A miniaturized metamaterial slot antenna for wireless applications

Ali, Tanweer; Saadh, Mohammad A W; Biradar, Rajashekhar C.; Anguera, Jaume; Andújar, Aurora

doi:10.1016/j.aeue.2017.10.005

Cited by 87 publications

(42 citation statements)

References 28 publications

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“…For instance, SRR unit cell structures have been investigated for antenna design miniaturization, creating multiband operation, and improving bandwidth and gain [23,24]. Moreover, several multiband antennas loaded with metamaterial have been reported in [25][26][27][28], where there are trade-off characteristics, including the number of operating bands, size, and gain. However, miniaturization of antenna size can be attained using substrates with high permittivity or small size radiating elements [29].…”

Section: Introductionmentioning

confidence: 99%

Metamaterial Cell-Based Superstrate towards Bandwidth and Gain Enhancement of Quad-Band CPW-Fed Antenna for Wireless Applications

Al‐Bawri

Islam

Wong

et al. 2020

Sensors

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A multiband coplanar waveguide (CPW)-fed antenna loaded with metamaterial unit cell for GSM900, WLAN, LTE-A, and 5G Wi-Fi applications is presented in this paper. The proposed metamaterial structure is a combination of various symmetric split-ring resonators (SSRR) and its characteristics were investigated for two major axes directions at (x and y-axis) wave propagation through the material. For x-axis wave propagation, it indicates a wide range of negative refractive index in the frequency span of 2–8.5 GHz. For y-axis wave propagation, it shows more than 2 GHz bandwidth of near-zero refractive index (NZRI) property. Two categories of the proposed metamaterial plane were applied to enhance the bandwidth and gain. The measured reflection coefficient (S11) demonstrated significant bandwidths increase at the upper bands by 4.92–6.49 GHz and 3.251–4.324 GHz, considered as a rise of 71.4% and 168%, respectively, against the proposed antenna without using metamaterial. Besides being high bandwidth achieving, the proposed antenna radiates bi-directionally with 95% as the maximum radiation efficiency. Moreover, the maximum measured gain reaches 6.74 dBi by a 92.57% improvement compared with the antenna without using metamaterial. The simulation and measurement results of the proposed antenna show good agreement.

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Section: Introductionmentioning

confidence: 99%

Metamaterial Cell-Based Superstrate towards Bandwidth and Gain Enhancement of Quad-Band CPW-Fed Antenna for Wireless Applications

Al‐Bawri

Islam

Wong

et al. 2020

Sensors

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“…At present, the research of metamaterials involves many fields, such as antenna, cloak, and sensor. [5][6][7][8][9] And one of the most important fields is electromagnetic wave absorber.…”

Section: Introductionmentioning

confidence: 99%

An Ultra‐Broadband Metamaterial Absorber with High Absorption Rate Throughout the X‐Band

Jiang

Zhao

et al. 2019

Physica Status Solidi (b)

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This paper presents a polarization‐insensitive and ultra‐broadband metamaterial absorber (UMMA), which has higher absorption throughout the whole X‐band. The UMMA unit cell consists of a metal film and a multilayer‐cross‐cone structure separated by a dielectric layer. The calculation result shows that the UMMA's absorptivity is greater than 96% in the entire X‐band (8–12 GHz) and the UMMA is polarization‐insensitive for normal incident wave. Moreover, the absorption rate is also more than 80% in X‐band when the incident angle is less than 56° for TE polarization wave. The electric field, magnetic field, and surface current distribution of the UMMA are analyzed to study its absorption mechanism. The influences of different key structural parameters on the absorber are also discussed, including the arm length and arm width of the bottom and top of the cross‐cone structure and the number of layers of the cross metal, consequently, a set of optimized design parameters is obtained. The proposed UMMA has a higher absorption rate in the entire X‐band, the UMMA can be used in electromagnetic stealth, electromagnetic shielding, secret detection and so on.

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“…A test in planning such wireless systems is to configure smaller, ease, multiband and broadband antennas. For this, numerous promising double or multiband antennas outlines, such as, the microstrip‐line‐sustained antennas, Slots, fractals, metamaterials, , DGS etc.…”

Section: Introductionmentioning

confidence: 99%

A compact multiband band slot antenna for wireless applications

Khan

Ali

Devanagavi

et al. 2019

Internet Technology Letters

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A compact (20 × 20 × 1.6 mm3) planar four band antenna operating at 1.35 (lower Global Navigation Satellite System [GNSS]), 2.57 (lower Worldwide Microwave Access [WiMAX]), 4.57 (C‐band) and for 5.13 GHz (Wireless Local Area Network [WLAN]) is presented. By utilizing slot method in the radiating patch and the ground plane the aforementioned operating bands are achieved. The antenna has a miniaturized dimension of 0.09λ0 × 0.09λ0 × 0.007λ0 (where λ0 is the free space wavelength at the lower frequency of 1.35 GHz, and exhibits good impedance match, acceptable radiation efficiency and stable radiation pattern at the targeted frequencies.

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A miniaturized metamaterial slot antenna for wireless applications

Cited by 87 publications

References 28 publications

Metamaterial Cell-Based Superstrate towards Bandwidth and Gain Enhancement of Quad-Band CPW-Fed Antenna for Wireless Applications

Metamaterial Cell-Based Superstrate towards Bandwidth and Gain Enhancement of Quad-Band CPW-Fed Antenna for Wireless Applications

An Ultra‐Broadband Metamaterial Absorber with High Absorption Rate Throughout the X‐Band

A compact multiband band slot antenna for wireless applications

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