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This paper proposes a novel method to suppress the side-lobe level of pyramidal horn antennas using graphene sheets. Using numerical full wave simulation, it is shown that loading graphene sheet inside the horn antenna leads to a tapered aperture field distribution, resulting in side-lobe level reduction. Graphene length and surface impedance are optimized with the purpose of achieving a low side-lobe...
In this paper, the impact of finite coated ground plane edge diffractions on the amplitude patterns in the E and H planes of circular aperture antennas is investigated. A model based upon the uniform geometrical theory of diffraction for an impedance wedge and the geometrical optics method is presented to calculate the amplitude patterns of a circular aperture antenna mounted on square and circular...
In this paper the radiation pattern of the finite phased array of plane waveguides with an impedance flange has been theoretically investigated. The array radiation has been considered as superposition of radiation of each waveguide. Mutual coupling between waveguide apertures has been taken into account using variational principle in the single-mode approximation. Some numerical results for the array...
The results of analysis and investigation of some semiconductor antennas with reconfigurable aperture have been presented in this paper. Discussed solutions have been based on the utilized semiconductor material. It allows to design the electronically reconfigurable antennas. The key element of the reconfigurable antenna is a surface PIN (SPIN) diode whose conductivity changes proportionally to the...
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