META Conference, META'10

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Design of tapered 1D leaky- waveguides using FSS and HIS for synthesis of radiation diagrams and focusing patterns
JOSE LUIS GOMEZ-TORNERO, MARIA GARCIA-VIGUERAS, RAUL GUZMAN-QUIROS, GEORGE GOUSETTIS, ALEXANDROS FERESIDIS

Last modified: 2009-10-26

Abstract


A 1D leaky-wave (LW) structure, formed by a parallel-plate waveguide (PPW) loaded with a frequency-selective surface (FSS) and a high-impedance surface (HIS), is presented for the first time, in order to show its ability to synthesize fashioned radiation and focusing patterns.

 

Leaky-wave (LW) structures support a radiating leaky-mode, whose complex propagation constant must be somehow controlled to design leaky-wave antennas (LWA) or leaky-wave lenses (LWL). In this contribution an original hybrid technology (parallel-plate waveguide combined with printed circuits) is presented, showing how the FSS and HIS printed-circuit tapered geometries allow to flexibly control the propagation and radiation properties of the main constituent leaky-mode. The basic working mechanism and theory for the analysis of these leaky-wave structures will be explained in detail. In this way, it will be shown how to design low-sidelobes high-directive beam-steering LWAs  and high efficiency focusing lenses, which might find many practical applications in telecommunication and imaging/health systems.