Show simple item record Sze, Kin Yip en_US 2007-05-22T15:13:12Z 2007-05-22T15:13:12Z 2001-05-01T00:00:00Z en_US
dc.description.abstract The analysis of scattering from an infinite periodic array of microstrip patches is used to study line-source-fed single-layer microstrip reflectarrays. An application of these reflectarrays is in high-gain conformal antennas. Employing rectangular patch geometries in the modelling, reflection phase properties of the reflectarrays are rigorously investigated. Effect of important parameters, such as, patch dimension, substrate permittivity and thickness, are examined. Included in the study is the effect of unattainable reflection phase on phase correction errors and far-field radiation characteristics. A formulation based on phased array and aperture theories is derived for the far-field analysis. For the analysis of an infinite periodic array of single-layer rectangular microstrip patches, an empirical expression is formulated for approximating the TE-to-z reflection coefficient phase with the incident angle. Also, for computing individual reflectarray far-field terms, simple symmetry formulations are presented. In addition, multiple patch geometries for the reflectarray are examined. A new hat-shaped patch geometry is introduced in combination with rectangular patch array, for enhanced performance. Far-field radiation characteristics, using tapered distribution schemes for line-source excitations, are compared with those of the uniform distribution. Subsequently, an offset-fed reflectarray is also proposed. en_US
dc.format.extent 8148944 bytes
dc.format.extent 184 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.language en en_US
dc.language.iso en_US
dc.rights info:eu-repo/semantics/openAccess
dc.title Analysis of line-source-fed single-layer microstrip reflectarrays en_US
dc.type info:eu-repo/semantics/doctoralThesis Electrical and Computer Engineering en_US Doctor of Philosophy (Ph.D.) en_US

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