Design and Characterization of Circularly Polarized Discrete Lens Antennas in 60-GHz Band

Kaouach, Hamza

doi:10.1109/lawp.2015.2499703

Cited by 34 publications

(15 citation statements)

References 8 publications

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“…First introduced in [62] and further in [63], the authors have presented a transmitarray with the objective of controlling the polarization of the wavefront. The proposed structure is based on microstrip patch antennas, whose elements in the outer side of the structure are physically rotated (α = 0 • , 90 • , 180 • , and 270 • ) relative to the patch feeding point), to tilt the polarization of the re-transmitted wave.…”

Section: B Transmitarray For Polarization Controlmentioning

confidence: 99%

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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: B Transmitarray For Polarization Controlmentioning

confidence: 99%

“…Although the previous transmitarray designs [62]- [66] are not electronically reconfigurable (most are reconfigurable by mechanical rotation means), they yield to the development of hybrid reconfigurable transmitarray with both beamsteering and polarization capabilities.…”

Section: Hybrid Transmitarraymentioning

confidence: 99%

Review Paper on Transmitarray Antennas

2019

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“…A n array-based lens or transmitarray (TA) [1][2][3][4][5][6][7][8][9][10] is a quasi-periodic planar surface that transforms a certain incident wave into an outgoing one whose characteristics are determined by the TA design. More generally, a TA is a planar lens.…”

Section: Introductionmentioning

confidence: 99%

“…The unit cell is based on stacked patches coupled by crossed slots. Instead of rotating the unit cell, the stacked patches were rotated over the probe that connects them in [6]. Another solution was proposed in [7], where the phase shift is achieved by modifying the size of two concentric-resonant-square metallic rings.…”

Section: Introductionmentioning

confidence: 99%

“…However, this technique cannot be used to analyze TAs, due to the couplings between the metal elements that form the TA. In previous works [1][2][3][4][5][6][7][8][9][10], the radiation pattern of the TA has been estimated, modeling each cell as an isotropic radiator of an array. In general, the results are accurate around the main beam but not for the side lobes.…”

Section: Introductionmentioning

confidence: 99%

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A Simple Model for Analyzing Transmitarray Lenses

Plaza

León

Loredo

et al. 2015

IEEE Antennas Propag. Mag.

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A new model for characterizing a complex system formed by a feeding horn and a transmitarray lens is presented in this paper. This model characterizes the spillover radiation and is capable of analyzing its effect on the radiation pattern. Both the contribution of the lens and the spillover radiation are modeled as planar arrays. The proposed model shows good agreement with the results obtained in simulations using a commercial full-wave software. In addition, some features, such as the characterization of the feeding element, are included in this model, in order to improve its accuracy. Finally, the limits of applicability are also discussed throughout this paper. Thus, it is possible to set up the boundaries, in terms of F=D ratio and number of elements, within which the model is reliable.

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