Gain Enhancement of Wideband Circularly Polarized UWB Antenna Using FSS

Adibi, Shima; Honarvar, Mohammad; Lalbakhsh, Ali

doi:10.1029/2020rs007098

Cited by 57 publications

(33 citation statements)

References 23 publications

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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]. In contrast to previous antenna designs using bulky metallic-based chiral metasurfaces [14,15], we exploit the pairing of electric and magnetic resonances of high-permittivity (ε = 16) cylindrical resonators with slanted slots at the center.…”

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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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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“…Compared to a single DRA layer, the double-layer DRA fed by a single microstrip feedline successfully enhanced the impedance and AR bandwidth, the far-field characteristic, as well as the antenna gain. There are various techniques that have been proposed recently in the antenna design, for example by introducing frequency selective surface (FSS) [20][21][22], near-field transformation [23] and electromagnetic band gap (EBG) structure [24]. Alternatively, in the DRA antenna, a higher gain can be achieved by exciting the higher mode of the DRA, and this leads to the simplicity of the design.…”

Section: Introductionmentioning

confidence: 99%

Higher-Order-Mode Triple Band Circularly Polarized Rectangular Dielectric Resonator Antenna

et al. 2021

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The paper presents a triband circular polarized rectangular dielectric resonator antenna. A single coaxial cable feeds the DRA to a double stub strip on the DRA side. A patch strip coupled to the feed assists in widening the bandwidth of the proposed DRA. The degenerate mode pair TE∂11x and higher-TE∂23x has been excited to achieve CP and enhance the antenna gain. The higher-order mode has been excited using a low-cost simple excitation mechanism without compromising on the size and shape of the DRA. An impedance bandwidth of 48% with a gain ~6–9 dBic was achieved in all resonance frequencies. Additionally, the AR bandwidth of 5.5%, 4.2%, and 2.76% was obtained at three different frequencies. Note that the proposed DRA exhibits a wide beamwidth of 112o, which is good for better signal reception. A comparison between the measured with simulated results shows that the measured results are matched by the simulated result trends.

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“…In recent years, to improve the performance of the antenna, additional periodic structures in the form of substrates or superstrates have been loaded above the antenna or below the antenna 6–24 . In the References 15,16, the metamaterial structure was designed and loaded to the antenna to improve its performance.…”

Section: Introductionmentioning

confidence: 99%

“…In the References 15,16, the metamaterial structure was designed and loaded to the antenna to improve its performance. However the performance in terms of gain, directivity was improved but the metamaterial structure has some additional losses due to the insertion of metal laminates in its structure 16 . In the Reference 17, a frequency selective surface (FSS) layer was added below the U‐slot antenna.…”

Section: Introductionmentioning

confidence: 99%

“…Several approaches have been reported to enhance the gain of microstrip antenna, such are antenna with defected ground structure (DGS), 5 substrate, 6 superstrate, [7][8][9] reflective surface, [10][11][12][13][14] and metamaterial. 15,16 In the Reference 5, multiple input multiple output (MIMO) antenna with a DGS structure was designed to improve the gain of an antenna. However, the antenna with DGS or with slots in the ground affects the radiation pattern which is important to be considered.…”

Section: Introductionmentioning

confidence: 99%

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Angularly stable frequency selective surface for the gain enhancement of isolated multiple input multiple output antenna

Rahman

Deng

Sajjad

et al. 2021

Micro & Optical Tech Letters

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A metasurface is highly useful for improving the performance of patch antennas and reducing their size due to their inherent and unique electromagnetic properties. In this research work, we design a wideband bandstop reflector‐based frequency selective surface (FSS). It consists of a periodic array of circular shape metallic rings with four stubs. The FSS unit cell resonates over a frequency band from 7.2 to 9.2 GHz and has excellent stability under different polarizations and incident angles. A microstrip patch‐based isolated multiple input multiple output (MIMO) antenna is designed that operates over a frequency band of 7.9GHz to 8.7 GHz. The MIMO antenna and FSS are printed on the one face of a substrate. The radiation performance such as gain and directivity of the antenna is improved due to parasitic radiation of the surface and coherent‐ superposition of energy in the far‐field, between the antenna and FSS unit cells. Where the other parameters such are efficiency, radiation pattern and isolation are well preserved. The designed structure shows low complexity during fabrication. The simulated and experimental results confirm the predicted antenna performance and gain enhancement.

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Gain Enhancement of Wideband Circularly Polarized UWB Antenna Using FSS

Cited by 57 publications

References 23 publications

Chiral Dielectric Metasurfaces for Highly Integrated, Broadband Circularly Polarized Antenna

Chiral Dielectric Metasurfaces for Highly Integrated, Broadband Circularly Polarized Antenna

Higher-Order-Mode Triple Band Circularly Polarized Rectangular Dielectric Resonator Antenna

Angularly stable frequency selective surface for the gain enhancement of isolated multiple input multiple output antenna

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