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A Negative Index Metamaterial-Inspired UWB Antenna with an Integration of Complementary SRR and CLS Unit Cells for Microwave Imaging Sensor Applications.

Islam MT, Islam MM, Samsuzzaman M, Faruque MR, Misran N - Sensors (Basel) (2015)

Bottom Line: This integration enables a design layout that allows both a negative value of permittivity and a negative value of permeability simultaneous, resulting in a durable negative index to enhance the antenna sensor performance for microwave imaging sensor applications.This antenna sensor achieves a 131.5% bandwidth (VSWR < 2) covering the frequency bands from 3.1 GHz to more than 15 GHz with a maximum gain of 6.57 dBi.High fidelity factor and gain, smooth surface-current distribution and nearly omni-directional radiation patterns with low cross-polarization confirm that the proposed negative index UWB antenna is a promising entrant in the field of microwave imaging sensors.

View Article: PubMed Central - PubMed

Affiliation: Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, 43600 Selangor, Malaysia. tariqul@ukm.edu.my.

ABSTRACT
This paper presents a negative index metamaterial incorporated UWB antenna with an integration of complementary SRR (split-ring resonator) and CLS (capacitive loaded strip) unit cells for microwave imaging sensor applications. This metamaterial UWB antenna sensor consists of four unit cells along one axis, where each unit cell incorporates a complementary SRR and CLS pair. This integration enables a design layout that allows both a negative value of permittivity and a negative value of permeability simultaneous, resulting in a durable negative index to enhance the antenna sensor performance for microwave imaging sensor applications. The proposed MTM antenna sensor was designed and fabricated on an FR4 substrate having a thickness of 1.6 mm and a dielectric constant of 4.6. The electrical dimensions of this antenna sensor are 0.20 λ × 0.29 λ at a lower frequency of 3.1 GHz. This antenna sensor achieves a 131.5% bandwidth (VSWR < 2) covering the frequency bands from 3.1 GHz to more than 15 GHz with a maximum gain of 6.57 dBi. High fidelity factor and gain, smooth surface-current distribution and nearly omni-directional radiation patterns with low cross-polarization confirm that the proposed negative index UWB antenna is a promising entrant in the field of microwave imaging sensors.

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The surface current distribution at (a) 4 GHz; (b) 6 GHz; (c) 8 GHz; (d) 10 GHz; (e) Scale.
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sensors-15-11601-f017: The surface current distribution at (a) 4 GHz; (b) 6 GHz; (c) 8 GHz; (d) 10 GHz; (e) Scale.

Mentions: The surface current distribution of the proposed MTM UWB antenna at frequencies 4, 6, 8 and 10 GHz are shown in Figure 17. It is observed that the unit cells on the patch, microstrip line and rectangular slots at the top edge of the partial ground plane played important roles for creating resonances and achieving UWB frequency bands with a negative index metamaterial. In particular, the microstrip line and slotted ground plane had major effects at 4, 6, 8 and 10 GHz. At the top edge on the patch, there were strong effects due to the 1st and 4th unit cells at 4 GHz; 1st , 2nd, 3rd, and 4th unit cells at 6 GHz; 1st, and 4th unit cells at 8 GHz; and 1st, 2nd, 3rd unit cells at 10 GHz. This ensures that the performance of this UWB antenna depends on the unit cells on the patch, the feeding, and the rectangular slots at the top edge on the partial ground plane. The surface current maintains a harmonic flow at both the patch and the ground plane, resulting in the generation of an ultra-wide frequency band by a negative index metamaterial.


A Negative Index Metamaterial-Inspired UWB Antenna with an Integration of Complementary SRR and CLS Unit Cells for Microwave Imaging Sensor Applications.

Islam MT, Islam MM, Samsuzzaman M, Faruque MR, Misran N - Sensors (Basel) (2015)

The surface current distribution at (a) 4 GHz; (b) 6 GHz; (c) 8 GHz; (d) 10 GHz; (e) Scale.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4481945&req=5

sensors-15-11601-f017: The surface current distribution at (a) 4 GHz; (b) 6 GHz; (c) 8 GHz; (d) 10 GHz; (e) Scale.
Mentions: The surface current distribution of the proposed MTM UWB antenna at frequencies 4, 6, 8 and 10 GHz are shown in Figure 17. It is observed that the unit cells on the patch, microstrip line and rectangular slots at the top edge of the partial ground plane played important roles for creating resonances and achieving UWB frequency bands with a negative index metamaterial. In particular, the microstrip line and slotted ground plane had major effects at 4, 6, 8 and 10 GHz. At the top edge on the patch, there were strong effects due to the 1st and 4th unit cells at 4 GHz; 1st , 2nd, 3rd, and 4th unit cells at 6 GHz; 1st, and 4th unit cells at 8 GHz; and 1st, 2nd, 3rd unit cells at 10 GHz. This ensures that the performance of this UWB antenna depends on the unit cells on the patch, the feeding, and the rectangular slots at the top edge on the partial ground plane. The surface current maintains a harmonic flow at both the patch and the ground plane, resulting in the generation of an ultra-wide frequency band by a negative index metamaterial.

Bottom Line: This integration enables a design layout that allows both a negative value of permittivity and a negative value of permeability simultaneous, resulting in a durable negative index to enhance the antenna sensor performance for microwave imaging sensor applications.This antenna sensor achieves a 131.5% bandwidth (VSWR < 2) covering the frequency bands from 3.1 GHz to more than 15 GHz with a maximum gain of 6.57 dBi.High fidelity factor and gain, smooth surface-current distribution and nearly omni-directional radiation patterns with low cross-polarization confirm that the proposed negative index UWB antenna is a promising entrant in the field of microwave imaging sensors.

View Article: PubMed Central - PubMed

Affiliation: Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, 43600 Selangor, Malaysia. tariqul@ukm.edu.my.

ABSTRACT
This paper presents a negative index metamaterial incorporated UWB antenna with an integration of complementary SRR (split-ring resonator) and CLS (capacitive loaded strip) unit cells for microwave imaging sensor applications. This metamaterial UWB antenna sensor consists of four unit cells along one axis, where each unit cell incorporates a complementary SRR and CLS pair. This integration enables a design layout that allows both a negative value of permittivity and a negative value of permeability simultaneous, resulting in a durable negative index to enhance the antenna sensor performance for microwave imaging sensor applications. The proposed MTM antenna sensor was designed and fabricated on an FR4 substrate having a thickness of 1.6 mm and a dielectric constant of 4.6. The electrical dimensions of this antenna sensor are 0.20 λ × 0.29 λ at a lower frequency of 3.1 GHz. This antenna sensor achieves a 131.5% bandwidth (VSWR < 2) covering the frequency bands from 3.1 GHz to more than 15 GHz with a maximum gain of 6.57 dBi. High fidelity factor and gain, smooth surface-current distribution and nearly omni-directional radiation patterns with low cross-polarization confirm that the proposed negative index UWB antenna is a promising entrant in the field of microwave imaging sensors.

Show MeSH