Single-layer polarization-insensitive frequency selective surface for beam reconfigurability of monopole antennas

Das, Priyanka; Mandal, Kaushik; Lalbakhsh, Ali

doi:10.1080/09205071.2019.1688693

Cited by 41 publications

(25 citation statements)

References 26 publications

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“…A simple multiband reconfigurable antenna with dual pairs of PIN diodes [13] and a compact quad-band reconfigurable monopole antenna [14] have also been proposed. However, not all reconfigurable antennas use active elements to achieve reconfigurable properties; there are some passive reconfigurable antennas that were reported in [15][16][17]. In [15], [16], reconfigurable pattern antennas that employ graded dielectric plates and metasurfaces to reconfigure beams in a particular direction were reported.…”

Section: Introductionmentioning

confidence: 99%

“…In [15], [16], reconfigurable pattern antennas that employ graded dielectric plates and metasurfaces to reconfigure beams in a particular direction were reported. The pattern reconfigurable monopole antenna with polarizationinsensitive FSS for beam reconfigurability was reported in [17]. Currently, based on artificial intelligence techniques, antenna resonating frequencies and radiation patterns are being reconfigured, and particle swarm optimization was used in [18] to change the operating frequency.…”

Section: Introductionmentioning

confidence: 99%

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A Compact Grounded Asymmetric Coplanar Strip-Fed Flexible Multiband Reconfigurable Antenna for Wireless Applications

2020

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A compact grounded asymmetric coplanar strip (GACS)-fed flexible multiband frequency reconfigurable antenna with two PIN diodes is proposed. The investigated antenna is backed by a flexible polyamide substrate with compact dimensions of 24 mm × 19 mm and a thickness of 1.53 mm. The investigated antenna structure contains a monopole patch that facilitates operation for wireless LAN applications, whereas inverted L-shaped and F-shaped monopoles facilitate operation for Bluetooth and 5G NR applications. The investigated antenna operates at 2.4, 3.8, and 5.6 GHz with measured impedance bandwidths of 5.8%, 6.3%, and 6.6%, respectively, over the three frequency bands, thus facilitating coverage for Bluetooth, 5G NR, and WLAN standards. The two PIN diodes are employed to tune the investigated antenna among four modes, including a single band mode (WLAN 5.5 GHz), two dual-band modes (5G NR 3.8/5.6 GHz, and Bluetooth 2.48/5.6 GHz), and one multiband mode with Bluetooth (2.4 GHz), 5G New Radio (NR) N77 band (3.8 GHz), and WLAN (5.6 GHz) modes. The investigated antenna radiates unidirectionally with a peak gain of 3.73 dBi at 5.6 GHz. Measurements are carried out on the human body to investigate the behaviour of the wearable antenna. The simulated SAR values are in a safe limit of 1.6 W/kg for 1 g of tissue, according to the FCC. Moreover, the investigated antenna shows extremely low vulnerability to degradation in performance as a result of bending effects concerning impedance matching with acceptable acquiescence between measurements and simulations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Compact Grounded Asymmetric Coplanar Strip-Fed Flexible Multiband Reconfigurable Antenna for Wireless Applications

2020

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“…Further, the associated MSFs in RISs are electromagnetically thin-film and planar artificial structures that have resulted in the realization of Electromagnetic (EM) and optical components with engineered and even atypical functionalities [ 22 , 23 , 24 , 25 ]. In modern communication systems, MSFs have lots of applications such as phase correction [ 26 ], beam reconfigurability [ 27 ], and spatial filter [ 28 ]. MSFs can be made of all-dielectric structures such as printed layers of substrates [ 29 ] or all-metal structures [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Radiation Pattern Prediction for Metasurfaces: A Neural Network-Based Approach

Taghvaee

Jain

Timoneda

et al. 2021

Sensors

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As the current standardization for the 5G networks nears completion, work towards understanding the potential technologies for the 6G wireless networks is already underway. One of these potential technologies for the 6G networks is reconfigurable intelligent surfaces. They offer unprecedented degrees of freedom towards engineering the wireless channel, i.e., the ability to modify the characteristics of the channel whenever and however required. Nevertheless, such properties demand that the response of the associated metasurface is well understood under all possible operational conditions. While an understanding of the radiation pattern characteristics can be obtained through either analytical models or full-wave simulations, they suffer from inaccuracy and extremely high computational complexity, respectively. Hence, in this paper, we propose a neural network-based approach that enables a fast and accurate characterization of the metasurface response. We analyze multiple scenarios and demonstrate the capabilities and utility of the proposed methodology. Concretely, we show that this method can learn and predict the parameters governing the reflected wave radiation pattern with an accuracy of a full-wave simulation (98.8–99.8%) and the time and computational complexity of an analytical model. The aforementioned result and methodology will be of specific importance for the design, fault tolerance, and maintenance of the thousands of reconfigurable intelligent surfaces that will be deployed in the 6G network environment.

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“…In this communication, we demonstrate theoretically a new concept to produce integrated, highly efficient mm-wave CP antennas in which we employ metasurfaces [ 20 , 21 ]. These types of surfaces were proven useful for several applications, including gain enhancement [ 22 ] and phase rectifying [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Chiral Dielectric Metasurfaces for Highly Integrated, Broadband Circularly Polarized Antenna

Ferreira-Gomes

Oliveira

Mejía‐Salazar

2021

Sensors

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We report on the design of a low-profile integrated millimeter-wave antenna for efficient and broadband circularly polarized electromagnetic radiation. The designed antenna comprises a chiral dielectric metasurface built with a 2×2 arrangement of dielectric cylinders with slanted-slots at the center. A broadbeam high-gain with wide axial ratio (AR)<3 dB bandwidth was reached by pairing the electric and magnetic resonances of the dielectric cylinders and the slanted slots when excited by an elliptically polarized driven-patch antenna. This electric-magnetic pairing can be tuned by varying the cylinders diameter and the tilting and rotation angles of the slanted slots. The simulation results indicate impedance-matching bandwidths up to 22.6% (25.3–31.6 GHz) with 3-dB AR bandwidths of 11.6% (26.9–30.2 GHz), which in terms of compactness (0.95λ0×0.95λ0) and performance are superior to previous antenna designs. Since the simulations were performed by assuming materials and geometries easily implementable experimentally, it is hoped that circularly polarized antennas based on chiral metasurfaces can be integrated into 5G and satellite communications.

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Single-layer polarization-insensitive frequency selective surface for beam reconfigurability of monopole antennas

Cited by 41 publications

References 26 publications

A Compact Grounded Asymmetric Coplanar Strip-Fed Flexible Multiband Reconfigurable Antenna for Wireless Applications

A Compact Grounded Asymmetric Coplanar Strip-Fed Flexible Multiband Reconfigurable Antenna for Wireless Applications

Radiation Pattern Prediction for Metasurfaces: A Neural Network-Based Approach

Chiral Dielectric Metasurfaces for Highly Integrated, Broadband Circularly Polarized Antenna

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