Cylindrical lens array (CLA) and plasmonic nano-grating structures were integrated with a large area interdigitated photoconductive antenna (PCA) for high-efficiency terahertz (THz) emitter applications. The peak-to-peak amplitude of THz radiation pulse from the CLA-integrated PCA was enhanced 5.5 times compared that conventional without CLA. highly localized electric field near nanoscale grati...

In this study, a hybrid iteration force density method (HIFDM) was proposed to ensure both tension uniformity and accuracy of an antenna mesh reflector. Based on genetic algorithm (GA), the boundary cable reflector net optimized, which further improved precision The static model large deployable structure established using finite element (FEM), thus, iterative strategy for form-finding proposed...

Antenna measurement data is collected over a surface as a function of position relative to the antenna. The data collection coordinate system directly affects how data is mapped to the surface: planar, cylindrical, spherical or other types. Far-field measurements are usually mapped or converted to spherical surfaces from which directivity, polarization and patterns are calculated and projected....

Abstract. In this paper, an innovative cylindrical deployable mechanism (DM) based on rigid origami is presented, which used to design a parabolic antenna. The can be deployed from the cuboid folded configuration unfolded with only one actuator. First, string proposed different types of four-vertices unit cells and kirigami techniques. By considering units as 6R single-loop mechanisms, kinemati...

The solution to the canonical problem of a radiating infinitesimal electric dipole antenna that is centred in a multilayered, concentric metamaterial-based spherical shell system is presented. It is demonstrated that when this system is electrically small, a specifically designed homogenous and isotropic epsilon-negative (ENG) layer can function as a distributed matching element to the antenna ...