Planar antennas

Inst. for Infocomm Res., Singapore
IEEE Microwave Magazine (Impact Factor: 1.5). 01/2007; DOI: 10.1109/MW-M.2006.250315
Source: IEEE Xplore

ABSTRACT This article reviews the state of the art in broadband antennas for emerging UWB applications and addresses the important issues of the broadband antenna design for UWB applications. First, a variety of planar monopoles with finite ground planes are reviewed. Next, the roll antennas with enhanced radiation performance are outlined. After that, the planar antennas printed on PCBs are described. A directional antipodal Vivaldi antenna is also presented for UWB applications. Last, a UWB antenna for wearable applications is exemplified

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    ABSTRACT: A planar dipole antenna is proposed with enhanced impedance and gain performance across an ultrawideband (UWB) operating bandwidth of 3.1-10.6 GHz. The proposed antenna consists of two semi-elliptical-ended arms connected by a shorting bridge. With the shorting bridge, the length of the antenna is reduced and the radiation performance in terms of gain is improved especially at higher frequencies. The performance of the proposed antenna is validated experimentally using a wideband balun to realize the microstrip-co-planar strip transition. The results show that the proposed antenna can achieve a gain of 2.4-6.2 dBi across a VSWR=2 impedance bandwidth of 118% (2.8-10.9 GHz). The time domain responses of pulsed UWB signals through conventional and proposed antennas are compared. Furthermore, a parametric study is performed to provide antenna engineers with the information about the design.
    IEEE Transactions on Antennas and Propagation 11/2009; · 2.33 Impact Factor

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