A Miniaturized Antenna with Negative Index Metamaterial Based on Modified SRR and CLS Unit Cell for UWB Microwave Imaging Applications
A miniaturized antenna employing a negative index metamaterial with modified split-ring resonator (SRR) and capacitance-loaded strip (CLS) unit cells is presented for Ultra wideband (UWB) microwave imaging applications. Four left-handed (LH) metamaterial (MTM) unit cells are located along one axis o...
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doaj-8b318c38a99546a78ea6c5cd0cfbbe752020-11-24T20:54:09ZengMDPI AGMaterials1996-19442015-01-018239240710.3390/ma8020392ma8020392A Miniaturized Antenna with Negative Index Metamaterial Based on Modified SRR and CLS Unit Cell for UWB Microwave Imaging ApplicationsMd. Moinul Islam0Mohammad Tariqul Islam1Md. Samsuzzaman2Mohammad Rashed Iqbal Faruque3Norbahiah Misran4Mohd Fais Mansor5Space Science Centre (ANGKASA), Research Centre Building, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, MalaysiaDepartment of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, MalaysiaDepartment of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, MalaysiaSpace Science Centre (ANGKASA), Research Centre Building, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, MalaysiaDepartment of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, MalaysiaDepartment of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, MalaysiaA miniaturized antenna employing a negative index metamaterial with modified split-ring resonator (SRR) and capacitance-loaded strip (CLS) unit cells is presented for Ultra wideband (UWB) microwave imaging applications. Four left-handed (LH) metamaterial (MTM) unit cells are located along one axis of the antenna as the radiating element. Each left-handed metamaterial unit cell combines a modified split-ring resonator (SRR) with a capacitance-loaded strip (CLS) to obtain a design architecture that simultaneously exhibits both negative permittivity and negative permeability, which ensures a stable negative refractive index to improve the antenna performance for microwave imaging. The antenna structure, with dimension of 16 × 21 × 1.6 mm3, is printed on a low dielectric FR4 material with a slotted ground plane and a microstrip feed. The measured reflection coefficient demonstrates that this antenna attains 114.5% bandwidth covering the frequency band of 3.4–12.5 GHz for a voltage standing wave ratio of less than 2 with a maximum gain of 5.16 dBi at 10.15 GHz. There is a stable harmony between the simulated and measured results that indicate improved nearly omni-directional radiation characteristics within the operational frequency band. The stable surface current distribution, negative refractive index characteristic, considerable gain and radiation properties make this proposed negative index metamaterial antenna optimal for UWB microwave imaging applications.http://www.mdpi.com/1996-1944/8/2/392microwave imagingmetamaterialnegative indexUWB |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Md. Moinul Islam Mohammad Tariqul Islam Md. Samsuzzaman Mohammad Rashed Iqbal Faruque Norbahiah Misran Mohd Fais Mansor |
spellingShingle |
Md. Moinul Islam Mohammad Tariqul Islam Md. Samsuzzaman Mohammad Rashed Iqbal Faruque Norbahiah Misran Mohd Fais Mansor A Miniaturized Antenna with Negative Index Metamaterial Based on Modified SRR and CLS Unit Cell for UWB Microwave Imaging Applications Materials microwave imaging metamaterial negative index UWB |
author_facet |
Md. Moinul Islam Mohammad Tariqul Islam Md. Samsuzzaman Mohammad Rashed Iqbal Faruque Norbahiah Misran Mohd Fais Mansor |
author_sort |
Md. Moinul Islam |
title |
A Miniaturized Antenna with Negative Index Metamaterial Based on Modified SRR and CLS Unit Cell for UWB Microwave Imaging Applications |
title_short |
A Miniaturized Antenna with Negative Index Metamaterial Based on Modified SRR and CLS Unit Cell for UWB Microwave Imaging Applications |
title_full |
A Miniaturized Antenna with Negative Index Metamaterial Based on Modified SRR and CLS Unit Cell for UWB Microwave Imaging Applications |
title_fullStr |
A Miniaturized Antenna with Negative Index Metamaterial Based on Modified SRR and CLS Unit Cell for UWB Microwave Imaging Applications |
title_full_unstemmed |
A Miniaturized Antenna with Negative Index Metamaterial Based on Modified SRR and CLS Unit Cell for UWB Microwave Imaging Applications |
title_sort |
miniaturized antenna with negative index metamaterial based on modified srr and cls unit cell for uwb microwave imaging applications |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2015-01-01 |
description |
A miniaturized antenna employing a negative index metamaterial with modified split-ring resonator (SRR) and capacitance-loaded strip (CLS) unit cells is presented for Ultra wideband (UWB) microwave imaging applications. Four left-handed (LH) metamaterial (MTM) unit cells are located along one axis of the antenna as the radiating element. Each left-handed metamaterial unit cell combines a modified split-ring resonator (SRR) with a capacitance-loaded strip (CLS) to obtain a design architecture that simultaneously exhibits both negative permittivity and negative permeability, which ensures a stable negative refractive index to improve the antenna performance for microwave imaging. The antenna structure, with dimension of 16 × 21 × 1.6 mm3, is printed on a low dielectric FR4 material with a slotted ground plane and a microstrip feed. The measured reflection coefficient demonstrates that this antenna attains 114.5% bandwidth covering the frequency band of 3.4–12.5 GHz for a voltage standing wave ratio of less than 2 with a maximum gain of 5.16 dBi at 10.15 GHz. There is a stable harmony between the simulated and measured results that indicate improved nearly omni-directional radiation characteristics within the operational frequency band. The stable surface current distribution, negative refractive index characteristic, considerable gain and radiation properties make this proposed negative index metamaterial antenna optimal for UWB microwave imaging applications. |
topic |
microwave imaging metamaterial negative index UWB |
url |
http://www.mdpi.com/1996-1944/8/2/392 |
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