Axial Ratio Enhancement of a Single-Layer Microstrip Reflectarray

Farias, Roger L.; Peixeiro, C.; Heckler, Marcos V. T.; Schlosser, Edson R.

doi:10.1109/lawp.2019.2945641

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…A Floquet port was assigned to excite two orthogonal Floquet modes (TE and TM) with different incident angles. With the correct combination between these modes, circularly polarized waves can be produced, which is necessary for the proposed application: RHCP in the K-band and LHCP in the Kaband [17], [18]. The main inaccuracy of this approach arises from the periodic boundary conditions, which yields an infinite two-dimensional periodic array environment.…”

Section: Parameter Descriptionmentioning

confidence: 99%

On the Reconfigurability of a Singly-Layered Dual-Band Reflectarray for Space Applications

Farias

Peixeiro

Heckler

2023

J. Microw. Optoelectron. Electromagn. Appl.

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This paper presents a feasibility study of a singlylayered dual-band reflectarray for space applications. The data links should operate simultaneously at K-band downlink frequency band 17.7-20.2 GHz with left-hand circular polarization (LHCP) and at Ka-band uplink frequency band 27-30 GHz with right-hand circular polarization (RHCP). The main aim is to present how a reflectarray can be designed so as to allow reconfigurability of its radiation pattern, especially in terms of beam steering to two different directions. The design is automated by means of a computational tool developed in MATLAB environment interfaced with the electromagnetic simulator CST Studio Suite by means of Visual Basic scripts. Simulation results are presented to demonstrate the efficiency of the proposed computational tool and reconfiguration strategy.

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Section: Parameter Descriptionmentioning

confidence: 99%

On the Reconfigurability of a Singly-Layered Dual-Band Reflectarray for Space Applications

Farias

Peixeiro

Heckler

2023

J. Microw. Optoelectron. Electromagn. Appl.

Self Cite

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“…However, reflectarray antennas with moderate aperture size typically have a narrow gain bandwidth due to the narrowband nature of the elements. 2 To improve the bandwidth of the element, some design methods were proposed, such as multilayer structure, 3,4 phase delay line structure, [5][6][7] multiresonant structure, and so on. Among them, multiresonant structure is easy to affect the reflection performance of the unit cell by changing the resonance number, which makes it widespread application.…”

Section: Introductionmentioning

confidence: 99%

A broadband single‐layer reflectarray antenna with split ring element

Li,

Cai,

et al. 2024

Micro & Optical Tech Letters

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A broadband single‐layer reflectarray comprising three‐layer concentric split ring elements is proposed. The reflection phase is achieved by changing the flare angle of the inner and outer split rings. The resonance of the element is easily controlled by varying the relative relationships between the homomorphic patches. And the length of the split ring changes in the azimuth direction, which improves the utilization rate of unit space. The middle split ring acts as a parasitic structure with constant size, making the surface current distribution of the element more uniform to improve the element bandwidth. A reflectarray containing 256 elements is designed and tested. The measured results indicate that the peak gain is 25.3 dBi corresponding to the aperture efficiency of 42%. And the 1‐dB gain bandwidth of the reflectarray of 21.7% is achieved.

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“…However, for small and medium size reflectarrays, the narrow bandwidth caused by the inherent narrowband performance of microstrip elements, which limits its practical applications 1 . Kinds of meaningful efforts have been adopted to design wideband elements, such as using sub‐wavelength components, 2–4 phase delay lines, 5–7 or multilayer substrates 8 . Besides, additional resonances can be introduced by adopting multi‐resonances elements, which is a simple and effective method to achieve phase linearity and range requirement 9–13 …”

Section: Introductionmentioning

confidence: 99%

Design of a wideband bowtie‐shaped reflectarray antenna loaded with parasitic split rings

Cai

Cao

et al. 2021

Micro & Optical Tech Letters

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A novel bowtie‐shaped structure loaded with three concentric split rings is proposed for designing wideband reflectarray antenna with low optimizing complexity. The broadband characteristic of the proposed reflectarray element is realized by exciting multi‐resonances through the surrounded concentric split rings. Furthermore, a linear phase curve covering about 700° can be achieved by simply adjusting the flare angle of the concentric split rings. Based on the element, a prototype of the proposed reflectarray antenna with a diameter of 180 mm is simulated and measured. According to the measured results, the peak gain is 22.8 dBi at 10 GHz corresponding to an aperture efficiency of 42%. Besides, 3‐dB gain bandwidth of 28% (8.5–11.3 GHz) is obtained, and the cross‐polarization levels are below −25 dB for both principal planes.

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Axial Ratio Enhancement of a Single-Layer Microstrip Reflectarray

Cited by 7 publications

References 15 publications

On the Reconfigurability of a Singly-Layered Dual-Band Reflectarray for Space Applications

On the Reconfigurability of a Singly-Layered Dual-Band Reflectarray for Space Applications

A broadband single‐layer reflectarray antenna with split ring element

Design of a wideband bowtie‐shaped reflectarray antenna loaded with parasitic split rings

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