A Broadband Reflectarray Antenna Using Single-Layer Rectangular Patches Embedded With Inverted L-Shaped Slots

Guo, Lu; Yu, Huiting; Che, Wenquan; Yang, Wanchen

doi:10.1109/tap.2019.2900382

Cited by 43 publications

(30 citation statements)

References 18 publications

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“…Moreover, the phase center errors of the feed horn, phase errors for large incidence angles, fabrication tolerances, and imperfect testing environment may also contribute to the deviation. Table 2 shows a performance comparison between the proposed antenna and some recently published works that employ phase delay lines [8]- [10] and the equal element [16]. It is observed that the proposed antenna combines the advantages of both bandwidth enhancement approaches, and it presents a better or comparable behavior in terms of aperture efficiency, sidelobe / cross polarization levels, and gain bandwidth among all the designs.…”

Section: Reflectarray Results and Discussionmentioning

confidence: 93%

“…Furthermore, the sidelobe and cross polarization levels are 17.5 dB and 32 dB at 10 GHz, respectively. Compared with various recently published designs, such as [8], [9] and [16], this work presents a noticeably wider bandwidth.…”

Section: Introductionmentioning

confidence: 82%

“…adjacent cells, therefore dissatisfying the assumption of equal coupling when analyzing the unit cells [12], [13]. To tackle this issue, various designs have been proposed, such as using the dipole element loaded with an interdigital structure [14], the I-shaped patch surrounded by a circular ring [15], and the rectangular patch etched with slots [16]. By this means, the elements feature an identical dimension for all the cells while the variation of the phase is realized by adjusting the interior parameters inside the structures.…”

Section: Introductionmentioning

confidence: 99%

“…The circular rings feature an equal size for all the cells and the variation of the phase is obtained by changing the lengths of the interior slits. The proposed unit cell combines the advantages of phase delay line or arc stub designs in [8]- [11] and equal element designs in [14]- [16], consequently leading to a greatly improved performance. Numerical investigations are performed for the unit cell optimization to realize a linear phase and a broadband behavior.…”

Section: Introductionmentioning

confidence: 99%

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Broadband Single-Layer Reflectarray Antenna Employing Circular Ring Elements Dented With Sectorial Slits

Guo

2019

IEEE Access

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A broadband single-layer reflectarray antenna comprising circular ring elements dented with sectorial slits is presented. The sizes of circular rings are fixed and equal for all elements, while the variation of the reflected phase is obtained by varying the lengths of the sectorial slits dented within the circular rings. In this arrangement, the rapid geometric variations among the neighboring elements encountered in conventional reflectarray antennas can be prevented. The proposed element can yield a linear reflected phase together with a high reflected magnitude and important geometric parameters are examined to gain an insight into its broadband operation. Using the proposed unit cells, a 25 • offset-fed reflectarray containing 529 elements with a grid periodicity of 0.3λ at 10 GHz, is designed, built, and tested. Experimental results indicate that the designed reflectarray antenna can realize a broad 30% 1-dB gain bandwidth with a 58.3% aperture efficiency. In addition, good sidelobe and cross-polarization levels in the ranges of 17.5 dB and 32 dB are also achieved at 10 GHz.

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Section: Reflectarray Results and Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Broadband Single-Layer Reflectarray Antenna Employing Circular Ring Elements Dented With Sectorial Slits

Guo

2019

IEEE Access

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“…In order to overcome the bandwidth limitation of the reflectarray, there are some techniques such as using thick substrates (including air layer), 4‐6 stacked patch, 7 sub‐wavelength element, 8 or multi resonant elements 9,10 which can improve the bandwidth of the elements of the reflectarray in recent years. The broadband characteristics can be achieved through a combination of various methods mentioned above 11 .…”

Section: Introductionmentioning

confidence: 99%

A single‐layer high‐efficiency ultra‐wideband reflectarray by using quasi‐spiral dipole

Yang

Huang

et al. 2021

Int J RF Mic Comp-Aid Eng

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In this communication, a single‐layer ultra‐wideband element composed of quasi‐spiral dipole is proposed. For the symmetry of the element structure, the element has the same phase response for horizontal, vertical, and circular polarization so that the reflectarray can achieve corresponding polarization if a feed with linear or circular polarization illuminates the reflectarray. For the structure of the quasi‐spiral dipole element, 360° linear phase shift in a wide band (9‐19GHz) is achieved in a small space and it can expand the bandwidth through the sub‐wavelength structure. Compared to the traditional two‐degree‐of‐freedom element, the element can achieve a 360° phase shift in a wide bandwidth and the phase curve is nearly parallel to each other. A 270 mm × 270 mm (27 × 27 elements) reflectarray is designed and fabricated based on the proposed elements. The simulation results almost agree with the measure results. The measured 1‐dB gain bandwidth about 44% (11.5‐18GHz) is achieved and 68% of aperture efficiency at 12GHz, which demonstrates wideband operation for the proposed reflectarray.

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Double‐layer wideband reflectarray using polynomial optimization technology

Yi¹,

Li²,

Yu³

et al. 2021

Int J RF Microw Comput Aided Eng

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In this article, a novel double‐layer wideband reflectarray antenna using polynomial optimization technology is proposed. The reflectarray element has two main variable parameters. When each of the variables is adjusted, the reflectarray element cannot achieve 360° phase shift. However, as the two variables work together, 360° phase shift is easy to be achieved. The polynomial technology is used to connect the two variables, and the differential evolution algorithm is adopted to optimize the element to obtain the appropriate polynomial coefficients. The phase shift curves of different frequencies are parallel to each other and the slopes of the phase shift curves are consistent, which makes the proposed element achieve wideband characteristics. In order to verify the correctness of the proposed design method and reflectarray element, a 441‐element reflectarray antenna was designed, processed, and measured. The proposed reflectarray antenna achieves 35% 1‐dB gain bandwidth. At 12 GHz, the gain and efficiency of the proposed reflectarray antenna are 29 dBi and 62% respectively. In the whole bandwidth, the sidelobe was less than –16 dB and the cross‐polarization was less than –38 dB. It is proved that polynomial automatic optimization technology can guide the design of the multi‐variable wideband reflectarray antenna.

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A Broadband Reflectarray Antenna Using Single-Layer Rectangular Patches Embedded With Inverted L-Shaped Slots

Cited by 43 publications

References 18 publications

Broadband Single-Layer Reflectarray Antenna Employing Circular Ring Elements Dented With Sectorial Slits

Broadband Single-Layer Reflectarray Antenna Employing Circular Ring Elements Dented With Sectorial Slits

A single‐layer high‐efficiency ultra‐wideband reflectarray by using quasi‐spiral dipole

Double‐layer wideband reflectarray using polynomial optimization technology

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