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The exploitation of non-periodic antenna arrays for next-generation radio-telescopes is evaluated in the present work. More precisely, the radiation properties and the mutual coupling effects in such structures are studied. A special-purpose Method-of-Moments (MoM) simulation technique allows us to obtain all the Embedded Element Patterns (EEP) and the array impedance matrix, while estimating the...
A new structure for improving the efficiency of antennas in the terahertz band is presented. The structure aims for reducing the energy distribution on a high permittivity material by etching a dielectric horn. The structure allows ultra wideband operation when a broadband antenna is used for excitation. The fundamental mode that propagates in the structure is the HE11 mode, which results of a combination...
A new geometry for the design of antennas in the Terahertz band is presented. The structure is based on a horn antenna etched in the substrate and fed with a planar printed antenna used for generation of terahertz radiation, designed for the 200 GHz to 3 THz range. For the proposed antenna, the energy distribution through the substrate is reduced towards an increase in the gain of the system, at least,...
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