Electronically Reconfigurable FSS-Inspired Transmitarray for 2-D Beamsteering

Reis, João R.; Caldeirinha, Rafael F. S.; Hammoudeh, Akram; Copner, Nigel

doi:10.1109/tap.2017.2723087

Cited by 83 publications

(52 citation statements)

References 10 publications

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“…The authors have demonstrated that the phase-shift introduced by the transmitarray can be varied by simply modifying the physical size of the squares, and such can be further improved by stacking several layers of FSS on top of each others. In fact, the concept of stacked layers separated by an air gap is widely used for transmitarray implemented with FSS since it allows to increase both the bandwidth and the transmission phase of the structure, as thoroughly reported in [5], [51], [54], [55], [58].…”

Section: ) Reconfigurable Based On Fssmentioning

confidence: 99%

Review Paper on Transmitarray Antennas

2019

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This paper presents a thorough review of transmitarray devices particularly aiming antenna beamsteering, gathering some of the most relevant solutions published by the scientific community in the field. First, the background for realizing 1-D and 2-D antenna beamsteering with a transmitarray is introduced. Subsequently, several examples of unit-cells for transmitarray implementation and complete transmitarray designs presented in the literature are outlined. Each solution is analyzed in detail, identifying the nature of its layout, e.g., based on microstrip patches, frequency selective surfaces (FSS), or metamaterials (MMs), and the method employed to enable electronic reconfigurability, e.g., p-in diodes, varactor diodes, or microelectromechanical systems (MEMS). In addition, some models with the capability of controlling the wavefront polarization modes are also included herein since these are the base of hybrid transmitarrays, i.e., transmitarray with both electronic beamsteering and polarization control. Finally, all the models are compared against each other in order to highlight their benefits and limitations, summarizing their main characteristics, such as the frequency of operation and bandwidth, insertion loss, physical dimensions, and maximum beamsteering range, when available.

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Section: ) Reconfigurable Based On Fssmentioning

confidence: 99%

Review Paper on Transmitarray Antennas

2019

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“…Several wideband fixed- [14]- [15] or switched-beam [16], and electronically-reconfigurable TAs [12], [13], [17]- [20] have been presented and demonstrated in the literature up to sub-THz frequencies [21]. In our previous works [12], [18], the possibility to implement electronic beam-scanning has been successfully shown using 1-bit reconfigurable TAs with 800 p-i-n diodes integrated on the antenna aperture.…”

Section: Introductionmentioning

confidence: 99%

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

Diaby

Clemente

Sauleau

et al. 2020

IEEE Trans. Antennas Propagat.

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This paper presents the design, optimization, fabrication, and characterization of an electronically steerable transmitarray with 2 bits of phase quantization per unit cell. The proposed transmitarray operates in linear polarization at Ka-band and is composed of 14×14 reconfigurable unit-cells. Four p-in diodes are integrated on each unit-cell to control the radiated field phase distribution across the transmitarray aperture. The prototype demonstrates experimentally pencil beam scanning over a 120×120-degree window, a maximum gain at broadside of 19.8 dBi, and a 3-dB fractional bandwidth of 16.2%.

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“…Several printed electronically steerable transmitarrays have been demonstrated in the last decade from L-up to Ka-band [5]. Continuous phase control [6]- [8] or phase quantization techniques [9]- [16] are used to tune the transmission phase and perform beam-forming functions.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the performance presented in [9] are highly affected by the large value of the RF-MEMS switch resistance, with insertion loss in the range 4.9-9.2 dB (depending on the phase-shift state of the unit-cell). As clearly presented in the recent survey paper [5], phase quantization with 1-bit resolution is typically used in the actual state-of-the-art on electronically reconfigurable transmitarrays; this choice is often driven by the fact that 1-bit phase quantization can be achieved using a limited number of switches and metal layers. The unit-cell architecture validated experimentally here paves the way for 2-bit steerable transmitarrays at Ka-band, with improved performance compared to their 1-bit counterparts.…”

Section: Introductionmentioning

confidence: 99%

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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Electronically Reconfigurable FSS-Inspired Transmitarray for 2-D Beamsteering

Cited by 83 publications

References 10 publications

Review Paper on Transmitarray Antennas

Review Paper on Transmitarray Antennas

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

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

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