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: To mitigate potential interferences with coexisting wireless systems operating over 3.3-3.6 GHz, 5.15-5.35 GHz, or 5.725-5.825 GHz bands, four novel band-notched antennas suitable for ultra-wideband (UWB) applications are proposed. These include UWB antennas with a single wide notched band, a single narrow notched band, dual notched bands, and triple notched bands. Each antenna comprises a half-circle shaped patch with an open rectangular slot and a half-circle shaped ground plane. Good band-notched performance is achieved by using high permittivity and low dielectric loss substrate, and inserting quarter-wavelength horizontal/vertical stubs or alternatively embedding quarter-wavelength open-ended slots within the feed line. The results of both simulation and measurement confirm that the gain suppression of the single and multiple band-notched antennas in each desired notched band are over 15 dB and 10 dB , respectively. The radiation pattern of the proposed triple band-notched design is relatively stable across the operating frequency band.
    IEEE Antennas and Propagation Magazine 08/2013; 61(8):3952-3960. · 1.18 Impact Factor
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    ABSTRACT: This letter presents a printed circuit board (PCB)-based nonplanar dipole antenna with a flat reflector for low-profile ultrawideband applications. Physical fundamentals of the proposed antennas are summarized and discussed. Design considerations, modeling, and implementation methods are introduced in detail. A prototype antenna was fabricated and tested to verify the presented results. The prototype antenna has a measured impedance bandwidth of 7.2 GHz from 2.8 to 10 GHz, and it also possesses stable unidirectional radiation patterns up to 6.0 GHz, which is suitable for many broadband applications.
    IEEE Antennas and Wireless Propagation Letters 01/2012; · 1.67 Impact Factor
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    ABSTRACT: In this paper, a compact planar Ultra-Wideband (UWB) Multiple-input Multiple-output (MIMO) antenna array is proposed. This UWB-MIMO antenna array consists of two identical monopole antenna elements with a novel decoupling structure etched on the ground plane. The antenna performs very well over the UWB frequency range of 3.1-10.6 GHz. The decoupling structure improves the isolation between the antennas over the complete frequency band which can only be achieved otherwise by increasing the separation between the antenna elements. The analysis of antenna performance with and without stub is provided to demonstrate the significance of adding the decoupling stub to the design. The proposed compact and cost efficient antenna array system measures 27 × 47 mm2 only.
    10th International Bhurban Conference on Applied Sciences and Technology, Islamabad, Pakistan; 01/2013

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