Holographic Surface Leaky-Wave Lenses With Circularly-Polarized Focused Near-Fields-Part I: Concept, Design and Analysis Theory

Luis Gomez-Tornero, Jose; Blanco, Darwin; Rajo-Iglesias, Eva; Llombart, Nuria

Abstract

A novel concept of planar printed-circuit microwave lens, based on the transformation of a cylindrical surface wave into a modulated leaky wave, is presented in this paper. Inspired on holographic concepts, the TM0 cylindrical leaky wave is properly tapered across the two-dimensional surface by using an Archimedean-spiral shaped slotted printed-circuit, so that it is obtained a quadratic-phase, quasi-uniform amplitude aperture distribution which creates a highly focused circularly-polarized near-field pattern. The first part of this paper describes the general analysis and synthesis methodology to obtain planar holographic lenses with high radiation and focusing efficiency. As an example, a printed-slot lens with 6 lambda(0) diameter and focal ratio F/D = 1 operating at 10 GHz is designed and theoretically studied by simulations. The second part of the paper concentrates on the prototype and measurements.

Más información

Título según WOS: ID WOS:000321670900009 Not found in local WOS DB
Título de la Revista: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volumen: 61
Número: 7
Editorial: IEEE COMMUNICATIONS SOCIETY
Fecha de publicación: 2013
Página de inicio: 3475
Página final: 3485
DOI:

10.1109/TAP.2013.2257644

Notas: ISI