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Electrically Small and Low Cost Smart Antenna for Wireless Communication

Liu, Haitao, Gao, Steven, Loh, Tian Hong (2012) Electrically Small and Low Cost Smart Antenna for Wireless Communication. IEEE Transactions on Antennas and Propagation, 60 (3). pp. 1540-1549. ISSN 0018-926X. (doi:10.1109/TAP.2011.2180300) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:30437)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL
http://dx.doi.org/10.1109/TAP.2011.2180300

Abstract

A compact low-cost low-power smart antenna has been proposed in this paper. To reduce the cost and power consumption,it employs the structure of an Electronically Steerable

Parasitic Array Radiator (ESPAR) antenna. To reduce the size of the antenna, a top-disk loaded monopole and six folded monopoles are employed as the driven element and parasitic elements, respectively. The proposed antenna is called “folded monopole ESPAR antenna”. The heights of the top-disk loaded monopole and folded monopoles are reduced to be less than . Furthermore, the radius of the folded monopole ESPAR antenna is reduced by

using capacitive loading technique. An equivalent circuit model is proposed for analyzing the antenna. To validate the concept, a prototype is developed and the antenna operates from 2.3 GHz to 2.55 GHz. The measured results confirm that the folded monopole ESPAR antenna can achieve electronically beam scanning in horizontal plane over a 360 range. The prototype antenna achieves a gain of 4.0 dBi and a front-back ratio of 20 dB. The parasitic

elements are loaded by varactors and beam forming is achieved by controlling the DC voltages applied to the varactors.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2011.2180300
Uncontrolled keywords: beam forming, bean steering, ESPAR, small antenna, smart antenna
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK7800 Electronics > TK7871.6 Antennas and waveguides
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: J. Harries
Date Deposited: 04 Sep 2012 13:50 UTC
Last Modified: 16 Nov 2021 10:08 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/30437 (The current URI for this page, for reference purposes)
Gao, Steven: https://orcid.org/0000-0002-7402-9223
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