Low-Profile Directional Ultra-Wideband Antenna for See-Through-Wall Imaging Applications

Zhu, F. and Gao, S. and Ho, A.T.S. and Brown, T. and Li, J. and Xu, J. (2011) Low-Profile Directional Ultra-Wideband Antenna for See-Through-Wall Imaging Applications. Progress in Electromagnetics Research, 121 . pp. 121-139. ISSN 1070-4698. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.2528/PIER11080907

Abstract

A compact-size planar antenna with ultra-wideband (UWB) bandwidth and directional patterns is presented. The antenna can be fabricated on a printed circuit board (PCB). On one side of the PCB, it has a circular patch, and on the other side it has a slot-embedded ground plane with a fork-shaped feeding stub in the slot. Directional radiation is achieved by using a reflector below the antenna. To reduce the thickness of the antenna, a new low-profile antenna configuration is proposed. Three types of directional UWB antennas are analyzed. The distance between the antenna and the reflector is 12mm (0:16 lambda0,lambda0 is the free space wavelength at the lowest frequency). In order to validate the design, a prototype is also fabricated and measured. Measured results agree well with the simulated ones. The measured results confirm that the proposed antenna features a reflection coe±cient below -10 dB over the UWB range from 4.2 GHz to 8.5 GHz, a maximum gain around 9 dBi, a front-to-back ratio over 17 dB and pulse fidelity higher than 90% in the time domain. Thus it is promising for see-through-wall imaging applications.

Item Type: Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics (see also: telecommunications) > TK7871.6 Antennas and waveguides
Divisions: Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: J. Harries
Date Deposited: 04 Sep 2012 14:13
Last Modified: 05 Mar 2013 16:45
Resource URI: http://kar.kent.ac.uk/id/eprint/30440 (The current URI for this page, for reference purposes)
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