Sectorised WiMAX antenna for future vehicular communications systems

ArticleinIET Microwaves Antennas & Propagation 4(2):210 - 218 · March 2010with9 Reads
DOI: 10.1049/iet-map.2009.0088 · Source: IEEE Xplore
Abstract
A narrow band antenna of dimensions 0.54¿×0.28¿×0.09¿ is presented. The design is suited for use in cellular radio-over-fibre networks. Associated mobile equipment using the international unlicensed WiMAX band (5.470-5.725 GHz) is also described. The antenna is well matched across the band and is suitable for a full-duplex bi-directional system with simultaneous transmission ( Tx ) and reception ( Rx ). It can be used with mobile handsets offering WiMAX connections, and in multi-sector configurations for vehicular communication systems.
    • "The material distribution approach to topology optimization, originally developed for the design of load-bearing elastic structures [11], has been used to design various electromagnetic devices [9], [12]–[16]. In this approach, a density function is used to express the distribution of a material in a given domain. "
    [Show abstract] [Hide abstract] ABSTRACT: This communication presents a bandwidth enhanced, compact, monopole loop antenna with modified ground plane for modern automotive ultra wide -band (UWB) applications. The proposed loop antenna has hybrid geometry and is constructed using half circular ring and half square ring.The ground plane of the fundamental radiator is curved and defected to improve the VSWR bandwidth. An extended ground stub is added to further enhance the bandwidth to suit the modern automotive requirements. The designed antenna covers 3.1– 10.9 GHz frequency spectrum with VSWR ≤ 2. This antenna can be conveniently placed inside the shark fin housing on the vehicle’s roof or it can be printed along with the existing Print Circuit Board (PCB) electronics nullifying the need for dedicated location on vehicle’s body for in-car communications. Further, a simple 2 port Multiple Input Multiple Output (MIMO) antenna is constructed and its diversity performance is estimated. The prototype is fabricated and tested for impedanceand radiation characteristics.
    Full-text · Article · Jun 2015
    • "PIFA designs based on a large ground plane usually lead to bandwidths that are very narrow (less than 8%) [10]. The bandwidth is further reduced if the separation between the top radiating and bottom layers is small (about 0.5-0.9% per 0.018 λ, usually for antennas less than 0.168λ in height). "
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  • Full-text · Chapter · Aug 2011 · IET Microwaves Antennas & Propagation
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