Retrodirective Metasurface Operating Simultaneously at Multiple Incident Angles

Kalaagi, Mohammed; Seetharamdoo, Divitha

doi:10.1049/cp.2018.0545

Cited by 6 publications

(3 citation statements)

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“…Since then, there has been extensive research related to anomalous reflection [2][3][4]. Specifically, retrodirectivity can be achieved using the planar type of a MS using the generalized Snell's law [5,6]. In [5], a MS simultaneously operating at multiple incident angles designed using array of striplines on the ground plane for only the TM wave.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, retrodirectivity can be achieved using the planar type of a MS using the generalized Snell's law [5,6]. In [5], a MS simultaneously operating at multiple incident angles designed using array of striplines on the ground plane for only the TM wave. Additionally, binary MS was observed to achieve an efficient retroreflector for each TE and TM wave at near-grazing incidence [6].…”

Section: Introductionmentioning

confidence: 99%

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One-Dimensionally Polarization-Independent Retrodirective Metasurface

Lee

2019

J Electromagn Eng Sci

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A one-dimensionally polarization-independent retrodirective metasurface (PIRMS) is proposed in this letter. The retrodirective metasurface (RMS) consists of ring structures on its ground plane to achieve the polarization-independent characteristics. The reflection phases of unitcells of the metasurface can be controlled by the radius of the ring structure, and the dimension of the supercell with the 2π phase variation depends on an incident angle and operation frequency from the generalized Snell's law. To verify its feasibility, two kinds of RMSs to operate at two retrodirected angles of 20° and 40° are designed and measured at 5.8 GHz. The measured retroreflected power efficiencies are more than 94% and 92% at the retrodirected angles of 20° and 40°, respectively, regardless of the polarization. The results show that the proposed RMS has good performances independent of polarization.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

One-Dimensionally Polarization-Independent Retrodirective Metasurface

Lee

2019

J Electromagn Eng Sci

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“…Electromagnetic energy harvesters have been conceptualized and prototyped in various transportation fields, such as vehicle suspension ( Azam et al., 2021a , 2021b ; Bai and Liu, 2021 ; Kireev et al., 2017 ) and speed-bump ( Wang et al., 2016 ; Todaria, 2016 ; Azam et al., 2021a , 2021b ) energy harvesters, owing to their high energy harvesting efficiency and strong controllability. Electromagnetic-based vibration energy harvesting systems in the railway field mainly include linear ( Gao et al., 2017 ; Cleante, 2015 ; Ghandchi Tehrani et al., 2013 ) and rotary ( Pourghodrat et al., 2011 ; Kalaagi and Seetharamdoo, 2019 ; Costanzo et al., 2019 ) generators. Both line-side and on-board linear generators absorb ambient vibration to drive permanent magnets to reciprocate linearly between coils to generate electrical energy ( Gao et al., 2018 ; De Pasquale et al., 2012a , 2012b ).…”

Section: Introductionmentioning

confidence: 99%

A review of vibration energy harvesting in rail transportation field

Pan

et al. 2022

iScience

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A novel retroreflective planar Luneburg lens for the radar cross section enhancement

Jiao

Wan

et al. 2022

Int J RF Mic Comp-Aid Eng

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A novel retroreflective planar Luneburg lens for the radar cross section (RCS) enhancement is proposed in this paper. The planar Luneburg lens consists of 10 layers of metasurfaces, which are used to realize the layered permittivity distribution of three-dimensional (3D) gradient-index Luneburg lens. First, a single-layer planar metasurface element is designed. The element consists of one single substrate layer and a metallic layer, and two metal square ring patches are etched on the substrate. Then, by using the transformation optics (TO) and the metasurface element, the equivalent layered permittivity distribution with 2-25 relative permittivity is realized, and elements of the planar Luneburg lens illuminated by the 30 oblique incident plane wave are designed. Finally, a 10-layer retroreflective planar Luneburg lens at 5 GHz is designed, fabricated and measured. At 5 GHz frequency, its measured RCS values in most of the incident angle domain from À60 to 60 are enhanced in different degrees. The most notable enhancements occur in the incident angle domain around À27 and 27 , while the maximum measured RCS enhancement is more than 25 dB. This is the first time that the planar Luneburg lens is used to increase its RCSs with many incident angles.

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Retrodirective Metasurface Operating Simultaneously at Multiple Incident Angles

Cited by 6 publications

References 0 publications

One-Dimensionally Polarization-Independent Retrodirective Metasurface

One-Dimensionally Polarization-Independent Retrodirective Metasurface

A review of vibration energy harvesting in rail transportation field

A novel retroreflective planar Luneburg lens for the radar cross section enhancement

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