A Metasurface-Based Single-Layered Compact AMC-Backed Dual-Band Antenna for Off-Body IoT Devices

Ahmad, Sarosh; Paracha, Kashif Nisar; Sheikh, Yawar Ali; Ghaffar, Adnan; Butt, Arslan Dawood; Alibakhshikenari, Mohammad; Soh, Ping Jack; Khan, Salahuddin; Falcone, Francisco

doi:10.1109/access.2021.3130425

Cited by 44 publications

(26 citation statements)

References 25 publications

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“…Moreover, as electric permittivity and magnetic permeability characterize a specific material, metamaterials have negative values for either one or both [ 7 ]. Among such materials, a split-ring resonator (SRR) is a better choice to achieve optimum surface wave suppression, selectivity, and size miniaturization features in many RF microwave devices [ 8 , 9 , 10 ]. The SRR was first recommended by Pendry [ 11 ] and experimentally demonstrated by Smith et al [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Wearable Dual-Band Patch Antenna Based on EBG and SRR Surfaces

Wajid

Ahmad

Ullah

et al. 2022

Sensors

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This paper presents the performance comparison of a dual-band conventional antenna with a split-ring resonator (SRR)- and electromagnetic bandgap (EBG)-based dual-band design operating at 2.4 GHz and 5.4 GHz. The compactness and dual-frequency operation in the legacy Wi-Fi range of this design make it highly favorable for wearable sensor network-based Internet of Things (IoT) applications. Considering the current need for wearable antennas, wash cotton (with a relative permittivity of 1.51) is used as a substrate material for both conventional and metamaterial-based antennas. The radiation characteristics of the conventional antenna are compared with the EBG and SRR ground planes-based antennas in terms of return loss, gain, and efficiency. It is found that the SRR-based antenna is more efficient in terms of gain and surface wave suppression as well as more compact in comparison with its two counterparts. The compared results are found to be based on two distinct frequency ranges, namely, 2.4 GHz and 5.4 GHz. The suggested SRR-based antenna exhibits improved performance at 5.4 GHz, with gains of 7.39 dbi, bandwidths of 374 MHz, total efficiencies of 64.7%, and HPBWs of 43.2 degrees. The measurements made in bent condition are 6.22 db, 313 MHz, 52.45%, and 22.3 degrees, respectively. The three considered antennas (conventional, EBG-based, and SRR-based) are designed with a compact size to be well-suited for biomedical sensors, and specific absorption rate (SAR) analysis is performed to ensure user safety. In addition, the performance of the proposed antenna under bending conditions is also considered to present a realistic approach for a practical antenna design.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of Wearable Dual-Band Patch Antenna Based on EBG and SRR Surfaces

Wajid

Ahmad

Ullah

et al. 2022

Sensors

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“…A CPW-fed split-ring-resonator (SRR) = based implantable antenna for medical telemetry applications was shown in another work [22,23]. The antenna's overall area was claimed to be 2422 mm 2 , and the flexible substrate was Polyimide with a thickness of 0.07 mm.…”

Section: Introductionmentioning

confidence: 99%

A Wideband Bear-Shaped Compact Size Implantable Antenna for In-Body Communications

et al. 2022

Self Cite

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Biomedical implantable antennas play a vital role in medical telemetry applications. These types of biomedical implantable devices are very helpful in improving and monitoring patients’ living situations on a daily basis. In the present paper, a miniaturized footprint, thin-profile bear-shaped in-body antenna operational at 915 MHz in the industrial, scientific, and medical (ISM) band is proposed. The design is a straightforward bear-shaped truncated patch excited by a 50-Ω coaxial probe. The radiator is made up of two circular slots and one rectangular slot at the feet of the patch, and the ground plane is sotted to achieve a broadsided directional radiation pattern, imprinted on a Duroid RT5880 roger substrate with a typical 0.254-mm thickness (= 2.2, tan = 0.0009). The stated antenna has a complete size of 7 mm × 7 mm × 0.254 mm and, in terms of guided wavelength, of 0.027 × 0.027 × 0.0011. When operating inside skin tissues, the antenna covers a measured bandwidth from 0.86 GHz to 1.08 GHz (220 MHz). The simulations and experimental outcomes of the stated design are in proper contract. The obtained results show that the calculated specific absorption rate (SAR) values inside skin of over 1 g of mass tissue is 8.22 W/kg. The stated SAR values are lower than the limitations of the federal communications commission (FCC). Thus, the proposed miniaturized antenna is an ultimate applicant for in-body communications

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“…At present, to meet the existing 5G demand new design approaches and novel concepts for antenna design are necessary. Some research works have recently been performed on designing antenna arrays for 5G networks using traditional antenna structures [7][8][9]. However, due to the size constraint of today's wireless devices, it is challenging to design multiple-input multiple-output (MIMO) antennas with small size and low mutual coupling [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Some research works have recently been performed on designing antenna arrays for 5G networks using traditional antenna structures [7][8][9]. However, due to the size constraint of today's wireless devices, it is challenging to design multiple-input multiple-output (MIMO) antennas with small size and low mutual coupling [8][9][10]. In recent years Dielectric Resonator Antenna (DRA) has gained predominant importance in MIMO systems because of its small size, high gain, radiation efficiency, ease of excitation and fabrication [11,12].…”

Section: Introductionmentioning

confidence: 99%

A CPW fed quad-port MIMO DRA for sub-6 GHz 5G applications

Iqbal

Nasir²,

Qureshi³

et al. 2022

PLoS ONE

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The present work investigates a novel four-port, multiple-input multiple-output (MIMO), single element dielectric resonator antenna (DRA) for sub-6 GHz band. The DRA is designed and fabricated into a symmetric cross shape and fed using a coplanar waveguide (CPW) feed. A single radiator with four ports is rarely found in the literature. The -10 dB impedance bandwidth covered by the antenna is from 5.52 GHz to 6.2 GHz (11.6%) which covers fifth generation (5G) new radio (NR) bands N47 and wireless local area network (WLAN) IEEE 802.11a band. The isolation between orthogonal ports is about 15 dB while the isolation between opposite ports is 12 dB. The radiation pattern of the proposed antenna is bidirectional due to the absence of a ground plane below the DRA. The orthogonal modes excited in the DRA are TEδ21x and TE2δ1y through the four symmetrical CPW feeds. The simulated and measured results of the proposed design show that MIMO characteristics are achieved by pattern diversity between the ports. Due to the perfect symmetry of the design, the proposed work could be extended to MIMO array applications as well.

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A Metasurface-Based Single-Layered Compact AMC-Backed Dual-Band Antenna for Off-Body IoT Devices

Cited by 44 publications

References 25 publications

Performance Analysis of Wearable Dual-Band Patch Antenna Based on EBG and SRR Surfaces

Performance Analysis of Wearable Dual-Band Patch Antenna Based on EBG and SRR Surfaces

A Wideband Bear-Shaped Compact Size Implantable Antenna for In-Body Communications

A CPW fed quad-port MIMO DRA for sub-6 GHz 5G applications

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