Coherently Radiating Periodic Structures for Feeding Concentric Rings Array with Reduced Number of Phase Shifters

Sanchez, Brian; Panduro, Marco A.; Covarrubias, David H.; Reyna, Alberto; Juárez, Elizvan

doi:10.3390/s22239528

Cited by 6 publications

(4 citation statements)

References 29 publications

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“…ULA with N-antenna elements required N phase shifters or other active control units. There are only a few papers in the literature that propose algorithms or techniques for reducing the number of ULA elements and thus the number of phase shifters [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…To achieve high cost-effectiveness and total energy efficiency, the system can reduce the number of operational antennas for all of the cells. [2][3][4][5][6][7][8][9][10] The overall energy efficiency of the cell is mostly influenced by how many functioning antenna elements there are in the cell for each BS's stipulated power consumption. As novel ideas, the authors of [2] proposed the cascaded angle offset phased array antenna (CAO-PAA) and the dimensionality reduced CAO-PAA (DRCAO-PAA).…”

Section: Introductionmentioning

confidence: 99%

“…Other strategies for reducing the active number of antennas have been proposed [3][4][5][6][7][8][9], including reduced active controller-based vector synthesis. Another method is sub-array compression, which employs a different phase shifter for each sub-array.…”

Section: Introductionmentioning

confidence: 99%

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Beamforming Array Antenna Technique Based on Partial Update Adaptive Algorithms

A. Shubber,

M. Jamel,

K. Nahar

2023

Int. j. electr. comput. eng. syst. (Online)

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The most important issues for improving the performance of modern wireless communication systems are interference cancellation, efficient use of energy, improved spectral efficiency and increased system security. Beamforming Array Antenna (BAA) is one of the efficient methods used for this purpose. Full band BAA, on the other hand, will suffer from a large number of controllable elements, a long convergence time and the complexity of the beamforming network. Since no attempt had previously been made to use Partial Update (PU) for BAA, the main novelty and contribution of this paper was to use PU instead of full band adaptive algorithms. PU algorithms will connect to a subset of the array elements rather than all of them. As a result, a common number of working antennas for the system's entire cells can be reduced to achieve overall energy efficiency and high cost-effectiveness. In this paper, we propose a new architectural model that employs PU adaptive algorithms to control and minimize the number of phase shifters, thereby reducing the number of base station antennas. We will concentrate on PU LMS (Least Mean Square) algorithms such as sequential-LMS, M-max LMS, periodic-LMS, and stochastic-LMS. According to simulation results using a Uniform Linear Array (ULA) and three communications channels, the M-max-LMS, periodic LMS, and stochastic LMS algorithms perform similarly to the full band LMS algorithm in terms of square error, tracking weight coefficients, and estimation input signal, with a quick convergence time, low level of error signal at steady state and keeping null steering's interference-suppression capability intact.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Beamforming Array Antenna Technique Based on Partial Update Adaptive Algorithms

A. Shubber,

M. Jamel,

K. Nahar

2023

Int. j. electr. comput. eng. syst. (Online)

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“…On the other hand, the technique of coherently radiating periodic structures (CORPS) has been studied for the reduction of phase shifters in the BFN [8]. Several CORPS network configurations have been analyzed for single and multi-beam applications [8]- [11]. As a disadvantage, traditional CORPS designs deteriorate the phase slope when the number of layers is increased [12], which reduces the scanning capabilities and increases the SLL.…”

Section: Introductionmentioning

confidence: 99%

Application of Coherently Radiating Periodic Structures for Feeding Subarrays in Limited-Scan Arrays

Juarez,

Panduro,

Covarrubias

et al. 2023

IEEE Open J. Antennas Propag.

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This paper presents a new design technique to improve the reduction of phase shifters using subarrays and CORPS (coherently radiating periodic structures) technology. The CORPS network generates the values of cophasal excitation with reduced input ports. These values feed an optimal sub-arrays structure. Furthermore, fixed and variable amplifiers allow a low SLL (side lobe level) by using a raised cosine amplitude distribution along sub-arrays inputs. The theoretical model of CORPS-Subarrays, numerical and experimental results of several design cases are presented. The proposed design achieves a ±14° scanning range with a higher reduction of phase shifters than other techniques presented previously in the state of art. This paper illustrates, as a contribution, the complete antenna system based on the fabrication of a prototype and experimental results to analyze the reduction capacity of phase shifters and scanning possibilities of the proposed methodology in antenna arrays. The experimental results of the BFN (beam-forming networks) prototype at 6 GHz for 11 antenna elements and 3 phase shifters are provided. The proposed design achieves a reduction of 72% of phased shifters with ±14° beam scanning and -15 dB of SLL.INDEX TERMS Phased Array, beam-scanning, subarrays, CORPS, phase shifters I.

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