An Offset Gregorian Dual-Reflectarray Antenna with Eight Scanned Beams

Autor:	Mohammad Mohammadirad, Nader Komjani
Rok vydání:	2014
Předmět:	Physics Radiation Offset (computer science) business.industry Parabolic reflector Beam scanning Electronic Optical and Magnetic Materials Optics Cardinal point Electrical and Electronic Engineering Wideband business Phase control Broadside
Zdroj:	Electromagnetics. 34:111-127
ISSN:	1532-527X 0272-6343
DOI:	10.1080/02726343.2014.863685
Popis:	This article describes the analysis and design of a new beam-scanning dual-reflectarray antenna in an offset Gregorian configuration. The phase distribution on sub-reflectarray is introduced based on a new formulation. In this method, the distances between the real and virtual focal points of the reflectarray and its nth element are taken into account. Introducing a progressive phase-shift term into the basic equation, the produced pencil beam is scanned accordingly. Actually, the large main reflectarray emulates a parabolic reflector, and by introducing phase control into the elements of the small sub-reflectarray, beam scanning is achieved. These elements are based on an ideal reconfigurable element, while a wideband multi-loop element is considered on the main reflectarray. The beam-scanning performance of this dual-reflectarray antenna is investigated in the XZ-plane and also for eight beams around the broadside direction at 12.5 GHz.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::34be2309f9a33fe217ee1566337f248f https://doi.org/10.1080/02726343.2014.863685 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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