چكيده به لاتين
Holographic theory, which is well interested in the optic regime, could be applied in microwave regime with similar topology. The antenna which is designed based on this technique is called “Holographic antenna” (HA). Considering the type of the excitation waves in HAs, they could be divided into two branches as planar and spacing HAs. Most of the researchers have used the holographic technique and developed several configurations of sinusoidally modulated reactance surface for leaky wave antennas. Basically, the hologram surface is considered as an interference surface between the reference and object waves impinging on it. Therefore, the electromagnetic features of the hologram surface could be engineered based on the object and reference waves, and consequently, one can extend the original concepts of the theory and developed antennas with versatile radiation patterns. In this thesis, we aim to employ the holographic method and develop diverse reflectarray antennas possessing unique radiation patterns characteristics. Single- and multi-beam reflectarrays with linear and circular polarizations, double-band reflectarray with orthogonal linear polarization, reflectarrays with shaped linearly polarized radiation patterns (including isoflux, flat top, csc2 and combination of them), and finally reflectarray as the radiator of versatile vortex beams carrying orbital angular momentum, are the list of the designed antennas.
