A NEW ULTRA-WIDEBAND BEAMFORMING FOR WIRELESS COMMUNICATIONS IN UNDERGROUND MINES | Zendy

Mourad Nedil | Zendy; Tayeb A. Denidni | Zendy; A. Djaiz | Zendy; M.A. Habib | Zendy

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A NEW ULTRA-WIDEBAND BEAMFORMING FOR WIRELESS COMMUNICATIONS IN UNDERGROUND MINES

Author(s) -

Mourad Nedil,

Tayeb A. Denidni,

A. Djaiz,

M.A. Habib

Publication year - 2008

Publication title -

progress in electromagnetics research m

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.216

H-Index - 31

ISSN - 1937-8726

DOI - 10.2528/pierm08070207

Subject(s) - wideband , beamforming , broadband , microstrip , bandwidth (computing) , matrix (chemical analysis) , wireless , ultra wideband , electronic engineering , microstrip antenna , computer science , antenna (radio) , materials science , telecommunications , acoustics , engineering , physics , composite material

—In this paper, a novel ultra-wideband switched-beam antenna system based on 4×4 two-layer Butler matrix is presented and implemented to be used in hostile environment, such as underground mines. This matrix is based on the combination of a broadband two- layer slot-coupled directional coupler and a multilayer slot-coupled microstrip transition. With this configuration, the proposed matrix was designed without using any crossovers as used in conventional Butler matrices. Moreover, this new structure is compact and offers an ultra-wide bandwidth of 6 GHz. To examine the performance of the proposed matrix, experimental prototypes of the multilayer microstrip transition and,the Butler matrix were fabricated and,measured. Furthermore, a three 4-antenna arrays were also designed, fabricated and then connected to the matrix to form a beamforming,antenna system at 3, 5.8 and 6 GHz. As a result, four orthogonal beams are produced in the band 3–9 GHz. This matrix is suitable for ultra- wideband communication systems in confined areas.

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