Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Zhou Du Name of the doctoral dissertation Development of Characterization Methods for Antennas and Quasi-Optics Publisher School of Electrical Engineering Unit Department of Radio Science and Engineering Series Aalto University publication series DOCTORAL DISSERTATIONS 8/2015 Field of research Radio Engineering Manuscript subm...

We propose a multilayer unit cell consisting of Minkowski fractal-shaped reflector with aperture coupled phasing stubs to obtain broad phase range for reflectarray antenna smaller size and interelement spacing compared some other studies in the literature. In study, simulations are conducted using high-frequency structure simulator (HFSS) program Floquet Port incidence. A two cycles very low re...

This document presents the design and manufacture of a reflectarray (RA) antenna for Ku-band that is based on fully-metallic 3D architecture. The unit cell formed by square-shaped waveguide section ending in short circuit, which back ground plane. Each has ability configuring phase its own reflected field means resonators perforated walls section. resonator-based introduces character to design....

In this paper the effects of subwavelength antenna resonator element dimensions on the anomalous reflection properties of metasurfaces operating in the millimeter wave and terahertz frequency regions are investigated. Such twodimensional structures are finding uses as flat optics in a variety of applications including beam steerers, reflectarrays, and broadband, polarization-independent radar a...

This paper presents design and experimental validation of radiation performance of torroidal shaped mm wave reflector antenna to be used in NASA’s SIRICE mission. A near field amplitude-only measurement set up is described for experimental validation of radiation performance of mm wave torroidal shaped reflector antenna. A global optimization procedure, Particle Swarm Optimization (PSO) is desc...