Frequency-Reconfigurable Slot Antenna Enabled by Thin Anisotropic Double Layer Metasurfaces

Majumder, Basudev; Krishnamoorthy, Kothandam; Mukherjee, Jayanta; Ray, K. P.

doi:10.1109/tap.2016.2526081

Cited by 30 publications

(18 citation statements)

References 25 publications

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“…To keep the manuscript concise and focused, we thus do not show the radiation properties, including far-filed patterns and gains. Simulation results confirm that the proposed MSs alter the COFs of the slot antenna without significantly affecting its radiation patterns, which is consistent with previous observations in [6], [7].…”

Section: B Results and Discussionsupporting

confidence: 90%

“…a slot antenna and a metasurface with the rectangular-loop unit cell was presented to exhibit a wide tuning range from 2.64 to 3.22 GHz. In [7], an MSFR antenna comprising two identical anisotropic metasurfaces and a slot antenna was proposed. The operating frequency of the proposed antenna can be tuned from 2.55 to 3.45 GHz with a fractional tuning range of around 28%.…”

Section: Introductionmentioning

confidence: 99%

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Accurate and Robust Characterization of Metasurface-Enabled Frequency Reconfigurable Antennas by Radially Homogeneous Model

Man

2019

IEEE Access

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A category of frequency reconfigurable antennas realized by rotating mechanically a metasurface mounted atop a source radiator has attracted growing attention. Their electromagnetic properties and range of frequency reconfigurability have, nevertheless, not been satisfactorily studied. To this end, an equivalent radially homogeneous model is firstly proposed in this paper. The retrieval process is accordingly formulated to address the polarization dependence of the retrieved effective electromagnetic parameters. A couple of typical metasurface-based frequency mechanically reconfigurable antennas are thus characterized by the proposed model. The predicted central operating frequencies are validated against the results of full-wave simulation and the measurement ones of manufactured proof-of-concept prototypes. Further comparisons to the isotropic and the anisotropic models confirm superior accuracy, robustness, and simplicity of the proposed characterization model. In addition, frequency reconfigurable range is shown to be determined by the anisotropy of the metasurface, related to the geometrical symmetry of its constitutive unit cell. INDEX TERMS Metasurface, anisotropic model, electromagnetic homogenization, NRW.

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Section: B Results and Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Accurate and Robust Characterization of Metasurface-Enabled Frequency Reconfigurable Antennas by Radially Homogeneous Model

Man

2019

IEEE Access

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“…Majumder et al [15] have suggested a physical rotation technique of the MS layers for frequency reconfiguration. This technique, however, is not feasible for practical applications.…”

Section: Rotational Technique Of the Ms Layersmentioning

confidence: 99%

“…Various structures are reported in the literature, where the operating frequency of the radiator can be reconfigured by varying the effective permittivity of the MS superstrates loaded on the radiator. A technique of physical rotation of the MS with respect to the radiator has been applied in these structures for varying the effective permittivity of the MS [13][14][15]. In [13], a patch antenna with an MS superstrate placed atop of it yields a frequency tuning range of 14.6% (4.76-5.51 GHz).…”

Section: Introductionmentioning

confidence: 99%

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Frequency reconfigurable slot antenna using metasurface for cognitive radio applications

Chatterjee

Mohan

Dixit

2019

IET Microwaves, Antennas & Propagation

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A dual‐port antenna system designed for cognitive radio applications is presented in this study. The structure comprises of an ultra‐wideband (UWB) sensing antenna and a reconfigurable communicating antenna. The former is a stepped slot structure with an offset feed, which covers the whole UWB frequency band from 3 to 10.6 GHz, whereas the latter is a dual‐band slot antenna (DBSA) fed with a fork‐shaped microstrip‐line feed and loaded with two identical layers of meandered metasurfaces (MSs). Frequency agility is realised by rotating the MS layers for the DBSA antenna. The dual‐band communicating antenna has three switchable states with tuning ranges of 28 and 45% in the lower‐ and upper‐frequency bands, respectively. The degree of isolation and gain in all three states are appreciable. The proposed structure is fabricated and measured, which has a good agreement with the simulated results.

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Artificial neural network based metasurface inspired planar frequency reconfigurable antenna for wireless applications

Kaur

Sivia

Rajni³

2021

Int J RF Microw Comput Aided Eng

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The growing interest in attaining various appealing features of wireless communication systems has motivated researchers to design innovative antennas. This paper analyzes the behavior of a low profile artificial neural networkbased metasurface (MS) inspired two-layered frequency reconfigurable antenna (ANN-MSFRA) using planar technology. The designed two-layered structure is a combination of two substrates mounted one above the other, having no air gap between them. The prototype of the proposed antenna is fabricated on Rogers RO4350B material having permittivity (ε r ) = 3.48, and thickness (h) = 1.524 mm. The MS is represented as an artificially generated periodical array of H and I-shaped metallic inclusions. Numerically analyzed results validate the double negative properties of metamaterial. To verify the effectiveness of the projected two-layered approach, the performance of the reconfigurable antenna is analyzed through both simulations and measurements. The antenna successfully reconfigures the operating frequency from 4.86 to 5.89 GHz, covering the operating bandwidth of 1.03 GHz with a fractional tuning range of 19.1%. The presented simulated and measured outcome provides a positive correlation.The developed ANN model suggested for the estimation of specific output parameters shows minimum error during analysis and synthesis.

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Frequency-Reconfigurable Slot Antenna Enabled by Thin Anisotropic Double Layer Metasurfaces

Cited by 30 publications

References 25 publications

Accurate and Robust Characterization of Metasurface-Enabled Frequency Reconfigurable Antennas by Radially Homogeneous Model

Accurate and Robust Characterization of Metasurface-Enabled Frequency Reconfigurable Antennas by Radially Homogeneous Model

Frequency reconfigurable slot antenna using metasurface for cognitive radio applications

Artificial neural network based metasurface inspired planar frequency reconfigurable antenna for wireless applications

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