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 34 publications

(17 citation statements)

References 25 publications

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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

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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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Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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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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“…The ultra-wideband (UWB) technology has received massive attention in telecommunication and sensing applications due to the provision of very high bit rates of 500 Mbps at a low cost [1,2]. This technology has a vital role in various applications, such as sensor networks, body area networks, health monitoring, navigation systems, smart homes, and pulse radars [3][4][5][6][7]. As the UWB systems engage in an ultra-wide bandwidth to obtain high data rates, UWB antennas must have steady responses regarding gain, impedance matching, radiation pattern, polarization, etc.…”

Section: Introductionmentioning

confidence: 99%

A Frequency Selective Surface Loaded UWB Antenna for High Gain Applications

Awan¹,

Choi²,

Hussain³

et al. 2022

Computers, Materials &Amp; Continua

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This paper presents the design of wideband and high gain Frequency Selective Surface (FSS) loaded antenna for ultra-wideband (UWB) wireless applications requiring high-gain. The antenna consists of a monopole and an FSS reflector. Initially, a conventional rectangular monopole antenna is modified using slot and stub to achieve wide operational bandwidth and size reduction. This modified antenna shows 50% miniaturization compared to a primary rectangular monopole, having a wide impedance bandwidth of 3.6-11.8 GHz. Afterward, an FSS is constructed by the combination of circular and square ring structures. The FSS array consisting of 8 × 8-unit cells are integrated with the antenna as a reflector to enhance the performance of the proposed miniaturized UWB antenna. The loading of FSS results in an improvement of at least 4 dBi gain in the entire operational bandwidth. Moreover, the antenna's bandwidth is also increased at the lower frequency band due to the presence of the FSS. A prototype of the antenna is fabricated and tested to verify the simulation results. The simulation and measurement results show that the antenna offers a wideband -10 dB impedance bandwidth ranging from 2.55-13 GHz with a stable peak gain of 8.6 dBi and retains the radiation pattern stability.

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

Cited by 34 publications

References 25 publications

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

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

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

A Frequency Selective Surface Loaded UWB Antenna for High Gain Applications

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