A unit cell consists of a square dielectric resonator antenna (DRA) mounted on or embedded in metallic conformal ground plane is investigated. The radiation characteristics of the designed reflectarrays are investigated and compared with that of planar reflectarray. A 13×13 planar reflectarray antenna on the x-y plane was designed. By varying the length of the DRA element between 2 mm and 6.2 mm a full range from 0 • to 360 • phase shift can be obtained. The size of each element is equivalent to a compensation phase shift. A maximum directivity of 24.3 dB was achieved while the side lobes were below −12.94 dB in E-plane and −15.79 dB in the H-plane for planar reflectarray. A Full-wave analysis using the finite integration technique (FIT) is applied. The results are validated by comparing with that calculated by transmission line method (TLM).

Characteristics of cylindrical dielectric resonator antenna on (CDRA) on superquadric cylindrical body are discussed in this paper. Curvature effects on radiation characteristics in different planes of (CDRA), the reflection coefficient, the input impedance, The co-polarization and the cross-polarization characteristics, gain of the antenna, are calculated and discussed for different values of ν "squareness parameter". Then show effect of changing the aspect ratio B/A on the reflection coefficient and the input impedance. The proposed antennas are numerically investigated using finite element method and the finite integration technique.

The radiation characteristics of hemispherical DRA elements mounted on or embedded in a hollow circular cylindrical ground structure are investigated. The performance of the DRA array which operates at about 1.8 Ghz, is studied. Factors influencing the array performance, such as the number of elements and element spacing are explained. The perforated dielectric technique is used to design the array from a single dielectric sheet. The overall profile of the antenna can be significantly reduced. The radiation patterns with respect to the number of DRA elements are depicted