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      Circularly Polarized Broadband Printed Antenna for Wireless Applications

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          Abstract

          A simple, compact sickle-shaped printed antenna with a slotted ground plane is designed and developed for broadband circularly polarized (CP) radiation. The sickle-shaped radiator with a tapered feed line and circular slotted square ground plane are utilized to realize the wideband CP radiation feature. With optimized dimensions of 0.29λ × 0.29λ × 0.012λ at 2.22 GHz frequency for the realized antenna parameters, the measured results display that the antenna has a 10 dB impedance bandwidth of 7.70 GHz (126.85%; 2.22–9.92 GHz) and a 3 dB axial ratio (AR) bandwidth of 2.64 GHz (73.33%; 2.28–4.92 GHz). The measurement agrees well with simulation, which proves an excellent circularly polarized property. For verification, the mechanism of band improvement and circular polarization are presented, and the parametric study is carried out. Since, the proposed antenna is a simple design structure with broad impedance and AR bandwidth, which is a desirable feature as a candidate for various wireless communication systems. Because of the easy printed structure and scaling the dimension with broadband CP characteristics, the realized antenna does incorporate in a number of CP wireless communication applications.

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          Metamaterial-Based Antennas

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            A broadband and high-gain metamaterial microstrip antenna

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              Far-Field Interrogation of Microstrip Patch Antenna for Temperature Sensing Without Electronics

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                Author and article information

                Journal
                Sensors (Basel)
                Sensors (Basel)
                sensors
                Sensors (Basel, Switzerland)
                MDPI
                1424-8220
                04 December 2018
                December 2018
                : 18
                : 12
                : 4261
                Affiliations
                [1 ]Centre of Advanced Electronic and Communication Engineering, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
                [2 ]Department of Computer and Communication Engineering, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh
                Author notes
                [* ]Correspondence: samsuzzaman@ 123456ukm.edu.my (M.S.); tariqul@ 123456ukm.edu.my (M.T.I.); Tel.: +60-198-107967 (M.S.)
                Author information
                https://orcid.org/0000-0002-4929-3209
                Article
                sensors-18-04261
                10.3390/s18124261
                6308541
                30518080
                53ed99a2-2b74-4df6-adf9-9af46c34c89e
                © 2018 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 17 October 2018
                : 30 November 2018
                Categories
                Article

                Biomedical engineering
                broadband,circular polarization (cp),compact,planar,sickle-shaped,wireless applications

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