A broadband KU‐band microstrip reflectarray antenna using single‐layer fractal elements

Xue, Fei; Wang, Hongjian; Liu, Guang

doi:10.1002/mop.29637

Cited by 29 publications

(13 citation statements)

References 15 publications

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“…Though the researchers have attempted to arrange an increased number of elements in the array for achieving more phase compensation, a lesser bandwidth is obtained using this fractal array. Paper 22 reports a similar result obtained using 469 fractal elements. At 13.58 GHz 25.7% gain‐bandwidth and 75% aperture efficiency is obtained with a larger phase variation of 400°.…”

Section: Introductionsupporting

confidence: 66%

“…range in Ku and K band(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25) which is more than the phase range produced in References 4 to 21 except References 12 and 15.2. Compared with the values reported in References 4and 15, a reduced maximum phase sensitivity of 246 / mm is obtained from the smooth phase curve of the proposed unit cell ensuring low fabrication errors.…”

mentioning

confidence: 92%

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A novel Ku/K band reflectarray antenna with reduced phase slope and phase sensitivity

Narayanasamy¹,

Alsath²,

Savarimuthu³

et al. 2021

Int J RF Microw Comput Aided Eng

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The design, development, fabrication, and testing of a wideband reflectarray antenna with a novel concentric ring element operating over Ku/K band frequencies is presented in this paper. The element characterization is performed using the infinite array approach and is inferred that the proposed unit cell offers a higher phase variation of 643 by changing the size of the concentric rings. The proposed reflectarray antenna has a circular geometry and is constructed using 437 elements with an element separation of 0.43λ 0 . The proposed reflectarray offers a 3 dB gain bandwidth of 35% (15-21 GHz). The aperture efficiency is estimated to be 58.78% at 16.5 GHz. The prototype reflectarray is fabricated and tested to validate the simulation results. The measured peak gain of the reflectarray is 28.4 dBi with a side lobe level of −17.6 dB. The measured cross-polarization level is less than −32 dB. Furthermore, it is inferred that the proposed unit cell has a reduced maximum phase sensitivity of 246 /mm with a gain selectivity of 6 dB at the lowest operating frequency.The proposed broadband reflectarray with enhanced performance characteristics is suitable for application in satellite communication and aeronautical radio navigation.

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Section: Introductionsupporting

confidence: 66%

mentioning

confidence: 92%

A novel Ku/K band reflectarray antenna with reduced phase slope and phase sensitivity

Narayanasamy¹,

Alsath²,

Savarimuthu³

et al. 2021

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…However, this could increase the design efforts and make it difficult to be fabricated, especially at millimeter wave frequencies. On the other hand, different patch element designs, such as a combination of elements [15], fractal elements [16], and multiple phase tuning stubs [17] can also be used for the performance enhancement. Among them, the last two designs are only suitable for low frequency operation due to their design complexity, and the first one can face mutual coupling issues due to more than one element being used in it [3].…”

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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“…Despite of the narrowband performance, it is found that for small or moderate size reflectarrays, this shortcoming can be remedied by enhancing the element behavior [4]. A great deal of research efforts has been therefore made to design wideband elements, such as using phase delay lines [5], [6], four arm spiral element [7], fractal element [8], true-time delay lines [9], and subwavelength element [10]. Furthermore, the bandwidth can also be enhanced by employing multi-resonant element [11], [12].…”

Section: Introductionmentioning

confidence: 99%

Design of a Wideband Single-Layer Reflectarray Antenna Using Slotted Rectangular Patch With Concave Arms

Min

Guo

2019

IEEE Access

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A novel single-layer slotted rectangular patch with concave arms is proposed for wideband reflectarrays. The broadband characteristic is realized by combining both bandwidth enhancement techniques, i.e. using multi-resonant element and slotted rectangular patch element. By placing a pair of concave arms beside the slotted rectangular patch, additional resonance is introduced for an improved phase range and linearity. The element is optimized for a rather linear phase range covering 360 • , resulting in a broadband behavior. Key geometrical parameters are studied to apprehend its working principle. Employing the novel unit cell, a reflectarray with 25 • offset-fed, and constituting 23×23 elements with 0.3λ element periodicity at 10 GHz, is simulated and measured. Good agreement is obtained between the simulation and the measurement. The proposed reflectarray features a wide measured 32% 1-dB gain bandwidth and a maximum aperture efficiency of 65%. Furthermore, the measured side-lobe and cross-polarization levels are 20 dB and 32 dB at 10 GHz, respectively.INDEX TERMS Slotted rectangular patch, single-layer, wideband, reflectarray antenna, subwavelength, concave arms.

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A broadband KU‐band microstrip reflectarray antenna using single‐layer fractal elements

Cited by 29 publications

References 15 publications

A novel Ku/K band reflectarray antenna with reduced phase slope and phase sensitivity

A novel Ku/K band reflectarray antenna with reduced phase slope and phase sensitivity

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

Design of a Wideband Single-Layer Reflectarray Antenna Using Slotted Rectangular Patch With Concave Arms

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