A 1600-Element Dual-Frequency Electronically Reconfigurable Reflectarray at X/Ku-Band

Yang, Huanhuan; Yang, Fan; Cao, Xiangyu; Xu, Shenheng; Gao, Jun; Chen, Xibi; Li, Maokun; Li, Tong

doi:10.1109/tap.2017.2694703

Cited by 217 publications

(133 citation statements)

References 24 publications

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“…Metasurfaces, ultrathin metamaterials composed by planar meta‐atoms with tailored EM properties, have exhibited strong abilities to control EM waves, with perfect transmission and absorption of EM waves both realized. With active elements integrated, one can further construct tunable metasurfaces with dynamically controlled functionalities including tunable absorbers and filters. However, most tunable metadevices realized so far are based on reflection geometry which are relatively easy to design, since only two channels exist in such systems for EM waves to radiate or dissipate (i.e., the reflection port and absorption) .…”

Section: Introductionmentioning

confidence: 99%

“…With active elements integrated, one can further construct tunable metasurfaces with dynamically controlled functionalities including tunable absorbers and filters. However, most tunable metadevices realized so far are based on reflection geometry which are relatively easy to design, since only two channels exist in such systems for EM waves to radiate or dissipate (i.e., the reflection port and absorption) . In contrast, high‐performance tunable metadevices in transmission modes are rarely seen, not mentioning those exhibiting dynamically switched dual functionalities.…”

Section: Introductionmentioning

confidence: 99%

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A Tunable Metasurface with Switchable Functionalities: From Perfect Transparency to Perfect Absorption

Lin

Guo

et al. 2020

Advanced Optical Materials

189

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A thin screen exhibiting dynamically switchable transmission/absorption functionalities is highly desired in practice. However, a trilayer transmissive metasurface with active elements controlled in a uniform manner cannot exhibit independently controlled transmission and absorption properties due to intriguing interplays between the scattering and absorbing properties in systems exhibiting inversion symmetries. This motivates to employ the coupled‐mode theory to establish a generic phase diagram for such transmissive metasurfaces with active elements loaded in different layers tuned independently and to guide researchers design tunable metadevices with completely decoupled transmission/absorption responses. Based on such a phase diagram, a microwave metasurface is designed/fabricated with PIN diodes incorporated, and it is experimentally demonstrated that its functionality can switch from perfect transparency to perfect absorption, controlled by external voltages applied across the diodes. In addition to finding immediate applications in practice (e.g., smart radomes), the results of this study also provide a new type of tunable meta‐atom for building metasurfaces with flexible wave‐front control abilities.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Tunable Metasurface with Switchable Functionalities: From Perfect Transparency to Perfect Absorption

Lin

Guo

et al. 2020

Advanced Optical Materials

189

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“…Since then, several works and progress have been made in this area [5][6][7]. Different designs of 1-bit unit cell and metasurface have been proposed in [8][9][10][11][12][13]. Yang and colleagues proposed a simple rectangular element but working effectively in metasurface.…”

Section: Introductionmentioning

confidence: 99%

“…The authors first designed and fabricated 10 × 10 array to demonstrate the working ability of the unit cell and metasurface [8,9]. Afterwards, this work was extended to 1600 element metasurface [10][11][12]. In these papers, the authors theoretically and experimentally demonstrated that the 1-bit metasurface is capable of digital beam focusing, multibeam focusing, scattering, and broadside beam synthesis.…”

Section: Introductionmentioning

confidence: 99%

A Novel Coding Metasurface for Wireless Power Transfer Applications

et al. 2019

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We propose and implement a novel 1-bit coding metasurface that is capable of focusing and steering beam for enhancing power transfer efficiency of the electromagnetic (EM) wave-based wireless power transfer systems. The proposed metasurface comprises 16 × 16 unit cells which are designed with a fractal structure and the operating frequency of 5.8 GHz. One PIN diode is incorporated within each unit cell and enables two states with 180 ° phase change of the reflected signal at the unit cell. The two states of the unit cell correspond to the ON and OFF states of the PIN diode or “0” and “1” coding in the metasurface. By appropriately handling the ON/OFF states of the coding metasurface, we can control the reflected EM wave impinged on the metasurface. To verify the working ability of the coding metasurface, a prototype metasurface with a control board has been fabricated and measured. The results showed that the coding metasurface is capable of focusing beam to desired direction. For practical scenarios, we propose an adaptive optimal phase control scheme for focusing the beam to a mobile target. Furthermore, we prove that the proposed adaptive optimal phase control scheme outperforms the random phase control and beam synthesis schemes.

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“…A sub-reflectarray can improve the behavior of the antenna, either correcting the surface errors of the deployable surface [ 12 ], or providing beam scanning within certain angular range [ 12 , 13 ]. When using electronic controlled elements like MEMs [ 14 , 15 , 16 ], PIN diodes [ 17 , 18 ], varactor diodes [ 19 ] or liquid crystal elements [ 20 , 21 , 22 ] for frequencies higher than 100 GHz.…”

Section: Introductionmentioning

confidence: 99%

Dual-Polarization Ku-Band Compact Spaceborne Antenna Based on Dual-Reflectarray Optics

Tienda

Encinar

Barba

et al. 2018

Sensors

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This article demonstrated an accurate analysis technique for dual-reflectarray antennas that take into account the angle of incidence of the impinging electric field on the main reflectarray cells. The reflected field on the sub and the main reflectarray surfaces is computed using Method of Moments in the spectral domain and assuming local periodicity. The sub-reflectarray is divided into groups of elements and the field radiated by each group is used to compute the incident and reflected field on the main reflectarray cells. A 50-cm demonstrator in Ku-band that provides European coverage has been designed, manufactured and tested to validate the analysis technique. The measured radiation patterns match the simulations and they fulfill the coverage requirements, achieving a cross-polar discrimination better than 25 dB in the frequency range: 12.975–14.25 GHz.

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A 1600-Element Dual-Frequency Electronically Reconfigurable Reflectarray at X/Ku-Band

Cited by 217 publications

References 24 publications

A Tunable Metasurface with Switchable Functionalities: From Perfect Transparency to Perfect Absorption

A Tunable Metasurface with Switchable Functionalities: From Perfect Transparency to Perfect Absorption

A Novel Coding Metasurface for Wireless Power Transfer Applications

Dual-Polarization Ku-Band Compact Spaceborne Antenna Based on Dual-Reflectarray Optics

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