Using metasurface structures as signal polarisers in microstrip antennas

Paiva, José Lucas da Silva; Silva, José Patrocínio da; Campos, Antônio Luiz P. S.; Andrade, Humberto Dionísio de

doi:10.1049/iet-map.2018.5112

Cited by 18 publications

(7 citation statements)

References 13 publications

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“…Table shows a comparison between the proposed metasurface superstrate‐loaded patch antenna and the others patch antennas that appeared in literature in terms of gain, radiation efficiency, substrate thickness, and distance of metasurface from patch antenna. The proposed antenna has good results compared to other references . However, the antenna in Reference , has the radiation efficiency of 90%, the gain is only 5.69 dBi and the bandwidth is 60 MHz while the proposed antenna has the better gain of 7.5 dBi and a larger bandwidth of 120 MHz.…”

Section: Radiation Patterns Gain and Radiation Efficiencymentioning

confidence: 78%

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Design of circular patch antenna with a high gain by using a novel artificial planar dual‐layer metamaterial superstrate

Yassini

Aguni

Ibnyaich

et al. 2019

Int J RF Microw Comput Aided Eng

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This study presents a new dual-layer metasurface structure proposed to enhance the performance of a circular patch antenna. A novel unit cell planar metasurface is characterized by nearly equal enhanced effective permeability and permittivity ε r ffi μ r > 1 at the resonant frequency. In addition, a 5*5 array of these unit cells are used as a superstrate over a circular patch antenna which is fed by 50 Ω microstrip line and operating at 2.45 GHz for improving the antenna performance. The patch antenna gain is increased by creating an in-phase electric field area on the top surface of the metasurface. The obtained results showed that the maximum gain of the antenna increased from 2.31 dBi to 7.5 dBi. A 30% increase in the bandwidth is also remarked. The proposed antenna with metasurface occupies an overall volume of 1.01λ g ×1.01λ g ×0.025λ g . The simulation analysis and measured results were performed using the microwave studio, high frequency structure simulator software, and vector network analyzer. The proposed antenna prototype has been fabricated. The measured results indicate that the antenna has a good impedance matching in the desired operating band (2.37-2.49 GHz) with the resonant frequency of 2.44 GHz which make the proposed antenna appropriate for microwave applications. K E Y W O R D S artificial planar metamaterial superstrate, circular patch antenna, gain enhancement, ISM 2.45 GHz, metasurface

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Section: Radiation Patterns Gain and Radiation Efficiencymentioning

confidence: 78%

“…The proposed antenna has good results compared to other references . However, the antenna in Reference , has the radiation efficiency of 90%, the gain is only 5.69 dBi and the bandwidth is 60 MHz while the proposed antenna has the better gain of 7.5 dBi and a larger bandwidth of 120 MHz.…”

Section: Radiation Patterns Gain and Radiation Efficiencymentioning

confidence: 78%

Design of circular patch antenna with a high gain by using a novel artificial planar dual‐layer metamaterial superstrate

Yassini

Aguni

Ibnyaich

et al. 2019

Int J RF Microw Comput Aided Eng

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“…A qualitative comparison between the proposed equilateral CPW-fed slot antenna and six S-band antenna designs with metasurface [20][21][22][23][24][25][26][27][28][29][30][31] is now provided; refer to Figure 25. We analyze, compare, and evaluate the suitability of all these antenna designs for 3U CubeSats using the following criteria: small physical size at S-band, wide impedance and Axial Ratio bandwidth, low reflection coefficient (<−10 dB), orientability, and high gain at S-band.…”

Section: Comparative Study: Brief Comparison With Literature Workmentioning

confidence: 99%

Fully Integrated High Gain S-Band Triangular Slot Antenna for CubeSat Communications

et al. 2021

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Among other CubeSat subsystems, Antenna is one of the most important CubeSat components as its design determines all the telecommunication subsystems’ performances. This paper presents a coplanar wave-guide (CPW)-fed equilateral triangular slot antenna constructed and analyzed for CubeSat communications at S-band. The proposed antenna alone presents high gain and ultra-wide band while its radiation pattern is bidirectional at an unlicensed frequency of 2450 MHz. The objective is to use the CubeSat chassis as a reflector for reducing the back-lobe radiation and hence minimizing interferences with electronic devices inside the CubeSat. This leads to a high gain of 8.20 dBi and a unidirectional radiation pattern at an industrial, scientific and mdical (ISM) band operating frequency of 2450 MHz. In addition to that, the presented antenna is low-profile and exhibits high return loss, ultra-wide impedance bandwidth, and good impedance matching at 2450 MHz.

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“…Metamaterials (MMs), a class of artificial materials comprised of sub-wavelength periodic or non-periodic structures, have received more and more interest in the past few decades [1] due to their extraordinary characteristics in manipulating electromagnetic (EM) waves unavailable in nature [2]. MMs have been widely used in a variety of functional devices so far, such as absorber [3][4][5][6][7][8], cloak [9][10][11][12], sensor [13][14][15], polarizer [16][17][18][19] and so on.…”

Section: Introductionmentioning

confidence: 99%

Photo-Excited Switchable Terahertz Metamaterial Polarization Converter/Absorber

Dong

You-de

et al. 2021

Crystals

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In this paper, a photo-excited switchable terahertz metamaterial (MM) polarization converter/absorber has been presented. The switchable structure comprises an orthogonal double split-ring resonator (ODSRR) and a metallic ground, separated by a dielectric spacer. The gaps of ODSRR are filled with semiconductor photoconductive silicon (Si), whose conductivity can be dynamically tuned by the incident pump beam with different power. From the simulated results, it can be observed that the proposed structure implements a wide polarization-conversion band in 2.01–2.56 THz with the conversion ratio of more than 90% and no pump beam power incident illuminating the structure, whereas two absorption peaks operate at 1.98 THz and 3.24 THz with the absorption rates of 70.5% and 94.2%, respectively, in the case of the maximum pump power. Equivalent circuit models are constructed for absorption states to provide physical insight into their operation. Meanwhile, the surface current distributions are also illustrated to explain the working principle. The simulated results show that this design has the advantage of the switchable performance afforded by semiconductor photoconductive Si, creating a path towards THz imaging, active switcher, etc.

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Using metasurface structures as signal polarisers in microstrip antennas

Cited by 18 publications

References 13 publications

Design of circular patch antenna with a high gain by using a novel artificial planar dual‐layer metamaterial superstrate

Design of circular patch antenna with a high gain by using a novel artificial planar dual‐layer metamaterial superstrate

Fully Integrated High Gain S-Band Triangular Slot Antenna for CubeSat Communications

Photo-Excited Switchable Terahertz Metamaterial Polarization Converter/Absorber

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