Design and fabrication of a wideband reflectarray antenna in Ku and K bands

Fazaelifar, Mohammad; Jam, Shahrokh; Basiri, Raheleh

doi:10.1016/j.aeue.2018.08.037

Cited by 17 publications

(15 citation statements)

References 16 publications

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“…A wide reflection phase (S 11 phase) range of unit cell element ensures a good bandwidth performance. The substrate of the unit cells can be used as stacked layers, or an air gap can be inserted in it before the ground plane to cope with the narrow bandwidth issue [12][13][14]. However, this could increase the design efforts and make it difficult to be fabricated, especially at millimeter wave frequencies.…”

Section: Introductionmentioning

confidence: 99%

A Novel Asymmetric Patch Reflectarray Antenna with Ground Ring Slots for 5G Communication Systems

et al. 2020

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The narrow bandwidth and low gain performances of a reflectarray are generally improved at the cost of high design complexity, which is not a good sign for high-frequency operation. A dual resonance asymmetric patch reflectarray antenna with a single layer is proposed in this work for 5G communication at 26 GHz. The asymmetric patch is developed from a square patch by tilting its one vertical side by a carefully optimized inclination angle. A progressive phase range of 650° is acquired by embedding a circular ring slot in the ground plane of the proposed element for gain improvement. A 332-element, center feed reflectarray is designed and tested, where its high cross polarization is suppressed by mirroring the orientation of asymmetric patches on its surface. The asymmetric patch reflectarray offers a 3 dB gain bandwidth of 3 GHz, which is 4.6% wider than the square patch reflectarray. A maximum measured gain of 24.4 dB has been achieved with an additional feature of dual linear polarization. Simple design with wide bandwidth and high-gain of asymmetric patch reflectarray make it suitable to be used in 5G communications at high frequencies.

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Section: Introductionmentioning

confidence: 99%

A Novel Asymmetric Patch Reflectarray Antenna with Ground Ring Slots for 5G Communication Systems

et al. 2020

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“…Figure 3 shows the proposed antenna element for the reflectarray antenna. The element is based on EBG structure composed of a circular patch, ring, via, and two varactor diodes which are connected between the inner patch and outer ring [15]. The via connects the inner patch to the ground for biasing the varactors.…”

Section: Design Of Element For the Reflectarray Antennamentioning

confidence: 99%

A circular polarized reflectarray antenna with electronically steerable beam and interchangeable polarizations

Fazaelifar

Jam

Basiri

2020

Int. J. Microw. Wireless Technol.

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The purpose of this paper is the design of a novel single layer reflectarray antenna in X-band, which can electronically steer the antenna beam and change its polarization. Each antenna element includes a circular patch and rings around it, equipped with two varactor diodes, which are positioned perpendicular together to create a circular polarization. First, using these elements, a circular polarized active electromagnetic band-gap (EBG) reflector is implemented. Then, a special feed is placed in a proper distance with respect to EBG reflector and a circular polarized reflectarray antenna is designed, which has capability of switching electronically between right- and left-handed circular polarizations. An electronic active board is designed and fabricated to provide the biasing voltages, control signals, and indicators. The elements of the reflectarray are designed and arranged in such a way that the varactor diodes can be biased independently. Consequently, a 3D beam is created, which can steer up to ±40o. For evaluating the antenna performance, the radiation patterns and the axial ratio of the antenna are determined at the operational frequency of 11.4 GHz. It is illustrated that, increasing the steering angle in θ direction decreases the directivity and the gain of the reflectarray antenna.

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“…Therefore, considerable endeavors have been made for the element bandwidth enhancement, such as exploiting multi-resonant elements [3], polarization rotating elements [4], circular ring and complementary diagonal patch ring elements [5], and subwavelength elements [6], [7]. In addition, the bandwidth of reflectarrays can also be enhanced by attaching phase delay lines or arc stubs on the circular patch or rings / gapped rings, as demonstrated in [8]- [11]. By adjusting the lengths of phase delay lines or arc stubs, a wideband performance can be obtained.…”

Section: Introductionmentioning

confidence: 99%

“…In this article, a novel unit cell consisting of a single-layer circular ring patch dented with sectorial slits is presented for broadband reflectarray antennas. Instead of attaching phase delay lines or arc stubs on the circular patch or rings / gapped rings as shown in [8]- [11], this work employs sectorial slits etched within the circular rings. 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.…”

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%

See 1 more Smart Citation

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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Design and fabrication of a wideband reflectarray antenna in Ku and K bands

Cited by 17 publications

References 16 publications

A Novel Asymmetric Patch Reflectarray Antenna with Ground Ring Slots for 5G Communication Systems

A Novel Asymmetric Patch Reflectarray Antenna with Ground Ring Slots for 5G Communication Systems

A circular polarized reflectarray antenna with electronically steerable beam and interchangeable polarizations

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

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