2 Bit Reconfigurable Unit-Cell and Electronically Steerable Transmitarray at $Ka$ -Band

Diaby, Fatimata; Clemente, Antonio; Sauleau, Ronan; Pham, Trung Kien; Dussopt, Laurent

doi:10.1109/tap.2019.2955655

Cited by 90 publications

(47 citation statements)

References 20 publications

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“…Despite the observed differences between measurements and simulations in terms of insertion losses and -10 dB reflection bandwidth, the working principle of the active unit-cell has been validated. Furthermore, the non-perfect 90° phase-shift does not affect the overall performance of the transmitarray, as demonstrated in [15].…”

Section: A Scattering Parametersmentioning

confidence: 92%

“…The impact of the bias lines on the unit-cell performance has been also analyzed; for brevity purposes, we only consider the unit-cell with two bias lines, one for each pair of p-i-n diodes. The complete study considering a 1414-element transmitarray is presented in [15]. The obtained results show very stable scattering parameters, demonstrating that the bias lines do not affect the RF performance.…”

Section: Experimental Characterizationmentioning

confidence: 98%

“…The proposed unit-cell (size of 5.1×5.1×1.3 mm 3 , λ0/2×λ0/2×λ0/8 at 29 GHz) has been recently used to demonstrate an electronically reconfigurable transmitarray showing the possibility to steer the beam over a 120120degree window [15], [16]. Nonetheless, its individual characterization has never been reported yet.…”

Section: A Fabricated Unit-cellmentioning

confidence: 99%

“…At same time, such an approach provides a very good trade-off between number of solid-state components, complexity of the bias network, efficiency, bandwidth, and power consumption, compared to the continuous phase shift based unit-cell designs. Indeed, a transmitarray with a 2-bit phase quantization exhibits a typical aperture efficiency around 30-40% [15], [16], which is comparable to configurations with continuous phase control [2].…”

Section: Introductionmentioning

confidence: 97%

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Experimental Validation of a 2-Bit Reconfigurable Unit-Cell for Transmitarrays at Ka-Band

et al. 2020

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This paper presents the experimental results of a 2-bit electronically reconfigurable unit-cell for transmitarrays at Ka-band. The proposed unit-cell architecture is based on a six-metal layers design and three dielectric substrates. Two patch antennas are printed respectively on the top and bottom layers of the stack-up to achieve an antenna-filter-antenna structure. To implement the desired 2-bit phase resolution, two p-in diodes are bonded on each patch. The unit-cell has been fabricated and characterized in a specific waveguide simulator. The measurement results are compared to the simulated ones and show minimum transmission loss in the range 1.5-2.3 dB. The 3-dB fractional bandwidth is in the range 10.1-12.1%.

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Section: A Scattering Parametersmentioning

confidence: 92%

Section: Experimental Characterizationmentioning

confidence: 98%

Section: A Fabricated Unit-cellmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Experimental Validation of a 2-Bit Reconfigurable Unit-Cell for Transmitarrays at Ka-Band

et al. 2020

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“…17. 2-bit transmission phase of the proposed unitcell and radiationpattern [20] . 1-비트 위상 양자화 메타표면의 유닛셀 및 투 과 응답특성 [22] Fig.…”

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Tutorial: Reconfigurable Transmitarray Antenna Using Metasurface

Lee¹

2020

J. Korean Inst. Electromagn. Eng. Sci.

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In this paper, we describe the operation principle of a reconfigurable transmitarray antenna(TA) using a transmissive metasurface (MS) and introduce state-of-the-art technology trends. The TA comprises a source antenna; further, the design of a planar MS allows for the control of the wave front from the feed source when the MS exhibits a good transmittance and a full transmission phase variation of 360°. When the MS varies the phase of the transmitted wave passing through the MS such that it is in-phase at the normal plane of the desired direction, a highly directive beam can be obtained in this direction. Two types of methods can be employed to achieve beam steering in the desired direction. One is to control the shape of the transmission phase using an active MS with a changeable transmission phase variation. The other is to control the shape of the transmission phase by varying the wave front of the feed source. The reconfigurable TA has been intensively researched to achieve high efficiency, low-profile, and low-cost performance; further, the implementation and characteristics of various reconfigurable high-gain TAs are analyzed in this study.

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On‐Demand Dynamic Polarization Meta‐transformer

Chen

Zhao

et al. 2022

Laser & Photonics Reviews

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Polarization is one of the key characteristics of light; hence its versatile manipulation plays a pivotal role in wave‐matter interaction, communication, detection, etc. Although metasurfaces have emerged as a promising platform for polarization optics, most of them only support limited polarization controls even in reconfigurable fashion. Here, an on‐demand dynamic polarization meta‐transformer operating for full Poincaré sphere by means of an ultrathin transmissive time‐varying metasurface is proposed. By temporally and independently modulating co‐polarized transmission coefficients of the metasurface for a pair of orthogonal linearly polarized incidence, the effective transmission metasurface anisotropy can be modified to mimic the desired arbitrary birefringence, thus enacting the polarization transformation between incidence and transmission waves with arbitrary polarization states. Experiments have been conducted in the microwave region to verify the design theory. This study may provide a new architecture in polarization optics and may advance the applications in vectorial polarimetry imaging, polarimetry radars, and optical/wireless communications.

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2 Bit Reconfigurable Unit-Cell and Electronically Steerable Transmitarray at $Ka$ -Band

Cited by 90 publications

References 20 publications

Experimental Validation of a 2-Bit Reconfigurable Unit-Cell for Transmitarrays at Ka-Band

Experimental Validation of a 2-Bit Reconfigurable Unit-Cell for Transmitarrays at Ka-Band

Tutorial: Reconfigurable Transmitarray Antenna Using Metasurface

On‐Demand Dynamic Polarization Meta‐transformer

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