Limited Scan-Angle Phased Arrays Using Randomly Grouped Subarrays and Reduced Number of Phase Shifters

Rupakula, Bhaskara; Aljuhani, Abdurrahman H.; Rebeiz, Gabriel M.

doi:10.1109/tap.2019.2935100

Cited by 43 publications

(23 citation statements)

References 15 publications

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“…Our design gives PSLL and scan loss of −22.7 dB and −0.1 dB, at ϑ 0 = 30 • , respectively. Meanwhile, in [43], −13.8 dB and −2.2 dB of PSLL and scan loss are obtained, respectively. This indicates that our design is superior in terms of scan-angles direction, PSLL, and SLC compared with 'Case 1' design in [43].…”

Section: B Final Array Configuration and Performances Summarymentioning

confidence: 93%

“…To further demonstrate the superiority of our results, [43] is selected to be a comparison in several aspects because it optimizes the use of subarrays in the planar array configuration. First of all, our design has capability to scan up to ϑ 0 = 60 • , while in [43] only up to ϑ 0 = 40 • . Therefore, the PSLL and scan-loss comparison are only conducted at ϑ 0 = 30 • .…”

Section: B Final Array Configuration and Performances Summarymentioning

confidence: 99%

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A Toolbox of Subarrays for Optimizing Wide-Angular Scanning Arrays Using Trade-Offs Between Scan Loss and Side Lobe Level

2021

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A novel approach is proposed for building a planar array derived from linear arrays using a toolbox of different types of subarrays located parallel and perpendicular to the linear array axes. The array design assumes constant element patterns and focuses on rectangular array applications with one dimensional, wide-angular beam scanning. Optimization criteria concern a trade-off between side lobe level performance, directive gain scan-loss, reducing the number of element controls and maximizing the use of phase-only elements for beam steering. All subarray configurations and functionalities, for improving the full array performance in sidelobe level and scan-loss compensation, are analyzed and validated in detail. The step-by-step integration of different subarrays starts from the center part of the array. This center part is a linear subarray along the major axis of the rectangular array with uniform maximum amplitude and spatially stretched. This subarray is combined with cross-line subarrays perpendicular to this center axis. At both edges of the center array, two in-line, uniform-amplitude and stretched subarrays are added and combined with cross-line subarrays. The amplitude distribution of the 3 in-line subarrays and the cross-line subarrays allows for lowering the sidelobe level in the plane of scanning. Finally, at both ends of the three in-line subarrays, subarrays with two and five elements are applied for reducing the scan-loss. By assuming cos(ϑ) element pattern results are given for a planar rectangular array with 41 elements length and 3 elements width. To lower cost and higher power efficiency, the array uses only 33 multi-bit phase shifters, 12 1-bit phase switches, and 4 attenuators for amplitude control. Optimized broadside and 60 • scanning patterns are compared and show improved performance in directive gain D = 24.4 dBi (broadside), D = 19.9 dBi (60 • ) and in SLL = −21.6 dB (broadside), SLL = −19.5 dB (60 • ).

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Section: B Final Array Configuration and Performances Summarymentioning

confidence: 93%

Section: B Final Array Configuration and Performances Summarymentioning

confidence: 99%

A Toolbox of Subarrays for Optimizing Wide-Angular Scanning Arrays Using Trade-Offs Between Scan Loss and Side Lobe Level

2021

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“…Planar array topologies based on irregular layouts have been designed by using convex optimization technique with the aim of decreasing the Peak-Side-Lobe-Level (PSLL) [22]- [25]. It has to be observed that the reduction of the PSLL by aperiodic arrangements is obtained by spreading the energy in a larger solid angle, thus raising the Average Side Lobe Level (ASLL) [26] with a consequent maximum array gain reduction. Moreover, these irregular array solutions based on an extensive optimization procedure present some challenges in terms of practical design increasing considerably the complexity of the feeding network [27], [28].…”

Section: Introductionmentioning

confidence: 99%

Exploitation of Triangular Lattice Arrays for Improved Spectral Efficiency in Massive MIMO 5G Systems

Dicandia

Genovesi

2021

IEEE Access

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A thorough analysis of the performance of planar arrays with a regular periodic lattice is carried out and applied to massive multiple-input-multiple-output (MIMO) systems operating within 5G NR n257 and n258 frequency band. It is shown that, among different arrangements with uniform spacing, a triangular lattice guarantees the reduction of the Average Side Lobe Level (ASLL), a better angular scan resolution of the main beam within a predefined angular sector and a lower mutual coupling level among elements. Moreover, single beam and multibeam application scenarios are considered for the performance comparison and both cases assess the remarkable features offered by a triangular arrangement. Particular attention is paid to illustrate, for different propagation channel scenarios, the effects of the array lattice on overall system performance including average gain as well as Signal-to-Interference plus Noise Ratio (SINR) and Sum Spectral Efficiency (SSE). The obtained results prove that a regular and periodic triangular lattice is appealing for arrays to be adopted in massive MIMO 5G systems. INDEX TERMS Antenna array, 5G, massive MIMO, multibeam antenna, broadband array.

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“…Antenna arrays are a very important element of wireless communication systems. Many of new generation systems will be based on different antenna arrays structures [ 1 ]. Therefore, it is important to generate new design techniques for reducing the complexity and the cost of the antenna array system maintaining an optimal radiation performance.…”

Section: Introductionmentioning

confidence: 99%

“…The state of art includes two recent techniques for simplifying the number of phase shifters (PS): the subarrays technology [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ] and the CORPS technology (coherently radiating periodic structures) [ 9 , 10 ]. The subarrays technology considers randomly grouped subarrays in linear and planar arrays for a reduced number of PS.…”

Section: Introductionmentioning

confidence: 99%

Coherently Radiating Periodic Structures to Reduce the Number of Phase Shifters in a 2-D Phased Array

Juárez

Panduro

Covarrubias

et al. 2021

Sensors

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This paper illustrates the application of CORPS (coherently radiating periodic structures) for feeding 2-D phased arrays with a reduced number of phase shifter (PS) devices. Three design configurations using CORPS are proposed for 2-D phased arrays. The design model of phased array for these configurations considers the cophasal excitation required for this structure to set a strategic way for feeding the antenna elements and reducing the number of PS devices. Blocks of 2 × 3 and 4 × 7 CORPS networks depending on the configuration in the 2-D phased array are set strategically in the feeding network to generate the cophasal excitation required in the antenna elements. These design configurations used for feeding the antenna elements in the planar array geometry provide several advantages with respect to others in the scanning capability and the reduction of the number of PS devices of the array system. The full-wave simulation results for the proposed configurations in 2-D phased arrays provide a reduction in the number of PSs of until 69% for a scanning range of ±25° in elevation and ±40° in azimuth. The application of the raised cosine amplitude distribution could generate radiation patterns with a SLL_PEAK ≈ −19 dB and SLL_PEAK ≈ −23 dB for the design proposed configurations in all the scanning range.

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Limited Scan-Angle Phased Arrays Using Randomly Grouped Subarrays and Reduced Number of Phase Shifters

Cited by 43 publications

References 15 publications

A Toolbox of Subarrays for Optimizing Wide-Angular Scanning Arrays Using Trade-Offs Between Scan Loss and Side Lobe Level

A Toolbox of Subarrays for Optimizing Wide-Angular Scanning Arrays Using Trade-Offs Between Scan Loss and Side Lobe Level

Exploitation of Triangular Lattice Arrays for Improved Spectral Efficiency in Massive MIMO 5G Systems

Coherently Radiating Periodic Structures to Reduce the Number of Phase Shifters in a 2-D Phased Array

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